Checks If a digit is repeated in a number

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Sat Nov 16 2024 09:35:35 GMT+0000 (Coordinated Universal Time)

Saved by @khadizasultana #loop #c #array

// Author : Khadiza Sultana
#include<stdio.h>
#include<stdbool.h>
int main(){
    bool digit_seen[10] = {false};
    int digit;
    long n;
    printf("Enter a number : ");
    scanf("%ld", &n);
    while(n > 0){
        digit = n % 10;
        if(digit_seen[digit])
           break;
        digit_seen[digit] = true;
        n /= 10;
    }
    if(n > 0){
        printf("Repeated digit \n");
    }
    else{
        printf("No repeated digit \n");
    }
    return 0;
}

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Adding two matrices

class Solution
{
    //Function to add two matrices.
    static int[][] sumMatrix(int A[][], int B[][])
    {
        int n = A.length, m = A[0].length;
        int res[][] = new int[0][0];
        //Check if two input matrix are of different dimensions
        if(n != B.length || m != B[0].length)
            return res;
        
        res = new int[n][m];
        for(int i=0;i<n;i++)
            for(int j=0;j<m;j++)
                res[i][j] = A[i][j] + B[i][j];
                
        return res;
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #sum

Sum of upper and lower triangles

class Solution
{
    //Function to return sum of upper and lower triangles of a matrix.
    static ArrayList<Integer> sumTriangles(int matrix[][], int n)
    {
        ArrayList<Integer> list=new ArrayList<>();
        int sum1=0;
        int sum2=0;
        for(int g=0; g<matrix.length; g++){
            for(int i=0, j=g; j<matrix.length; i++,j++){
                sum1+=matrix[i][j];
            }
        }
        list.add(sum1);
        for(int g=0; g<matrix.length; g++){
            for(int i=g,j=0; i<matrix.length; i++,j++){
                sum2+=matrix[i][j];
            }
        }
        list.add(sum2);
        return list;
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #multiplication

Multiply the matrices

class Solution
{
    //Function to multiply two matrices.
    static int[][] multiplyMatrix(int A[][], int B[][])
    {
        int n1 = a.length;
        int m1 = a[0].length;
        int n2 = b.length;
        int m2 = b[0].length;
        
        if(m1!=n2)
        {
            int arr0[][] = new int[1][1];
            arr0[0][0] = -1;
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        }
        
        int arr[][] = new int[n1][m2];
        
        for(int i = 0 ; i<n1 ; i++)
        for(int j = 0 ; j<m2 ; j++)
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        arr[i][j]+= a[i][q]*b[q][j];
        
        return arr;
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #determinant

Determinant of a Matrix

class Solution
{
    //Function to get cofactor of matrix[p][q] in temp[][]. 
    static void getCofactor(int matrix[][], int temp[][], int p, int q, int n)
    {
        int i = 0, j = 0;

        for (int row = 0; row < n; row++)
        {
            for (int col = 0; col < n; col++)
            {
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                if(row != p && col != q)
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                    //if row is filled, we increase row index and
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                    if(j == n - 1)
                    {
                        j = 0;
                        i++;
                    }
                }
            }
         }
    }
    
    
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    static int determinantOfMatrix(int matrix[][], int n)
    {
        int D = 0; 

        //base case
        if (n == 1)
            return matrix[0][0];

        //creating a list to store Cofactors.
        int temp[][]  = new int[n][n];

        int sign = 1;

        //iterating for each element of first row.
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        {
            //getting Cofactor of matrix[0][i].
            getCofactor(matrix, temp, 0, i, n);
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            //terms are to be added with alternate sign so changing the sign.
            sign = -sign;
        }
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        return D;
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #exchangecolumns

Exchange matrix columns

class Solution
{
    //Function to exchange first column of a matrix with its last column.
    static void exchangeColumns(int matrix[][])
    {
       int temp = 0;
       for (int i=0; i<matrix.length; i++)
       {
            temp = matrix[i][0];
            matrix[i][0] = matrix[i][matrix[i].length-1];
            matrix[i][matrix[i].length-1] = temp; 
       }
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #reversingcolumns

Reversing the columns of a Matrix

class Solution
{
    //Function to reverse the columns of a matrix.
    static void reverseCol(int matrix[][])
    {
       for(int i=0; i<matrix.length; i++){
           for(int j=0; j<matrix[i].length/2; j++)
           {
               int temp = matrix[i][j];
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               matrix[i][matrix[i].length-j-1] = temp;
           }
       } 
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #interchangingrows

Interchanging the rows of a Matrix

class Solution
{
    //Function to interchange the rows of a matrix.
    static void interchangeRows(int matrix[][])
    {
       for(int i=0;i<matrix.length/2;i++){
           for(int j=0;j<matrix[i].length;j++){
               int temp=matrix[i][j];
               matrix[i][j]=matrix[matrix.length-i-1][j];
               matrix[matrix.length-i-1][j]=temp;
           }
       } 
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #booleanmatrix

Boolean Matrix

class Solution
{
    //Function to modify the matrix such that if a matrix cell matrix[i][j]
    //is 1 then all the cells in its ith row and jth column will become 1.
    void booleanMatrix(int matrix[][])
    {
        int r = matrix.length;
        int c = matrix[0].length;

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        int col[] = new int[c];
        
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                if(row[i] == 1 || col[j] == 1){
                    matrix[i][j] = 1;
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            }
        }
    }
}

#java #gfg #geeksforgeeks #2d #array #matrix #practice #beautifulmatrix

Make Matrix Beautiful

class Solution 
{
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        int sumCol[] = new int[n];
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            maxSum = Math.max(maxSum, sumRow[i]);
            maxSum = Math.max(maxSum, sumCol[i]);
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#javascript #convertir #array #.split() #.join() #.reverse()

Voltear palabras

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

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#c++ #dsa #recursion #sorting #array #arraysorting #bubblesorting

bubble sorting of the array using recursion.

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how to find an element in array of object with streams

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How to clear item not input when count frequency use Dictionary C#

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Getting First and Last Items in Array (and splitting all the rest)

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Checks If a digit is repeated in a number

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