Submission #617551

#TimeUsernameProblemLanguageResultExecution timeMemory
617551Mr_HusanboyNewspapers (CEOI21_newspapers)C++14
6 / 100
1 ms212 KiB
#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; vector<vi> g; void solve(){ int n; cin >> n; cout << "YES\n"; if(n == 2){ cout << "2\n1 1"; }else if(n == 3){ cout << "2\n2 2"; }else if(n%2 == 0){ cout << 2*n - 3 << '\n'; for(int i = 2; i <= n; i ++) cout << i << ' '; for(int i = 2; 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'; } }
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