Submission #990460

#	Time	Username	Problem	Language	Result	Execution time	Memory
990460		Zero_OP	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	128 ms	18004 KiB

joi2019_ho_t1

#include<bits/stdc++.h>

using namespace std;

const int MAX = 3e3 + 5;

int n, m, f[MAX];
char a[MAX][MAX];

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

    cin >> n >> m;
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= m; ++j){
            cin >> a[i][j];
        }
    }

    long long ans = 0;
    for(int j = m; j >= 1; --j){
        int sum = 0;
        for(int i = 1; i <= n; ++i){
            if(a[i][j] == 'J'){
                sum += f[i];
            }
            else if(a[i][j] == 'O'){
                ++f[i];
            }
            else{
                ans += sum;
            }
        }
    }
    cout << ans << '\n';

    return 0;
}

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