#include<stdio.h>
int main()
{
    int react1, react2;
    if (scanf("%d", &react1) !=1, scanf("%d", &react2) !=1)
    {
        printf("Invalid input");
        return 0;
    }
    if (react1<0 , react2<0, react1<-1000, react>1000, react2<-1000, react2>1000)
    {
        printf("Invalid input");
        return 0;
    }
    int total = react1+react2;
    printf("%d", total);
    return 0;
}