AtCoder Grand Contest 019

Submission #1540289

Source codeソースコード

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll MOD = 1000000007;

int counts[30][200002];

int main(){
    string A;
    cin >> A;

    memset(counts, 0, sizeof(counts));
    int N = A.size();
    for(int i=0;i<26;i++){
        char c = 'a' + i;
        int v = 0;
        for(int j=N-1;j>=0;j--){
            counts[i][j] = v;
            if(A[j] == c){
                v++;
            }
        }
    }

    ll ans = 0;
    for(int i=0;i<N;i++){
        ans += N - 1 - i - counts[int(A[i] - 'a')][i];
    }
    cout << 1 + ans << endl;

    return 0;
}

Submission

Task問題 B - Reverse and Compare
User nameユーザ名 ZABURO
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 641 Byte
File nameファイル名
Exec time実行時間 21 ms
Memory usageメモリ使用量 24068 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 7 ms 23680 KB
sample_02.txt AC 7 ms 23680 KB
sample_03.txt AC 7 ms 23680 KB
subtask_1_01.txt AC 7 ms 23680 KB
subtask_1_02.txt AC 20 ms 23940 KB
subtask_1_03.txt AC 7 ms 23680 KB
subtask_1_04.txt AC 7 ms 23680 KB
subtask_1_05.txt AC 7 ms 23680 KB
subtask_1_06.txt AC 7 ms 23680 KB
subtask_1_07.txt AC 8 ms 23680 KB
subtask_1_08.txt AC 21 ms 23940 KB
subtask_1_09.txt AC 21 ms 23940 KB
subtask_1_10.txt AC 21 ms 24068 KB
subtask_1_11.txt AC 21 ms 23940 KB
subtask_1_12.txt AC 21 ms 23940 KB
subtask_1_13.txt AC 21 ms 24068 KB
subtask_1_14.txt AC 21 ms 23940 KB
subtask_1_15.txt AC 21 ms 24068 KB
subtask_1_16.txt AC 21 ms 23940 KB
subtask_1_17.txt AC 21 ms 24068 KB