제출 #617401

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
617401		Mr_Husanboy	Newspapers (CEOI21_newspapers)	C++14	6 / 100	1 ms	308 KiB

newspapers

#pragma GCC optimize("Ofast")

#include<bits/stdc++.h>


 
 
using namespace std;
using ll = long long;


 
mt19937 rng(123);
#define ld long double
#define ull unsigned long long 
#define ios ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define all(a) a.begin(), a.end()
#define ff first
#define ss second
#define vi vector<int>
#define vll vector<ll>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define setp(x) setprecision(x)


ll mod=1e9+7;
int inf=1e9;
const int LOGN = 20;
const int MXX=3e5;

const long double PI = 3.1415926535897932384626433832795;







void solve(){
	int n; cin >> n;
	cout << "YES\n";
	if(n%2 == 0){
		cout << 2*n << '\n';
		for(int i = 1; i <= n; i ++) cout << i << ' ';
		cout << n << ' ';
		for(int i = 1; i < n; i ++) cout << i << ' ';
	}else{
		cout << 2*n-1 << '\n';
		for(int i = 1; i <= n; i ++){
			cout << i << ' ';
		}
		for(int i = 1; i < n; i ++) cout << i << ' ';
	}
}

 
int main(){
	int testcases = 1;
//	cin >> testcases;
	while(testcases --){
		solve(); if(testcases) cout << '\n';
	}
} 

• Subtask 1: 0 / 12
• Subtask 2: 6 / 8
• Subtask 3: 0 / 80