제출 #855750

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
855750		vjudge1	Strah (COCI18_strah)	C++17	55 / 110	1099 ms	15964 KiB

strah

//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

char getcharr() {
    char ch;
    cin >> ch;

    return ch;
}

#define ONLINE_JUDGE
void solve() {
    int n, m;
    cin >> n >> m;

    vector <vector <int>> pref(n +1, vector <int> (m +1, 0)); 
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            if(getcharr() == '#') {
                pref[i][j]++;
            }
        }
    }

    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            pref[i][j] += pref[i][j -1] + pref[i -1][j] - pref[i -1][j -1];
        }
    }

    auto get = [&](int x1, int y1, int x2, int y2) -> int {
        x1--;
        y1--;

        return pref[x2][y2] + pref[x1][y1] - pref[x2][y1] - pref[x1][y2];
    };

    auto check = [&](int k, int l, int a, int mid) -> bool {
        return get(k, l, a, mid) == 0;
    };

    i64 res = 0;
    for(int k = 1; k <= n; k++) {
        for(int l = 1; l <= m; l++) {
            for(int a = k; a <= n; a++) {
                int _l = l, _r = m, ans = m;
                while(_l <= _r) {
                    //cerr << _l << " " << _r;
                    int mid = (_l + _r) / 2;
                    if(check(k, l, a, mid)) {
                        //cerr << "...";
                        _l = mid +1;
                        ans = mid;
                    } else {
                        //cerr << "!!!";
                        _r = mid -1;
                    }
                    //cerr << "\n";
                }

                if(check(k, l, a, ans)) {
                    //cerr << k << " " << l << " " << a << " " << ans << " :: ";
                    ans = ans - l +1;
                    i64 x = (a - k +1) * 1LL * (ans) * (ans +1) / 2;
                    //cerr << x << "\n";
                    res += x;
                }
            }
        }
    }

    cout << res << "\n";
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 11 / 11
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 11
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11