Submission #998392

#	Time	Username	Problem	Language	Result	Execution time	Memory
998392		RaresFelix	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	77 ms	19032 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

using ll = long long; 
using vi = vector<int>;

int main() {
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    int h, w;
    cin >> h >> w;
    vector<string> S(h);
    for(int i = 0; i < h; ++i) {
        cin >> S[i];
        reverse(S[i].begin(), S[i].end());
    }
    reverse(S.begin(), S.end());
    vi Fi(h, 0), Fj(w, 0);
    ll re = 0;

    for(int i = 0; i < h; ++i)
        for(int j = 0; j < w; ++j) {
            if(S[i][j] == 'O') ++Fi[i];
            if(S[i][j] == 'I') ++Fj[j];
            if(S[i][j] == 'J') {
                int cre = Fi[i] * Fj[j];
                if(cre)
                    re += cre;
            }
        }
    cout << re << "\n";
    return 0;
}

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