BOJ 32981 - 찐 Even Number [C++]

문제

링크

풀이

#include <iostream>
#define MOD 1000000007
using namespace std;
 
long long power(long long base, long long exp) {
  long long ret = 1;
  while (exp) {
    if (exp & 1) ret = ret * base % MOD;
    base = base * base % MOD;
    exp >>= 1;
  }
  return ret;
}
 
long long solve(void) {
  int n; cin >> n;
 
  if (n == 1) return 5;
  else return 4 * power(5, n-1) % MOD;
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  int q; cin >> q;
  while (q--) cout << solve() << "\n";
  return 0;
}