1022

#include
#include
#include
#include


using namespace std;

string to_radix(const long long &n,long long d)
{
    string ret;
    long long result = n / d;
    long long reminder = n%d;

    while (result > 0)
    {
        ret += to_string(reminder);
        reminder = result%d;
        result = result / d;
    }
    ret += to_string(reminder);

    string out_ret(ret.rbegin(),ret.rend());
    return out_ret;
}

int main()
{
    long long a, b,d;
    cin >> a >> b >> d;

    string result_of_radix = to_radix((a+b),d);

    cout << result_of_radix;

    cout << endl;
    system("pause");
    return 0;
}

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