백준 알고리즘 23811번 : 골뱅이 찍기 - ㅌ

링크

https://www.acmicpc.net/problem/23811

sol1) 구현

#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define fastio ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define int int64_t
using namespace std;

int32_t main(){
  fastio;
  int n; cin >> n;
  const int sz = 5*n;
  for(int i = 1; i <= sz; i++){
    for(int j = 1; j <= sz; j++){
      if(j <= n || i <= n || i >= sz - n + 1 || (sz - 3 *n + 1 <= i && i <= sz - 2 * n)) cout << "@";
    }
    cout << "\n";
  }
}