Submission #1283024

#	Time	Username	Problem	Language	Result	Execution time	Memory
1283024		makskus	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	187 ms	80752 KiB

joi2019_ho_t1

#include <iostream>
#include <vector>
#include <string>
using namespace std;

int rze[3007][3007];
int kol[3007][3007];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    
    int h, w;
    cin >> h >> w;
    vector<string> tab(h);
    for (int i = 0; i < h; i++) cin >> tab[i];

    for (int i = 0; i < h; i++) {
        rze[i][w] = 0;
        for (int j = w - 1; j >= 0; j--) {
            rze[i][j] = rze[i][j + 1] + (tab[i][j] == 'O' ? 1 : 0);
        }
    }

    for (int j = 0; j < w; j++) {
        kol[h][j] = 0;
        for (int i = h - 1; i >= 0; i--) {
            kol[i][j] = kol[i + 1][j] + (tab[i][j] == 'I' ? 1 : 0);
        }
    }

    long long wynik = 0;

    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            if(tab[i][j] == 'J'){
                wynik += (long long) rze[i][j + 1] * kol[i + 1][j];
            }
        }
    }

    cout << wynik << "\n";
}

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