#include<iostream>
#include<string>
#include<vector>
using namespace std;
//习题6.2 又一版A+B
int main()
{
int m, a, b;
long long res;
while (cin >> m) {
if (m == 0) {
break;
}
cin >> a >> b;
res = a + b;
if (res == 0) {
cout << 0 << endl;
continue;
}
vector<int> nums;
while (res != 0) {
nums.push_back(res % m);
res /= m;
}
for (int i = nums.size() - 1; i >= 0; i--) {
cout << nums[i];
}
cout << endl;
}
return 0;
}

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