文件目录

#include <iostream>
using namespace std;
int main()
{
    int n, r;
    cin >> n >> r;
    char c[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    string ans = "";
    while (n)
    {
        ans = c[n % r] + ans;
        n /= r;
    }
    cout << ans;
    return 0;
}