oj.uz

Submission #680079

# Submission time Handle Problem Language Result Execution time Memory
680079 2023-01-09T21:25:56 Z stevancv Furniture (JOI20_furniture) C++14
5 / 100
 5000 ms 54204 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define sadd(a, b) a = Add(a, b)
#define smul(a, b) a = Mul(a, b)
using namespace std;
const int N = 1e3 + 2;
const int mod = 1e9 + 7;
int n, m;
bool a[N][N], uni[N][N], x[N][N], y[N][N], z[N][N];
set<pair<int, int>> pos[2 * N];
bool Can(int i, int j) {
    if (i == 1 && j == 1) return 1;
    if (i == n && j == m) return 1;
    if (z[i][j] == 0) return 1;
    return (z[i - 1][j] | z[i][j - 1]) & (z[i + 1][j] | z[i][j + 1]);
}
void Dfs(int i, int j) {
    if (i <= 0 || i > n) return;
    if (j <= 0 || j > m) return;
    z[i][j] = 0;
    pos[i + j].erase({i, j});
    if (!Can(i - 1, j)) Dfs(i - 1, j);
    if (!Can(i, j - 1)) Dfs(i, j - 1);
    if (!Can(i + 1, j)) Dfs(i + 1, j);
    if (!Can(i, j + 1)) Dfs(i, j + 1);
}
void Add(int i, int j) {
    Dfs(i, j);
    for (int l = 2; l <= n + m; l++) {
        if (pos[l].size() == 1) {
            int ii = pos[l].begin()->first;
            int jj = pos[l].begin()->second;
            uni[ii][jj] = 1;
        }
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
            pos[i + j].insert({i, j});
        }
    }
    for (int l = 2; l <= n + m; l++) {
        if (pos[l].size() == 1) {
            int ii = pos[l].begin()->first;
            int jj = pos[l].begin()->second;
            uni[ii][jj] = 1;
        }
    }
    x[1][1] = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            x[i][j] |= x[i - 1][j] | x[i][j - 1];
        }
    }
    y[n][m] = 1;
    for (int i = n; i >= 1; i--) {
        for (int j = m; j >= 1; j--) {
            y[i][j] |= y[i + 1][j] | y[i][j + 1];
        }
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            z[i][j] = x[i][j] & y[i][j];
        }
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            if (a[i][j] == 1) Add(i, j);
        }
    }
    int q; cin >> q;
    while (q--) {
        int i, j;
        cin >> i >> j;
        if (uni[i][j] == 1) {
            cout << 0 << en;
        }
        else {
            cout << 1 << en;
            Add(i, j);
        }
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 5 ms 1108 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 13 ms 1364 KB Output is correct
5 Correct 14 ms 1364 KB Output is correct
6 Correct 15 ms 1492 KB Output is correct
7 Correct 16 ms 1492 KB Output is correct
8 Correct 16 ms 1452 KB Output is correct
9 Correct 16 ms 1492 KB Output is correct

Subtask #2
0.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 5 ms 1108 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 13 ms 1364 KB Output is correct
5 Correct 14 ms 1364 KB Output is correct
6 Correct 15 ms 1492 KB Output is correct
7 Correct 16 ms 1492 KB Output is correct
8 Correct 16 ms 1452 KB Output is correct
9 Correct 16 ms 1492 KB Output is correct
10 Correct 165 ms 3644 KB Output is correct
11 Correct 13 ms 1236 KB Output is correct
12 Correct 1831 ms 54204 KB Output is correct
13 Correct 537 ms 47300 KB Output is correct
14 Execution timed out 5067 ms 53276 KB Time limit exceeded
15 Halted 0 ms 0 KB -