#include <iostream>
using namespace std;

int main() {
    int m;
    while (cin >> m) {
        if (m == 0) break;
        long long a, b;
        cin >> a >> b;
        long long sum = a + b;
        string ans;
        if (sum == 0) ans = "0";
        while (sum != 0) {
            ans = to_string(sum % m) + ans;
            sum /= m;
        }
        cout <<ans<< endl;
    }
}
// 64 位输出请用 printf("%lld")