大佬求助QwQ (必互关）

#include<bits/stdc++.h>
using namespace std;

int main () {
	int n, a, sum = 0;
	cin >> n;
	for ( int i = 1; i <= n; i++ ) cin >> a;
	while ( a > 0 ) {
		sum += a % 10;
		a /= 10;
	}
	for ( int i = 1; i <= n; i++ ) {
		if ( sum % 7 == 0 ) cout << "Yes";
		else cout << "No";
	}
	return 0;
}