#include <bits/stdc++.h>
#ifdef ONPC
#include "t_debug.cpp"
#else
#define debug(...) 42
#endif
#define sz(a) ((int)(a).size())
using namespace std;
using ll = long long;
const int INF = 1e9;
const ll INFL = 1e18;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rng(RANDOM);
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U>& p) { return is >> p.first >> p.second; }
const int N = 2e5, LOGN = 17, MOD = 1e9+7;
int solve() {
int n;
if (!(cin >> n)) {
return 1;
}
cout << "YES\n";
if (n == 1) {
cout << "1 1\n";
} else if( n == 2) {
cout << "2 1 1\n";
} else {
cout << n *2 - 4 << '\n';
for (int i = 2; i < n; i++) cout << i << ' ';
for (int i = n-1; i > 1; i--) {
cout << i;
if (i != 2) cout << ' ';
}
}
return 0;
}
signed main() {
cin.tie(0)->sync_with_stdio(0);
int t = 1;
#ifdef ONPC
t = 10000;
#endif
while (t-- && cin) {
if (solve()) break;
#ifdef ONPC
cout << "____________________" << endl;
#endif
}
return 0;
}
/*
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▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒███ ▒▒▒▒▒▒ ▒▒▒▒▒
███ ▒███
▒▒██████
▒▒▒▒▒▒
*/
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
328 KB |
Output is correct |
5 |
Partially correct |
1 ms |
324 KB |
Failed to provide a successful strategy. |
6 |
Partially correct |
1 ms |
212 KB |
Failed to provide a successful strategy. |
7 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
324 KB |
Output is correct |
5 |
Correct |
1 ms |
328 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
320 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
1 ms |
340 KB |
Output is correct |
15 |
Correct |
1 ms |
340 KB |
Output is correct |
16 |
Correct |
2 ms |
340 KB |
Output is correct |
17 |
Correct |
1 ms |
328 KB |
Output is correct |
18 |
Correct |
1 ms |
212 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
328 KB |
Output is correct |
5 |
Partially correct |
1 ms |
324 KB |
Failed to provide a successful strategy. |
6 |
Partially correct |
1 ms |
212 KB |
Failed to provide a successful strategy. |
7 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |