백준 2164 카드2 c++

[문제 링크]

https://www.acmicpc.net/problem/2164

[입출력 예]

입력	출력
6	4

[소스코드]

#include <iostream>
#include <string>
#include <queue>
#define endl '\n'
using namespace std;
 
int main(void) {
  ios::sync_with_stdio(0);
  cin.tie(0);
  queue<int> Q;
 
  int n;
  cin>>n; // n 입력받음.
 
  for(int i=1; i<=n; i++){
    Q.push(i);
  }
  while(Q.size()!=1){
    Q.pop();
    Q.push(Q.front());
    Q.pop();
  }
  cout<<Q.front();
  return 0;
}