C++ :

#include <iostream>
using namespace std;

long long quick_pow(long long a, long long b, long long p) {
    long long result = 1;
    a = a % p;
    while (b > 0) {
        if (b % 2 == 1) {
            result = (result * a) % p;
        }
        a = (a * a) % p;
        b = b / 2;
    }
    return result;
}

int main() {
    long long a, b, p;
    cin >> a >> b >> p;
    cout << quick_pow(a, b, p) << endl;
    return 0;
}