#include<stdio.h>
int main(){
    int angle1,angle2,thirdangle;
    scanf("%d %d",&angle <0 || angle1+angle2>180){
        if(angle1 < 0 || angle2 < 0 || angle1+angle2 > 180){
            printf("Invalid input");
    } 
    else
    {
        thirdangle = 180 - (angle1+angle2);
        printf("%D",thirdangle);
    }
    return 0;
    }