#include<stdio.h>
int main()
{
    int a,b,c;
    if(scanf("%d %d", &a, &b)!= 2)
    return 0
    if(a <=0 || b<=180 || (a+b) >180)
        printf("Invalid input");
    else
    {
        c = 180-(a+b);
        printf("%d",c);
    }
    return 0;
    
}