#include <bits/stdc++.h>
using namespace std;
int main(){
// #ifndef TESTING
// freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
// #endif
int curr, target;
cin >> curr >> target;
int minimum = target - curr;
if(minimum > 180){
minimum -= 360;
} else if(minimum < -180){
minimum += 360;
} else if(minimum == -180){
minimum = 180;
}
cout << minimum;
return 0;
}