#include<iostream>
#include<cstdio>
#include<vector>
using namespace std;
int main() {
int m, A, B;
while (scanf("%d", &m) != EOF) {
if (m == 0) {
break;
}
scanf("%d%d", &A, &B);
long long number = A + B;
vector<int> resultant;
if (number != 0) {
while (number != 0) {
resultant.push_back(number % m);
number /= m;
}
for (int i = resultant.size() - 1; i >= 0; --i) {
printf("%d", resultant[i]);
}
}
else{
printf("0");
}
printf("\n");
}
return 0;
}

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