Submission #557875

#	Time	Username	Problem	Language	Result	Execution time	Memory
557875		alextodoran	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	264 ms	53124 KiB

joi2019_ho_t1

/**
 ____ ____ ____ ____ ____
||a |||t |||o |||d |||o ||
||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;



int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int N, M;
    cin >> N >> M;
    char mat[N][M];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < M; j++) {
            cin >> mat[i][j];
        }
    }
    int R[N][M];
    for (int i = 0; i < N; i++) {
        for (int j = M - 1, curr = 0; j >= 0; j--) {
            curr += (mat[i][j] == 'O');
            R[i][j] = (mat[i][j] == 'J' ? curr : 0);
        }
    }
    ll answer = 0;
    for (int j = 0; j < M; j++) {
        for (int i = 0, curr = 0; i < N; i++) {
            curr += R[i][j];
            if (mat[i][j] == 'I') {
                answer += curr;
            }
        }
    }
    cout << answer << "\n";

    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50