提出 #70423721
ソースコード 拡げる
#include<bits/stdc++.h>
#define LL long long
#define PII pair<int, int>
#define PLL pair<LL, LL>
#define PLI pair<LL, int>
using namespace std;
inline void solve() {
int n; cin >> n;
vector<int> a(n + 1), cnt(n + 1), suf(n + 1);
for (int i = 1; i <= n; i++) {
cin >> a[i];
suf[a[i]]++;
}
LL ans = 0;
for (int i = 1; i <= n; i++) {
ans += cnt[a[i]] * (LL)(n - suf[a[i]]);
// cout << i << " " << cnt[a[i]] << " " << suf[a[i]] << "\n";
cnt[a[i]]++;
}
cout << ans << "\n";
}
signed main() {
ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
int t = 1;
//cin >> t;
while (t--) solve();
return 0;
}
提出情報
| 提出日時 | |
|---|---|
| 問題 | C - Odd One Subsequence |
| ユーザ | C202627yehan |
| 言語 | C++ 20 (gcc 12.2) |
| 得点 | 300 |
| コード長 | 659 Byte |
| 結果 | AC |
| 実行時間 | 12 ms |
| メモリ | 5516 KiB |
ジャッジ結果
| セット名 | Sample | All | ||||
|---|---|---|---|---|---|---|
| 得点 / 配点 | 0 / 0 | 300 / 300 | ||||
| 結果 |
|
|
| セット名 | テストケース |
|---|---|
| Sample | example_00.txt, example_01.txt |
| All | example_00.txt, example_01.txt, hand_00.txt, hand_01.txt, hand_02.txt, hand_03.txt, hand_04.txt, hand_05.txt, random_00.txt, random_01.txt, random_02.txt, random_03.txt, random_04.txt, random_05.txt, random_06.txt, random_07.txt, random_08.txt, random_09.txt, random_10.txt, random_11.txt, random_12.txt, random_13.txt, random_14.txt, random_15.txt, random_16.txt, random_17.txt, random_18.txt, random_19.txt |
| ケース名 | 結果 | 実行時間 | メモリ |
|---|---|---|---|
| example_00.txt | AC | 1 ms | 3460 KiB |
| example_01.txt | AC | 1 ms | 3516 KiB |
| hand_00.txt | AC | 12 ms | 5364 KiB |
| hand_01.txt | AC | 10 ms | 5376 KiB |
| hand_02.txt | AC | 9 ms | 5424 KiB |
| hand_03.txt | AC | 1 ms | 3452 KiB |
| hand_04.txt | AC | 1 ms | 3476 KiB |
| hand_05.txt | AC | 11 ms | 5516 KiB |
| random_00.txt | AC | 12 ms | 5412 KiB |
| random_01.txt | AC | 12 ms | 5420 KiB |
| random_02.txt | AC | 12 ms | 5420 KiB |
| random_03.txt | AC | 12 ms | 5424 KiB |
| random_04.txt | AC | 12 ms | 5380 KiB |
| random_05.txt | AC | 11 ms | 5424 KiB |
| random_06.txt | AC | 11 ms | 5288 KiB |
| random_07.txt | AC | 11 ms | 5360 KiB |
| random_08.txt | AC | 11 ms | 5388 KiB |
| random_09.txt | AC | 11 ms | 5384 KiB |
| random_10.txt | AC | 9 ms | 5368 KiB |
| random_11.txt | AC | 9 ms | 5416 KiB |
| random_12.txt | AC | 9 ms | 5288 KiB |
| random_13.txt | AC | 9 ms | 5352 KiB |
| random_14.txt | AC | 9 ms | 5360 KiB |
| random_15.txt | AC | 8 ms | 5380 KiB |
| random_16.txt | AC | 7 ms | 5376 KiB |
| random_17.txt | AC | 7 ms | 5372 KiB |
| random_18.txt | AC | 8 ms | 5428 KiB |
| random_19.txt | AC | 8 ms | 5424 KiB |