/*
Calculator
*/

#include<stdio.h>
#include<stdlib.h>

int main()
{
    int sel,n1,n2;
    
    printf("Enter 2 nos");
    scanf("%d %d",&n1,&n2);
    
    do{
        printf("1:Add\n2:Subtract\n3:Exit\n");
        scanf("%d",&sel);
        
        if(sel==1)
        	printf("Ans=%d\n",n1+n2);
        
        if(sel==2)
        	printf("Ans=%d\n",n1-n2);
    }while(sel!=3);
        
}