(Math: approximate the square root)

#include<iostream>
using namespace std;
bool issafe(int** arr,int x,int y,int n){
    for(int row=0;row<=x;row++){
        if(arr[x][y]==1){
            return false;
        }
    }
    int row=x;
    int col=y;
    while(row>=0 && col>=0){
        if(arr[row][col]==1){
            return false;
        }
        row--;
        col--;
    }
     row=x;
     col=y;
    while(row>=0 && col<n){
        if(arr[row][col]==1){
            return false;
        }
        row--;
        col++;
    }
    return true ;
}
bool nqueen(int** arr,int x,int n){
    if(x>=n){
        return true;
    }
    for(int col=0;col<=n;col++){
        if(issafe(arr,x,col,n)){
            arr[x][col]==1;
            if(nqueen(arr,x+1,n)){
                return true;
            }
            arr[x][col]=0;  //backtracking
            
        }
    }
    return false;
}
int main(){
    int n;
    cin>>n;
    int** arr=new int*[n];
    for(int i=0;i<n;i++){
        arr[i]=new int[n];
        for(int j=0;j<n;j++){
            arr[i][j]=0;

        }
    }
    if(nqueen(arr,0,n)){
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                cout<<arr[i][j]<<"";
            }cout<<endl;
        }
    }


    return 0;
}

#include <iostream>
#include<cmath>
#include<ctime>
#include<string>
#include <iomanip>
#include <fstream>

using namespace std;




void decToBinary(int n)
{
    // array to store binary number 
    int binaryNum[3][3];
    
    //converting to binary 
    for (int i = 0; i < 3; i++) 
    {
        for (int j = 0; j < 3; j++)
        {
            binaryNum[i][j] = n % 2;
            n = n / 2;

        }
     }       

    // printing binary> array in reverse order 
    for (int i = 3-1; i >= 0; i--){
        for (int j = 3 - 1; j >= 0; j--)
        {
            if (binaryNum[i][j] == 0)
                cout << "H" << " ";
            else
                cout << "T" << " ";
        }
        cout << endl;
    }
    
 }

int main()
{
    int n;
    cout << "Enter a decimal number between 1 and 512 ";
    cin >> n;

    decToBinary(n);
    return 0;
}

#include <iostream>
#include<cmath>
#include<ctime>
#include<string>
#include <iomanip>
#include <fstream>

using namespace std;


bool primeNumber(int n);
bool Emirp(int n);
int reversal(int n);
int recursive(int a, int b);

int main()
{
	
	int count = 0;
	int number = 13;
	while (count <= 100)
	{
		if (Emirp(number))
		{
			count++;
			if (count % 10 == 0)
				cout << setw(7) << number << endl;
			else
				cout << setw(7) << number;
		}
		number++;
	}
		

}
bool primeNumber(int n) {
	
		for (int i = 2; i <= n / 2; i++) {
			
			if (n % i == 0) {

				return false;
			}
		}
		return true;
}

bool Emirp(int n) {
	

	return primeNumber(n) && primeNumber(reversal(n));
	
}

int reversal(int n) {
	
		if (n < 10) {
			
				return n;
			
		}
		return recursive(n % 10, n / 10);
	
}

int recursive(int a, int b) {

	if (b < 1) {

		return a;

	}
	return recursive(a * 10 + b % 10, b / 10);
	
}



	
   

///LIBRARIES & SPECIFIC PARAMETERS
#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>
#include <U8g2lib.h>

Adafruit_PWMServoDriver servo = Adafruit_PWMServoDriver(0x40);  //ServoMotor Driver Controller I2C Address
U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE); //OLED Constructor

//- - - - VARIABLES & METHODS - - - -//

#define jky 13              //Joystick button pin
#define emgPin A0           //EMG signal pin
#define emgThreshold 500    //EMG signal detection threshold   

/*----OLED Display & Driver----*/
void u8g2_prepare(void) {
  u8g2.setFontMode(1);              //Enable Transparent Font
  u8g2.setFont(u8g2_font_6x13_tf);  //Set font Width: 6px / Height: 13px
  u8g2.setFontRefHeightExtendedText();    
  u8g2.setFontPosTop();             //Origin Position of Text
  u8g2.setFontDirection(0);         //Font direction 0º
}
//Custom Drawn Symbols
static const unsigned char back[] U8X8_PROGMEM  = {
  0x04, 0x06, 0x7F, 0x86, 0x84, 0x60, };

/*---- Servo Driver Variables ----*/
#define Freq (uint8_t) 50     //Servo working frequency

#define posMin 102
#define posMax 512

//Finger Number Assignation for Servo Control
#define thumb (uint8_t) 0
#define index (uint8_t) 1
#define middle (uint8_t) 2 
#define ring (uint8_t) 3
#define pinky (uint8_t) 4
#define wrist (uint8_t) 5

//Method to map servo position from pulses to degrees
void setServo(uint8_t n_servo, uint8_t angulo){
  int duty;
  duty=map(angulo, 0, 180, posMin, posMax);
  servo.setPWM(n_servo, 0, duty);
}

//Method for EMG signal detection and actuation
void emg(void (*pointer)()){
  if((analogRead(A0))>emgThreshold){
    pointer();    
  }
  else{
    openHand();
  }
}

/*---- Hand Movements Methods ----*/
void closeHand(void){
    setServo(thumb,170);
    setServo(index,170);
    setServo(middle,175);
    setServo(ring,151);
    setServo(pinky,161);
    setServo(wrist,180);
}
void openHand(void){
    setServo(thumb,13);
    setServo(index,10 );
    setServo(middle,13);
    setServo(ring,13);
    setServo(pinky,13);
    setServo(wrist,180);
}
void rock_servo(void){
    setServo(thumb,170);
    setServo(index,13);
    setServo(middle,175);
    setServo(ring,151);
    setServo(pinky,13);
    setServo(wrist,180);
}
void ronaldinho_servo(){
    setServo(thumb,13);
    setServo(index,156);
    setServo(middle,145);
    setServo(ring,151);
    setServo(pinky,13);
    while(analogRead(A0)>emgThreshold){
      setServo(wrist,150);
      delay(400);
      setServo(wrist,180);
      delay(500);
    }
}
void point_servo(void){
    setServo(thumb,170);
    setServo(index,13);
    setServo(middle,145);
    setServo(ring,151);
    setServo(pinky,161);
    setServo(wrist,180);
}
void thumbsUp_servo(void){
    setServo(thumb,13);
    setServo(index,156);
    setServo(middle,145);
    setServo(ring,151);
    setServo(pinky,161);
    setServo(wrist,180);
}

/*---- Joystick Button----*/
#define jkyX A1
#define jkyY A2

uint8_t swbtn_state=0;    // Memory Storage Byte
bool btn_val=0;           // Current state of the button
bool btn_oldVal=1;        // Previous state of the button  

//Joystick Button Method
void btn_Jky(uint8_t x){
  btn_val=digitalRead(jky);   // read pin button
  if (btn_val == LOW && btn_oldVal == HIGH){
      swbtn_state=x;    
      delay(10);   
  }
  btn_oldVal=btn_val;
}

/*- *- *- *- - MENU SYSTEM - -* -* -* -*/
uint8_t M1 = 0; //Memory variable to determine menu state
uint8_t F1 = 0; //Memory variable to determine menu state
uint8_t C1 = 0; //Memory variable to determine menu state

//Mode_options
#define openClose (uint8_t) 1
#define figures (uint8_t)   2
#define custom  (uint8_t)   3

//Figures_options
#define rock (uint8_t)       1
#define ronaldinho (uint8_t) 2
#define point (uint8_t)      3
#define thumbUp (uint8_t)    4
#define goBackF1 (uint8_t)   5

//Custom_options
#define thumb (uint8_t)    1
#define index (uint8_t)    2
#define middle (uint8_t)   3
#define ring (uint8_t)     4
#define pinky (uint8_t)    5
#define wrist (uint8_t)    6
#define goBackC1 (uint8_t) 7

/*---- 1.MODES Menu Methods / All Menu Systems ----*/
/*-- Read Joystic M1 Method --*/
void jkyM1(void){
  if (analogRead(jkyX)<=341 && analogRead(jkyY)>=1010){
    M1 = openClose;
  }
  else if (analogRead(jkyX)>=342 && analogRead(jkyX)<=682 && analogRead(jkyY)>=990){
    M1 = figures;
  }
  else if (analogRead(jkyX)>=683 && analogRead(jkyX)<=1023 && analogRead(jkyY)>=980){
    M1 = custom;
  } 
}

/*---- Modes Screen Methods ----*/
void M1_openClose(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(32, 45, "OPEN/CLOSE");
  
  u8g2.drawBox(8,0,31,31);   //Selected box
  u8g2.drawStr(21,9, "1");   //Selected string
  
  u8g2.drawFrame(47,0,31,31);
  u8g2.drawStr(60,9, "2");
  
  u8g2.drawFrame(86,0,31,31);
  u8g2.drawStr(99,9, "3");
  
  u8g2.sendBuffer();
}
void M1_openClose_in(){
  emg(closeHand); 
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(32, 16, "Squeeze to");
  u8g2.drawStr(32, 32, "CLOSE HAND");
  
  u8g2.sendBuffer();
}
void M1_figures(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(42, 45, "FIGURES");
  
  u8g2.drawFrame(8,0,31,31);   
  u8g2.drawStr(21,9, "1");
  
  u8g2.drawBox(47,0,31,31);   //Selected box
  u8g2.drawStr(60,9, "2");    //Selected string
  
  u8g2.drawFrame(86,0,31,31);
  u8g2.drawStr(99,9, "3");
  
  u8g2.sendBuffer();
}
void M1_custom(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(19, 45, "CUSTOM MOVEMENT");
  
  u8g2.drawFrame(8,0,31,31);   
  u8g2.drawStr(21,9, "1");
  
  u8g2.drawFrame(47,0,31,31);   
  u8g2.drawStr(60,9, "2");
  
  u8g2.drawBox(86,0,31,31);   //Selected box
  u8g2.drawStr(99,9, "3");    //Selected string
  
  u8g2.sendBuffer();
}

//MAIN MENU SYSTEM(MODES) METHOD
void modes_M1(){  
  switch (M1){
    case openClose:
      if(swbtn_state==1){
        M1_openClose_in();
        btn_Jky(0);
      }
      else{
        jkyM1();
        openHand();
        M1_openClose();
        btn_Jky(1);
      }
      break;

    case figures:
      if(swbtn_state==2 || swbtn_state==3){
        figures_F1();
      }
      else{
        jkyM1();
        openHand();
        M1_figures();
        btn_Jky(2);
      }
      break;

    case custom:
      if(swbtn_state==4 || swbtn_state==5){
        custom_C1();
      }
      else{
        jkyM1();
        openHand();
        M1_custom();
        btn_Jky(4);
      }
      break;
  }
}

/*---- 2.FIGURES Menu Methods ----*/
/*-- Read Joystic F1 Method --*/
void jkyF1(void){
  if (analogRead(jkyX)<=150 && analogRead(jkyY)>=1022){
    F1 = rock;
  }
  else if (analogRead(jkyX)>=151 && analogRead(jkyX)<=540 && analogRead(jkyY)>=1022){
    F1 = ronaldinho;
  }
  else if (analogRead(jkyX)>=541 && analogRead(jkyX)<=767 && analogRead(jkyY)>=1022){
    F1 = point;
  }
  else if (analogRead(jkyX)>=768 && analogRead(jkyX)<=1023 && analogRead(jkyY)>=1022){
    F1 = thumbUp;
  }
  else if (analogRead(jkyX)>=400 && analogRead(jkyX)<=1023 && analogRead(jkyY)<=400){
    F1 = goBackF1;
  } 
}

/*---- Figures Screen Methods ----*/
void F1_rock(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(32, 32, "ROCK'N ROLL");
  
  u8g2.drawBox(11,0,17,17);   //Selected box
  u8g2.drawStr(17,2, "1");    //Selected string 
  
  u8g2.drawFrame(39,0,17,17);
  u8g2.drawStr(45,2, "2");
  
  u8g2.drawFrame(67,0,17,17);
  u8g2.drawStr(73,2, "3");
  
  u8g2.drawFrame(95,0,17,17);
  u8g2.drawStr(101,2, "4");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();

}
void F1_rock_in(void){
  emg(rock_servo);
  btn_Jky(2);
  u8g2.clearBuffer();
  
  u8g2.drawStr(32, 16, "Squeeze to");
  u8g2.drawStr(32, 32, "ROCK'N ROLL");
  
  u8g2.sendBuffer();
}
void F1_ronaldinho(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(34, 32, "RONALDINHO");
  
  u8g2.drawFrame(11,0,17,17);
  u8g2.drawStr(17,2, "1");
  
  u8g2.drawBox(39,0,17,17);   //Selected box
  u8g2.drawStr(45,2, "2");    //Selected string
  
  u8g2.drawFrame(67,0,17,17);
  u8g2.drawStr(73,2, "3");
  
  u8g2.drawFrame(95,0,17,17);
  u8g2.drawStr(101,2, "4");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}
void F1_ronaldinho_in(void){
  emg(ronaldinho_servo);
  btn_Jky(2);
  u8g2.clearBuffer();
  
  u8g2.drawStr(32, 32, "RONALDINHO!");
  
  u8g2.sendBuffer();
}
void F1_point(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(49, 32, "POINT");
  
  u8g2.drawFrame(11,0,17,17);
  u8g2.drawStr(17,2, "1");
  
  u8g2.drawFrame(39,0,17,17);     
  u8g2.drawStr(45,2, "2");
  
  u8g2.drawBox(67,0,17,17);   //Selected box
  u8g2.drawStr(73,2, "3");    //Selected string
  
  u8g2.drawFrame(95,0,17,17);
  u8g2.drawStr(101,2, "4");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}
void F1_point_in(void){
  emg(point_servo);
  btn_Jky(2);
  u8g2.clearBuffer();
  
  u8g2.drawStr(32, 16, "Squeeze to");
  u8g2.drawStr(49, 32, "POINT");
  
  u8g2.sendBuffer();
}
void F1_thumbUp(){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(39, 32, "THUMBS UP");
  
  u8g2.drawFrame(11,0,17,17);
  u8g2.drawStr(17,2, "1");
  
  u8g2.drawFrame(39,0,17,17);     
  u8g2.drawStr(45,2, "2");
  
  u8g2.drawFrame(67,0,17,17);     
  u8g2.drawStr(73,2, "3");
  
  u8g2.drawBox(95,0,17,17);     //Selected box
  u8g2.drawStr(101,2, "4");     //Selected string
  
  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}
void F1_thumbUp_in(void){
  emg(thumbsUp_servo);
  btn_Jky(2);
  u8g2.clearBuffer();
  
  u8g2.drawStr(20, 16, "Squeeze to give");
  u8g2.drawStr(32, 30, "a THUMBS UP");
  
  u8g2.sendBuffer();
}
void F1_goBack(void){
  btn_Jky(0);  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(42, 32, "GO BACK");
  
  u8g2.drawFrame(11,0,17,17);
  u8g2.drawStr(17,2, "1");
  
  u8g2.drawFrame(39,0,17,17);     
  u8g2.drawStr(45,2, "2");
  
  u8g2.drawFrame(67,0,17,17);     
  u8g2.drawStr(73,2, "3");
  
  u8g2.drawFrame(95,0,17,17);
  u8g2.drawStr(101,2, "4");    

  u8g2.drawBox(115,51,12,10);   //Selected box
  
  u8g2.setDrawColor(0);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

//MAIN FIGURES METHOD
void figures_F1(){
  switch (F1){
    case rock:
      if(swbtn_state==3){ //s'ha de canviar!!
        F1_rock_in();
      }
      else{
        btn_Jky(3);
        jkyF1();
        F1_rock();  //print on display F1_rock
      }
      break;
    
    case ronaldinho: 
      if(swbtn_state==3){ //s'ha de canviar!!
        F1_ronaldinho_in(); 
      }
      else{
        btn_Jky(3);
        jkyF1();
        F1_ronaldinho(); //print on display F1_ronaldinho
      }
      break;
    
    case point:
      if(swbtn_state==3){ //s'ha de canviar!!
        F1_point_in(); 
      }
      else{
        btn_Jky(3);
        jkyF1();
        F1_point(); //print on display F1_ronaldinho
      }
      break;

     case thumbUp:
      if(swbtn_state==3){ //s'ha de canviar!!
        F1_thumbUp_in(); 
      }
      else{
        btn_Jky(3);
        jkyF1();
        F1_thumbUp(); //print on display F1_ronaldinho
      }
      break;

     case goBackF1:
        jkyF1();
        F1_goBack(); //print on display F1_ronaldinho
      break;
  }
}

/*---- 3.CUSTOM Menu Methods ----*/
/*-- Read Joystic C1 Method --*/
void jkyC1(void){
  if (analogRead(jkyX)<=170 && analogRead(jkyY)>=1023){
    C1 = thumb;
  }
  else if (analogRead(jkyX)>=171 && analogRead(jkyX)<=341 && analogRead(jkyY)>=1023){
    C1 = index;
  }
  else if (analogRead(jkyX)>=342 && analogRead(jkyX)<=511 && analogRead(jkyY)>=1023){
    C1 = middle;
  }
  else if (analogRead(jkyX)>=512 && analogRead(jkyX)<=682 && analogRead(jkyY)>=1023){
    C1 = ring;
  }
  else if (analogRead(jkyX)>=683 && analogRead(jkyX)<=853 && analogRead(jkyY)>=1023){
    C1 = pinky;
  }
  else if (analogRead(jkyX)>=854 && analogRead(jkyX)<=1023 && analogRead(jkyY)>=1023){
    C1 = wrist;
  }
  else if (analogRead(jkyX)>=512 && analogRead(jkyX)<=1023 && analogRead(jkyY)<=450){
    C1 = goBackC1;
  }
}
/*-- Movement State for Individual Fingers Method --*/
uint8_t movement=0;
void jky_servo_movement(void){
    if(analogRead(jkyY)>=600){
        movement=1;
    }
    else if(analogRead(jkyY)<=400){
        movement=2;
    }
    else if(analogRead(jkyY)>=401 && analogRead(jkyY)<=599){
        movement=0;
    }
}

/*---- Custom Screen Methods ----*/
void C1_thumb(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(49, 32, "THUMB");
  
  u8g2.drawBox(2,0,17,17);   //Selected box
  u8g2.drawStr(8,2, "1");    //Selected string
  
  u8g2.drawFrame(23,0,17,17);
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawFrame(44,0,17,17);
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

#define thumbMin 13
#define thumbMax 170
uint8_t thumb_angle=13;
uint8_t thumb_percentage=0;

void C1_thumb_in(void){
    jky_servo_movement();
    btn_Jky(4);
    if(movement==1 && thumb_angle<thumbMax){
        thumb_angle++;
    }
    else if(movement==2 && thumb_angle>thumbMin){
        thumb_angle--;
    }
    setServo(0,thumb_angle);
    thumb_percentage=map(thumb_angle, thumbMin, thumbMax, 0, 100);
    String percentage = String(thumb_percentage);
  
    u8g2.clearBuffer();
    u8g2.setDrawColor(2);
  
    u8g2.drawStr(16, 0, "Adjust Position");

    u8g2.drawStr(12,24, "Thumb:");
    u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
    u8g2.drawStr(82,24, "%");
    
    u8g2.drawFrame(12,40,102,17);
    u8g2.drawBox(13,41,thumb_percentage,15);   //x is percentage of map
    
    u8g2.sendBuffer();
  
}
void C1_index(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(49, 32, "INDEX");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawBox(23,0,17,17);   //Selected box
  u8g2.drawStr(29,2, "2");     //Selected string
  
  u8g2.drawFrame(44,0,17,17);
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);

  u8g2.sendBuffer();
}

#define indexMin 10
#define indexMax 170
uint8_t index_angle=10;
uint8_t index_percentage=0;

void C1_index_in(){
  jky_servo_movement();
  btn_Jky(4);
  if(movement==1 && index_angle<indexMax){
      index_angle++;
  }
  else if(movement==2 && index_angle>indexMin){
      index_angle--;
  }
  setServo(1,index_angle);
  index_percentage=map(index_angle, indexMin, indexMax, 0, 100);
  String percentage = String(index_percentage);
  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(16, 0, "Adjust Position");

  u8g2.drawStr(12,24, "Index:");
  u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
  u8g2.drawStr(82,24, "%");
    
  u8g2.drawFrame(12,40,102,17);
  u8g2.drawBox(13,41,index_percentage,15);   //x is percentage of map
    
  u8g2.sendBuffer();
}
void C1_middle(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(47, 32, "MIDDLE");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawFrame(23,0,17,17);   
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawBox(44,0,17,17);   //Selected box
  u8g2.drawStr(50,2, "3");    //Selected string
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

#define middleMin 13
#define middleMax 175
uint8_t middle_angle=13;
uint8_t middle_percentage=0;

void C1_middle_in(void){
  jky_servo_movement();
  btn_Jky(4);
  if(movement==1 && middle_angle<middleMax){
      middle_angle++;
  }
  else if(movement==2 && middle_angle>middleMin){
      middle_angle--;
  }
  setServo(2,middle_angle);
  middle_percentage=map(middle_angle, middleMin, middleMax, 0, 100);
  String percentage = String(middle_percentage);
  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(16, 0, "Adjust Position");

  u8g2.drawStr(12,24, "Middle:");
  u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
  u8g2.drawStr(82,24, "%");
    
  u8g2.drawFrame(12,40,102,17);
  u8g2.drawBox(13,41,middle_percentage,15);   //x is percentage of map
    
  u8g2.sendBuffer();
}
void C1_ring(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(52, 32, "RING");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawFrame(23,0,17,17);   
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawFrame(44,0,17,17);
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawBox(65,0,17,17);   //Selected box
  u8g2.drawStr(71,2, "4");    //Selected string
  
  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

#define ringMin 13
#define ringMax 151
uint8_t ring_angle=13;
uint8_t ring_percentage=0;

void C1_ring_in(void){
  jky_servo_movement();
  btn_Jky(4);
  if(movement==1 && ring_angle<ringMax){
      ring_angle++;
  }
  else if(movement==2 && ring_angle>ringMin){
      ring_angle--;
  }
  setServo(3,ring_angle);
  ring_percentage=map(ring_angle, ringMin, ringMax, 0, 100);
  String percentage = String(ring_percentage);
  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(16, 0, "Adjust Position");

  u8g2.drawStr(12,24, "Ring:");
  u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
  u8g2.drawStr(82,24, "%");
    
  u8g2.drawFrame(12,40,102,17);
  u8g2.drawBox(13,41,ring_percentage,15);   //x is percentage of map
    
  u8g2.sendBuffer();
}
void C1_pinky(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(49, 32, "PINKY");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawFrame(23,0,17,17);   
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawFrame(44,0,17,17);   
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawBox(86,0,17,17);   //Selected box
  u8g2.drawStr(92,2, "5");    //Selected string

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

#define pinkyMin 13
#define pinkyMax 161
uint8_t pinky_angle=13;
uint8_t pinky_percentage=0;

void C1_pinky_in(void){
  jky_servo_movement();
  btn_Jky(4);
  if(movement==1 && pinky_angle<pinkyMax){
      pinky_angle++;
  }
  else if(movement==2 && pinky_angle>pinkyMin){
      pinky_angle--;
  }
  setServo(4,pinky_angle);
  pinky_percentage=map(pinky_angle, pinkyMin, pinkyMax, 0, 100);
  String percentage = String(pinky_percentage);
  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(16, 0, "Adjust Position");

  u8g2.drawStr(12,24, "Pinky:");
  u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
  u8g2.drawStr(82,24, "%");
    
  u8g2.drawFrame(12,40,102,17);
  u8g2.drawBox(13,41,middle_percentage,15);   //x is percentage of map
    
  u8g2.sendBuffer();
}
void C1_wrist(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(49, 32, "WRIST");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawFrame(23,0,17,17);   
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawFrame(44,0,17,17);   
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawBox(107,0,17,17);    //Selected box
  u8g2.drawStr(113,2, "6");     //Selected string

  u8g2.drawFrame(115,51,12,10);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  
  u8g2.sendBuffer();
}

#define wristMin 180
#define wristMax 150
uint8_t wrist_angle=180;
uint8_t wrist_percentage=0;

void C1_wrist_in(void){
  jky_servo_movement();
  btn_Jky(4);
  if(movement==1 && wrist_angle>wristMax){
      wrist_angle--;
  }
  else if(movement==2 && wrist_angle<wristMin){
      wrist_angle++;
  }
  setServo(5,wrist_angle);
  wrist_percentage=map(wrist_angle, wristMin, wristMax, 0, 100);
  String percentage = String(wrist_percentage);
  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(16, 0, "Adjust Position");

  u8g2.drawStr(12,24, "Wrist:");
  u8g2.drawStr(64,24, percentage.c_str());   //map variable for %
  u8g2.drawStr(82,24, "%");
    
  u8g2.drawFrame(12,40,102,17);
  u8g2.drawBox(13,41,wrist_percentage,15);   //x is percentage of map
    
  u8g2.sendBuffer();
}
void C1_goBack(void){  
  u8g2.clearBuffer();
  u8g2.setDrawColor(2);
  
  u8g2.drawStr(43, 32, "GO BACK");
  
  u8g2.drawFrame(2,0,17,17);   
  u8g2.drawStr(8,2, "1");
  
  u8g2.drawFrame(23,0,17,17);   
  u8g2.drawStr(29,2, "2");
  
  u8g2.drawFrame(44,0,17,17);   
  u8g2.drawStr(50,2, "3");
  
  u8g2.drawFrame(65,0,17,17);
  u8g2.drawStr(71,2, "4");

  u8g2.drawFrame(86,0,17,17);
  u8g2.drawStr(92,2, "5");

  u8g2.drawFrame(107,0,17,17);
  u8g2.drawStr(113,2, "6");
  
  u8g2.drawBox(115,51,12,10);   //Selected box
  
  u8g2.setDrawColor(0);
  u8g2.drawXBMP(117, 53, 8, 6, back);
  u8g2.sendBuffer();
}

//MAIN CUSTOM METHOD
void custom_C1(void){
  switch(C1){
    case thumb:
      if(swbtn_state==5){
        jky_servo_movement();
        C1_thumb_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_thumb();  //print on display F1_rock
      }
      break;
    
    case index:
      if(swbtn_state==5){ //s'ha de canviar!!
        C1_index_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_index();  //print on display F1_rock
      }
      break;
    
    case middle:
      if(swbtn_state==5){ //s'ha de canviar!!
        C1_middle_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_middle();  //print on display F1_rock
      }
      break;

    case ring:
      if(swbtn_state==5){ //s'ha de canviar!!
        C1_ring_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_ring();  //print on display F1_rock
      }
      break;
    
    case pinky:
      if(swbtn_state==5){ //s'ha de canviar!!
        C1_pinky_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_pinky();  //print on display F1_rock
      }
      break;

    case wrist:
      if(swbtn_state==5){ //s'ha de canviar!!
        C1_wrist_in();
      }
      else{
        btn_Jky(5);
        jkyC1();
        C1_wrist();  //print on display F1_rock
      }
      break;

    case goBackC1:
        btn_Jky(0);
        jkyC1();
        C1_goBack();  //print on display F1_rock
      break;
  }
}

void setup(){
  u8g2.begin();
  u8g2_prepare();
  servo.begin();
  servo.setPWMFreq(Freq);
  pinMode(jky, INPUT_PULLUP);
  F1=rock;
  C1=thumb;
  M1=openClose;
  swbtn_state=0;
}

void loop(){ 
  modes_M1();
}

#include<iostream>
using namespace std;

int sum(int arr[], int a);

int main() {
    int arr[1000], n;
    cin >> n;
    for (int i = 0; i < n; ++i) {
        cin >> arr[i];
        cout << sum(arr, n);
    }
}
int sum(int arr[], int a) {
    int i;
    sum = 0;
    for (i=0; i<n; ++i) {
        sum += arr[i];
    }
    return sum;
}#include<iostream>
using namespace std;

int sum(int arr[], int a);

int main() {
    int arr[1000], n;
    cin >> n;
    for (int i = 0; i < n; ++i) {
        cin >> arr[i];
        cout << sum(arr, n);
    }
}
int sum(int arr[], int a) {
    int i;
    sum = 0;
    for (i=0; i<n; ++i) {
        sum += arr[i];
    }
    return sum;
}

#include <iostream>
#include<cmath>
#include<ctime>
#include<string>
#include <iomanip>
#include <fstream>

using namespace std;

int main()
{
	cout << "enter the year ";
	int year;
	cin >> year;
	
	cout << "Enter The First Day Of The year ";
	int FirstDay;
	cin >> FirstDay;
	int count = 1;
	int days = 1;
	for (int month = 1; month <= 12; month++)
	{
		cout << "             ";
		switch (month)
		{
		case 1: cout << "January " << year<<endl;
			break;
		case 2: cout << "February " << year << endl;
			break;
		case 3: cout << "March  " << year << endl;
			break;
		case 4: cout << "April  " << year << endl;
			break;
		case 5: cout << "May " << year << endl;
			break;
		case 6: cout << "June  " << year << endl;
			break;
		case 7: cout << "July  " << year << endl;
			break;
		case 8: cout << "August " << year << endl;
			break;
		case 9: cout << "September " << year << endl;
			break;
		case 10: cout << "October " << year << endl;
			break;
		case 11: cout << "November " << year << endl;
			break;
		case 12: cout << "December " << year << endl;
			break;
		}
		cout << " --------------------------------------------------------- "<<endl;
		cout << "  Sun Mon Tue Wed Thu Fri Sat"<<endl;
		for (int i = 0; i < FirstDay; i++)
		{
			cout << "    ";
		}
		for (int i = 1; i < 31; i++)
		{
			if (i < 10) {
				cout<<"   " <<i;
			}
			else {
				cout<<"  " << i;
			}
			if ((i + FirstDay) % 7 == 0) {
				cout << endl;
			}
		}
		cout << endl;

		FirstDay = (FirstDay + 31) % 7;
		
	}
	
	
}

	
	

#include <iostream>
#include<cmath>
#include<ctime>
#include<string>
#include <iomanip>
#include <fstream>

using namespace std;

int main()
{
	cout << "enter the month ";
	int month;
	cin >> month;
	cout << "Enter The First Day Of The Month ";
	int firstDay;
	cin >> firstDay;
	int nextSunday = 1;
	
		switch (firstDay)
		{
			
		case 1: nextSunday += 7;
			cout << "The first day of this month is sunday "<<endl;
			while (nextSunday < 30)
			{
					cout << "Next Sunday of this month is on " << nextSunday << endl;
									nextSunday += 7 ;
			}
			break;

		case 2: nextSunday += 6;
			cout << "The first day of this month is monday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;
		case 3: nextSunday += 5;
			cout << "The first day of this month is tuesday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;
		case 4: nextSunday += 4;
			cout << "The first day of this month is wednesday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;
		case 5: nextSunday += 3;
			cout << "The first dayof this month is thursday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;
		case 6: nextSunday += 2;
			cout << "The first day of this month is friday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;
		case 7: nextSunday += 1;
			cout << "The first day of this month is saturday " << endl;
			while (nextSunday < 30)
			{
				cout << "Next Sunday of this month is on " << nextSunday << endl;
				nextSunday += 7;
			}
			break;

		}
		
}

	
	

int maxSubArraySum(int a[], int size) 
{ 
int max_so_far = 0, max_ending_here = 0; 
for (int i = 0; i < size; i++) 
{ 
	max_ending_here = max_ending_here + a[i]; 
	if (max_ending_here < 0) 
		max_ending_here = 0; 

	/* Do not compare for all elements. Compare only 
		when max_ending_here > 0 */
	else if (max_so_far < max_ending_here) 
		max_so_far = max_ending_here; 
} 
return max_so_far; 
} 

class Solution{
    public:
    //Function to find if there exists a triplet in the 
    //array A[] which sums up to X.
    bool find3Numbers(int A[], int n, int X)
    {
        //Your Code Here
         int j;
    int k;
    //Your Code Here
    sort(A,A+n);
    for(int i=0;i<n-2;i++)
    {
       j=i+1;
       k=n-1;
       while(j<k)
       {
         if(A[i]+A[j]+A[k]==X) return 1;
         if(A[i]+A[j]+A[k]>X) k--;
         else j++;
       }
    }
    return 0;
    }

};

vector<vector<int> > Solution::threeSum(vector<int> &A) {
    vector<int>v1;
    set<vector<int>>s;
    int n=A.size();
    sort(A.begin(),A.end());
    for(int i=0;i<n-2;i++)
    {
        int j=i+1;
        int k=n-1;
        while(j<k)
        {  
            long long sum = 0LL+A[i]+A[j]+A[k];
            if(sum==0)
            {
            v1.push_back(A[i]);
            v1.push_back(A[j]);
            v1.push_back(A[k]);
            s.insert(v1);
            v1.clear();
            }
            if(A[i]+A[j]+A[k]<0) j++;
            else k--; 
        }
        
    }
    vector<vector<int>>v2(s.begin(),s.end());
    return v2;
}

#include <bits/stdc++.h>
using namespace std;

class base
{
   public:
   int x;
   void show()
   {
      cout<<x<<"\n";
   }
};

class derived:public base       //Inheritance
{
   public:
   int y;
   
   void display()
   {
      cout<<x<<" "<<y<<"\n";
   }
};
int main()
{
	base b;
	b.x=4;
	b.show();
	derived d;
	d.x=10;
	d.y=5;
	d.show();
	d.display();
	
	return 0;
}

#include <bits/stdc++.h>
using namespace std;

class Complex
{
   public:
    int real;
    int img;
   
   Complex(int r=0,int i=0)
   {
      real=r;
      img=i;
   }
   friend Complex operator+(Complex c1,Complex c2);  //friend 
   void display()                          //operator overloading
   {
      
   }
};
Complex operator+(Complex c1,Complex c2)  //operator overloading
    {
      Complex temp;
      temp.real=c1.real+c2.real;
      temp.img=c1.img+c2.img;
      return temp;
    }
int main()
{
   Complex c1(2,5),c2(3,5),c3;
   
   c3=c1+c2;
   cout<<c3.real<<"+i"<<c3.img<<endl;
	return 0;
}

#include <bits/stdc++.h>
using namespace std;

class Complex
{
   public:
    int real;
    int img;
   
   Complex(int r=0,int i=0)
   {
      real=r;
      img=i;
   }
   Complex operator+(Complex c)  //operator overloading or
    {                            //(Complex add(Complex c)
      Complex temp;
      temp.real=real+c.real;
      temp.img=img+c.img;
      return temp;
    }
};
int main()
{
   Complex c1(2,5),c2(3,5),c3;
   
   c3=c1+c2;                     // or c3=c1.add(c2);
   cout<<c3.real<<"+i"<<c3.img<<endl;
	return 0;
}

//There have 3 constructors with same name called overloading
                  

#include <bits/stdc++.h>
using namespace std;
class rectangle             //class
{
   private:
   int length;
   int breadth;
   public:
   
   rectangle()              //non-parameterised constructor
   {
      length=5;
      breadth=4;
   }
   rectagle(int l=5,int b)        //parameterised constructor
   {
      setLength(l);
      setBreadth(b);
   }
   rectangle(rectangle &r)       //copy constructor
   {
      length=r.length;
      breadth=r.breadth;
   }
   void setLength(int l)
   {
      if(l>0) length=l;
      else length=1;
   }
   void setBreadth(int b)
   {
      if(b>0) breadth=b;
      else breadth=1;
   }
   int getLength()
   {
      return length;
   }
   int getBreadth();     //Define outside class with scope resolution

   int area()
   {
      return length*breadth;
   }
   int perimeter();      //Define outside class with scope resolution
};

int rectangle::perimeter()   //Define outside class with scope            {                                    // resolution
      return 2*(length+breadth);
     }
                            
  
int rectangle::getBreadth()   //Define outside class with scope          {                                  //resolution
      return breadth;
   }

int main()
{
rectangle r1;                 //object r1
r1.setLength(15);
r1.setBreadth(2);
rectangle r2(r1);             //object r2
cout<<r1.area()<<"\n";
cout<<r1.perimeter()<<"\n";
cout<<r2.perimeter()<<"\n";
	return 0;
}