Submission #1046637

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046637		DeathIsAwe	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	248 ms	91220 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define ll long long

int main() {
    int h, w; cin >> h >> w;
    vector<string> grid(h);
    for (int i=0;i<h;i++) {
        cin >> grid[i];
    }
    vector<vector<int>> numsbelow, numsright;
    vector<int> bruh(w);
    for (int i=0;i<h;i++) {
        numsbelow.push_back(bruh);
        numsright.push_back(bruh);
    }



    int counter;
    for (int i=0;i<w;i++) {
        counter = 0;
        for (int j=h-1;j>-1;j--) {
            if (grid[j][i] == 'I') {
                counter++;
            } else if (grid[j][i] == 'J') {
                numsbelow[j][i] = counter;
            }
        }
    }
    for (int i=0;i<h;i++) {
        counter = 0;
        for (int j=w-1;j>-1;j--) {
            if (grid[i][j] == 'O') {
                counter++;
            } else if (grid[i][j] == 'J') {
                numsright[i][j] = counter;
            }
        }
    }
    


    ll ans = 0;
    for (int i=0;i<h;i++) {
        for (int j=0;j<w;j++) {
            if (grid[i][j] == 'J') {
                ans += numsbelow[i][j] * numsright[i][j];
            }
        }
    }
    cout << ans;
}

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