my source is :
#include<iostream.h>
void main()
{int a,b;
cin>>a>>b;
cout<<a+b<<endl;}

> {int a,b;
AFAIK these should be longs.

On some systems you should also write "int main {... return(0);}" to
get no Runtime Error when the program finishes running.
In some tasks, e.g 1022, you should output NO eoln at the end of
output.