测试点

程序：

#include<bits/stdc++.h>
using namespace std;
long long a, b;
int main() {
	cin >> a >> b;
	for (int i = 1; i < b; i++) {
		a = a * a%7;
	}
	if (a  == 0) {
		cout << "Sunday";
	}
	if (a  ==1) {
		cout << "Monday";
	}
	if (a  ==  2) {
		cout << "Tuesday";
	}
	if (a  ==3 ) {
		cout << "Wednesday";
	}
	if (a  == 4) {
		cout << "Thursday";
	}
	if (a  ==5 ) {
		cout << "Friday";
	}
	if (a  == 6) {
		cout << "Saturday";
	}
	return 0;
}

求指教！