Submission #1128759

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128759		kream	Bomb (IZhO17_bomb)	C++20	12 / 100	45 ms	10572 KiB

bomb

#include <bits/stdc++.h>
using namespace std;

const int N = 1e3 + 3;
const int inf = 1e9 + 7;
int a[N][N];
pair < int, int > d[N][N];

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    int n, m;
    cin >> n >> m;

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            char c;
            cin >> c;
            a[i][j] = c - '0';
        }
    }

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            if(a[i][j] == 0) d[i][j] = {0, 0};
            else d[i][j].first = d[i][j - 1].first + 1, d[i][j].second = d[i - 1][j].second + 1;
        }
    }

    int ans1 = N, ans2 = N;
    for(int i = 1; i <= n; i++){
        int cnt = 0;
        for(int j = m; j >= 1; j--){
            if(cnt) cnt--;
            if(d[i][j].first && !cnt) ans1 = min(ans1, d[i][j].first), cnt = d[i][j].first;
        }
    }
    for(int j = 1; j <= m; j++){
        int cnt = 0;
        for(int i = n; i >= 1; i--){
            if(cnt) cnt--;
            if(d[i][j].second && !cnt) ans2 = min(ans2, d[i][j].second), cnt = d[i][j].second;
        }
    }

    cout << ans1 * ans2;
}

• Subtask 1: 12 / 100