C :

#include<stdio.h>
int main()
{int a,b;
while(scanf("%d%d",&a,&b)!=EOF)
printf("%d\n",a+b);
return 0;
}

C++ :

#include <iostream>
using namespace std;

int main() {
    int a,b,c;
    cin>>a>>b;
    c=a+b;
    cout<<c<<endl;
    
    return 0;
}

Pascal :

program li;
var
  a,b:longint;
begin
  read(a,b);
  writeln(a+b);
end.