#include <bits/stdc++.h>   using namespace std;   long long i, j, t, n, k, a, b;   double v;   string line;   char s[4];   int main() {     while (cin >> n >> a >> b) {       if (b < 0) b = n + b;       a = a + b;       a = a % n;       if (a == 0)         a = n;       else if (a < 0)         a = n + a;       cout << a;       cout << endl;     }     return 0;   }   