Submission #3232780

Source Code Expand

#include <iostream>
#include <string>
using namespace std;

int main() {
    int N;
    string S;
    cin >> N >> S;

    int cnt[N + 1];
    // i文字目までにWがいくつあるか

    cnt[0] = 0;
    for (int i = 0; i < N; ++i) {
        cnt[i + 1] = cnt[i];
        if (S[i] == 'W') ++cnt[i + 1];
    }

    int ans = N;
    for (int i = 1; i <= N; ++i) {
        // 自分より西にいて西を向いている人が
        //  cnt[i-1]人
        // 自分より東にいて東を向いている人が
        //  (N-i)-(cnt[N]-cnt[i])人
        ans = min(ans, cnt[i - 1] + (N - i) - (cnt[N] - cnt[i]));
    }
    cout << ans << endl;
    return 0;
}

Submission Info

Submission Time
Task C - Attention
User Tiramister
Language C++14 (GCC 5.4.1)
Score 300
Code Size 694 Byte
Status AC
Exec Time 13 ms
Memory 1796 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 26
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All 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, subtask_1_18.txt, subtask_1_19.txt, subtask_1_20.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KiB
sample_02.txt AC 1 ms 256 KiB
sample_03.txt AC 1 ms 256 KiB
subtask_1_01.txt AC 11 ms 1668 KiB
subtask_1_02.txt AC 3 ms 512 KiB
subtask_1_03.txt AC 8 ms 1284 KiB
subtask_1_04.txt AC 8 ms 1284 KiB
subtask_1_05.txt AC 5 ms 896 KiB
subtask_1_06.txt AC 12 ms 1796 KiB
subtask_1_07.txt AC 12 ms 1796 KiB
subtask_1_08.txt AC 11 ms 1796 KiB
subtask_1_09.txt AC 9 ms 1412 KiB
subtask_1_10.txt AC 13 ms 1796 KiB
subtask_1_11.txt AC 13 ms 1796 KiB
subtask_1_12.txt AC 13 ms 1796 KiB
subtask_1_13.txt AC 12 ms 1796 KiB
subtask_1_14.txt AC 12 ms 1796 KiB
subtask_1_15.txt AC 12 ms 1796 KiB
subtask_1_16.txt AC 12 ms 1796 KiB
subtask_1_17.txt AC 12 ms 1796 KiB
subtask_1_18.txt AC 12 ms 1796 KiB
subtask_1_19.txt AC 12 ms 1796 KiB
subtask_1_20.txt AC 12 ms 1796 KiB