#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
 
int main() {
    long long X;
    int N;
    cin >> X >> N;
    if (X == 0) {
        cout << 0 << endl;
        return 0;
    }
    string result;
    while (X > 0) {
        long long remainder = X % N;
        if (remainder < 10) {
            result += (char)('0' + remainder);
        } else {
            result += (char)('A' + remainder - 10);
        }
        X = X / N;
    }
    reverse(result.begin(), result.end());
    cout << result << endl;
    return 0;
}