AtCoder Grand Contest 019

Submission #5792252

Source codeソースコード

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define repf(i, j, n) for (int i = (j); i < (n); i++)
#define repr(i, n) for (int i = (n)-1; i >= 0; i--)

signed main() {
  string s;
  cin >> s;
  int n = s.size();
  map<char, int> cnt;
  for (auto&& u : s) cnt[u]++;
  int ret = n * (n - 1) / 2 + 1;
  for (auto&& u : cnt) ret -= u.second * (u.second - 1) / 2;
  cout << ret << endl;
}

Submission

Task問題 B - Reverse and Compare
User nameユーザ名 mnrutd
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 500
Source lengthソースコード長 470 Byte
File nameファイル名
Exec time実行時間 13 ms
Memory usageメモリ使用量 640 KB

Test case

Set

Set name Score得点 / Max score Cases
Sample - sample_01.txt,sample_02.txt,sample_03.txt
All 500 / 500 sample_01.txt,sample_02.txt,sample_03.txt,sample_01.txt,sample_02.txt,sample_03.txt,subtask_1_01.txt,subtask_1_02.txt,subtask_1_03.txt,subtask_1_04.txt,subtask_1_05.txt,subtask_1_06.txt,subtask_1_07.txt,subtask_1_08.txt,subtask_1_09.txt,subtask_1_10.txt,subtask_1_11.txt,subtask_1_12.txt,subtask_1_13.txt,subtask_1_14.txt,subtask_1_15.txt,subtask_1_16.txt,subtask_1_17.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
subtask_1_01.txt AC 1 ms 256 KB
subtask_1_02.txt AC 8 ms 640 KB
subtask_1_03.txt AC 1 ms 256 KB
subtask_1_04.txt AC 1 ms 256 KB
subtask_1_05.txt AC 1 ms 256 KB
subtask_1_06.txt AC 1 ms 256 KB
subtask_1_07.txt AC 2 ms 256 KB
subtask_1_08.txt AC 13 ms 640 KB
subtask_1_09.txt AC 9 ms 640 KB
subtask_1_10.txt AC 9 ms 640 KB
subtask_1_11.txt AC 12 ms 640 KB
subtask_1_12.txt AC 9 ms 640 KB
subtask_1_13.txt AC 9 ms 640 KB
subtask_1_14.txt AC 8 ms 640 KB
subtask_1_15.txt AC 8 ms 640 KB
subtask_1_16.txt AC 9 ms 640 KB
subtask_1_17.txt AC 9 ms 640 KB