#include <stdio.h>

int main() {
    int m, a, b;
    while (scanf("%d %d %d", &m, &a, &b) != EOF) {
        if (m == 0) {
            return 0;
        }
        long long num = a + b;

        int result[200000];
        int resTop = 0;
        if (num == 0) {
            result[resTop++] = 0;
        }
        while (num != 0) {
            result[resTop++] = num % m;
            num /= m;
        }
        for (int i = resTop - 1; i >= 0; i--) {
            printf("%d", result[i]);
        }
        printf("\n");
    }
    return 0;
}