Submission #1053957

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053957		ArthuroWich	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	50 ms	19112 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define int long long int
void solve() {
    int n, m, ans = 0;
    cin >> n >> m;
    vector<int> ai(m, 0), aj(n, 0); 
    vector<string> grid(n);
    for (auto &x : grid) {
        cin >> x;
    }
    for (int i = n-1; i >= 0; i--) {
        for (int j = m-1; j >= 0; j--) {
            if (grid[i][j] == 'J') {
                ans += aj[i]*ai[j];
            } else if (grid[i][j] == 'O') {
                aj[i]++;
            } else if (grid[i][j] == 'I') {
                ai[j]++;
            }
        }
    }
    cout << ans << endl;
}
int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    t = 1;
    while(t--) {
        solve();
    }
}

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