結果
| 問題 |
No.2719 Equal Inner Products in Permutation
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-04-05 23:11:43 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 75 ms / 2,000 ms |
| コード長 | 2,125 bytes |
| コンパイル時間 | 2,288 ms |
| コンパイル使用メモリ | 201,956 KB |
| 最終ジャッジ日時 | 2025-02-20 22:01:16 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 30 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
vector <int> s1, s2, s3;
void work2(vector <int> a){
int n = a.size();
int m = n / 3;
for (int i = 0; i < m; i++){
s1.push_back(a[i]);
s2.push_back(a[i + m]);
s3.push_back(a[i + 2 * m]);
}
}
void work(int n){
if (n == 2){
work2({1, 4, 3, 6, 5, 2});
} else if (n == 3){
work2({1, 2, 8, 3, 6, 9, 7, 5, 4});
} else if (n == 4){
work2({1, 2, 4, 11, 7, 9, 10, 12, 8, 5, 6, 3});
} else if (n == 5) {
work2({1, 2, 3, 8, 13, 7, 10, 12, 14, 15, 11, 9, 6, 4, 5});
} else {
work(n - 4);
int m = 3 * n - 12;
work2({m + 5, m + 8, m + 10, m + 11, m + 1, m + 2, m + 3, m + 4, m + 6, m + 7, m + 9, m + 12});
}
}
void Solve()
{
int n; cin >> n;
if (n == 1){
cout << -1 << "\n";
return;
}
work(n);
int v1 = 0, v2 = 0;
vector <bool> ok(3 * n + 1, false);
for (int i = 0; i < n; i++){
v1 += s1[i] * s2[i];
v2 += s2[i] * s3[i];
ok[s1[i]] = true;
ok[s2[i]] = true;
ok[s3[i]] = true;
}
for (auto x : s1) cout << x << " ";
for (auto x : s2) cout << x << " ";
for (auto x : s3) cout << x << " ";
if (v1 != v2){
cout << "NOOO\n";
}
for (int i = 1; i <= 3 * n; i++) if (!ok[i]){
cout << "NOOB\n";
}
}
int32_t main()
{
auto begin = std::chrono::high_resolution_clock::now();
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
// freopen("in", "r", stdin);
// freopen("out", "w", stdout);
// cin >> t;
for(int i = 1; i <= t; i++)
{
//cout << "Case #" << i << ": ";
Solve();
}
auto end = std::chrono::high_resolution_clock::now();
auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
return 0;
}