Submission #375985

#	Time	Username	Problem	Language	Result	Execution time	Memory
375985		valerikk	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	301 ms	89836 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

int main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif
    ios::sync_with_stdio(false);
    cin.tie(0);
    int h, w;
    cin >> h >> w;
    vector<string> s(h);
    for (int i = 0; i < h; ++i) {
        cin >> s[i];
    }
    vector<vector<int>> r(h, vector<int>(w, 0));
    for (int i = 0; i < h; ++i) {
        int cnt = 0;
        for (int j = w - 1; j >= 0; --j) {
            if (s[i][j] == 'O') ++cnt;
            r[i][j] = cnt;
        }
    }
    vector<vector<int>> d(h, vector<int>(w, 0));
    for (int j = 0; j < w; ++j) {
        int cnt = 0;
        for (int i = h - 1; i >= 0; --i) {
            if (s[i][j] == 'I') ++cnt;
            d[i][j] = cnt;
        }
    }
    ll ans = 0;
    for (int i = 0; i < h; ++i) {
        for (int j = 0; j < w; ++j) {
            if (s[i][j] == 'J') ans += r[i][j] * d[i][j];
        }
    }
    cout << ans << endl;
    return 0;
}

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