#include<stdio.h>
int main(){
    int first, second;
    if(scanf("%d %d", &first, &second) != 2){
        printf("Invalid input");
        return 0;
    }
    if(first < 0 || second < 0 || first < -1000 || first > 1000 || second < -1000 || second > 1000){
        printf("Invalid input");
        return 0;
    }
    printf("%d", first + second);
    return 0;
    }
}