Submission #1123228

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123228		LucaIlie	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	379 ms	9136 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 3000;
char mat[MAX_N][MAX_N];
int frecvCol[MAX_N];

int main() {
    int n, m;

    cin >> n >> m;
    for ( int l = 0; l < n; l++ ) {
        for ( int c = 0; c < m; c++ )
            cin >> mat[l][c];
    }

    long long ans = 0;
    for ( int l = n - 1; l >= 0; l-- ) {
        int frecvLin = 0;
        for ( int c = m - 1; c >= 0; c-- ) {
            if ( mat[l][c] == 'J' )
                ans += frecvLin * frecvCol[c];
            else if ( mat[l][c] == 'O' )
                frecvLin++;
            else
                frecvCol[c]++;
        }
    }

    cout << ans << "\n";
}

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