| # | Time | Username | Problem | Language | Result | Execution time | Memory | 
|---|---|---|---|---|---|---|---|
| 809079 | vjudge1 | Bitaro the Brave (JOI19_ho_t1) | C++17 | 1084 ms | 52684 KiB | 
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int h, w;
    cin >> h >> w;
    vector<vector<int>> J(h), O(h), I(w);
    for (int i = 0; i < h; i++) {
        string s;
        cin >> s;
        for (int j = 0; j < w; j++) {
            if (s[j] == 'J') {
                J[i].push_back(j);
            } else if (s[j] == 'O') {
                O[i].push_back(j);
            } else {
                I[j].push_back(i);
            }
        }
    }
    for (int i = 0; i < w; i++) {
        sort(I[i].begin(), I[i].end());
    }
    long long ans = 0;
    for (int i = 0; i < h; i++) {
        for (int l = 0; l < O[i].size(); l++) { // Đổi j thành l ở đây
            for (int j = 0; j < J[i].size(); j++) { // Đổi l thành j ở đây
                if (O[i][l] > J[i][j]) {
                    int temp = I[J[i][j]].size();
                    int left = 0, right = I[J[i][j]].size() - 1;
                    while (left <= right) {
                        int mid = left + (right - left) / 2;
                        if (I[J[i][j]][mid] > i) {
                            temp = mid;
                            right = mid - 1;
                        } else {
                            left = mid + 1;
                        }
                    }
                    ans += I[J[i][j]].size() - temp;
                }
            }
        }
    }
    cout << ans;
    return 0;
}
Compilation message (stderr)
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