BOJ 19774 - ABCD-код [C++]

문제

링크

풀이

#include <iostream>
using namespace std;
 
bool solve(void) {
  int n; cin >> n;
 
  return ((n/100)*(n/100)+(n%100)*(n%100)) % 7 == 1;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int t; cin >> t;
  while (t--) cout << (solve() ? "YES" : "NO") << "\n";
  return 0;
}