#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;
}
if (n == 1) {
cout << "1 1\n";
} else if( n == 2) {
cout << "2 1 1\n";
} else {
vector<int> res;
for (int i = 2; i <= n-1; i++) {
res.push_back(i);
}
if (n % 2 == 0)
res.push_back(1);
for (int i = n-1; i >= 2; i--) {
res.push_back(i);
}
cout << sz(res) << '\n';
for (int i : res) cout << i << ' ';
cout << '\n';
}return 0;
}
signed main() {
cin.tie(0)->sync_with_stdio(0);
int t = 1;
#ifdef ONPC
t = 10000;
#endif
cin >> t;
while (t-- && cin) {
if (solve()) break;
#ifdef ONPC
cout << "____________________" << endl;
#endif
}
return 0;
}
/*
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▒▒████████ █████ ▒▒████████ █████ █████ ▒▒███████ ▒▒██████ █████
▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒ ▒▒▒▒▒███ ▒▒▒▒▒▒ ▒▒▒▒▒
███ ▒███
▒▒██████
▒▒▒▒▒▒
*/
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Token "1" doesn't correspond to pattern "YES|NO" |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Token "1" doesn't correspond to pattern "YES|NO" |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Token "1" doesn't correspond to pattern "YES|NO" |
2 |
Halted |
0 ms |
0 KB |
- |