CPZT ACGO

不会的都看我！
100%AC！
点个关注！

#include <iostream>
using namespace std;
int calculateDay(int a, int b) {
    long long sum = 1;
    for(int i = 0; i < b; i++){
        sum *= a;
        sum %= 7;
    }
    return sum;
}
int main() {
    int a,b;
    cin >> a >> b;
    int sum = calculateDay(a,b);
    cout << sum;
    return 0;
}