#include<stdio.h>
#include<conio.h>
void main()
{
    int a; //declaration
    a=10; //assign
    
    int b;
    b=20;
    
    int c,d,e,f;
    c=a+b;
    d=a-b;
    e=a*b;
    f=a/b;
    printf("%d %d %d %d",c,d,e,f);
    
}