oj.uz

Submission #773222

# Submission time Handle Problem Language Result Execution time Memory
773222 2023-07-04T17:00:35 Z CyberCow Furniture (JOI20_furniture) C++17
100 / 100
 313 ms 18052 KB 
//#include <bits/stdc++.h>
#include <random>
#include <algorithm>
#include <bitset>
#include <chrono>
#include <cmath>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <chrono>
#define fr first
#define sc second
#define ad push_back
using namespace std;
using ll = long long;
mt19937 rnd(348502);
const int N = 1005;
int a[N][N];
int has[N][N];
int color[N][N], color1[N][N];
int hasan[N][N];
int ankqan[3 * N];

void solve()
{
    int n, i, j, m, x, y;
    cin >> n >> m;
    for ( i = 1; i <= n; i++)
    {
        for ( j = 1; j <= m; j++)
        {
            cin >> a[i][j];
        }
    }
    queue<pair<int, int>> q;
    color[1][1] = 1;
    q.push({ 1, 1 });
    while (!q.empty())
    {
        x = q.front().first;
        y = q.front().second;
        q.pop();
        if (x + 1 <= n && color[x + 1][y] == 0 && a[x + 1][y] == 0)
        {
            color[x + 1][y] = 1;
            q.push({ x + 1, y });
        }
        if (y + 1 <= m && color[x][y + 1] == 0 && a[x][y + 1] == 0)
        {
            color[x][y + 1] = 1;
            q.push({ x, y + 1 });
        }
    }
    color1[n][m] = 1;
    q.push({ n, m });
    while (!q.empty())
    {
        x = q.front().first;
        y = q.front().second;
        q.pop();
        if (x - 1 >= 1 && color1[x - 1][y] == 0 && a[x - 1][y] == 0)
        {
            color1[x - 1][y] = 1;
            q.push({ x - 1, y });
        }
        if (y - 1 >= 1 && color1[x][y - 1] == 0 && a[x][y - 1] == 0)
        {
            color1[x][y - 1] = 1;
            q.push({ x, y - 1 });
        }
    }
    for ( i = 1; i <= n; i++)
    {
        for ( j = 1; j <= m; j++)
        {
            if (color[i][j] == 1 && color1[i][j] == 1)
            {
                hasan[i][j] = 1;
                ankqan[i + j]++;
            }
        }
    }
    int qq;
    cin >> qq;
    for ( i = 0; i < qq; i++)
    {
        cin >> x >> y;
        if (hasan[x][y] == 0)
        {
            cout << 1 << '\n';
            continue;
        }
        if (ankqan[x + y] == 1)
        {
            cout << 0 << '\n';
            continue;
        }
        cout << 1 << '\n';
        q.push({ x, y });
        while (!q.empty())
        {
            x = q.front().first;
            y = q.front().second;
            q.pop();
            hasan[x][y] = 0;
            ankqan[x + y]--;
            if (hasan[x - 1][y + 1] == 0)
            {
                if (hasan[x - 1][y] == 1)
                {
                    q.push({ x - 1, y });
                }
                if (hasan[x][y + 1] == 1)
                {
                    q.push({ x, y + 1 });
                }
            }
            if (hasan[x + 1][y - 1] == 0)
            {
                if (hasan[x + 1][y] == 1)
                {
                    q.push({ x + 1, y });
                }
                if (hasan[x][y - 1] == 1)
                {
                    q.push({ x, y - 1 });
                }
            }
        }
    }
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 2 ms 1876 KB Output is correct
3 Correct 2 ms 1748 KB Output is correct
4 Correct 3 ms 1748 KB Output is correct
5 Correct 3 ms 1876 KB Output is correct
6 Correct 3 ms 1876 KB Output is correct
7 Correct 3 ms 1876 KB Output is correct
8 Correct 3 ms 1876 KB Output is correct
9 Correct 5 ms 1876 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 2 ms 1876 KB Output is correct
3 Correct 2 ms 1748 KB Output is correct
4 Correct 3 ms 1748 KB Output is correct
5 Correct 3 ms 1876 KB Output is correct
6 Correct 3 ms 1876 KB Output is correct
7 Correct 3 ms 1876 KB Output is correct
8 Correct 3 ms 1876 KB Output is correct
9 Correct 5 ms 1876 KB Output is correct
10 Correct 7 ms 1364 KB Output is correct
11 Correct 2 ms 1108 KB Output is correct
12 Correct 164 ms 16492 KB Output is correct
13 Correct 72 ms 15316 KB Output is correct
14 Correct 188 ms 16588 KB Output is correct
15 Correct 192 ms 16600 KB Output is correct
16 Correct 313 ms 17068 KB Output is correct
17 Correct 237 ms 17880 KB Output is correct
18 Correct 257 ms 17352 KB Output is correct
19 Correct 223 ms 18020 KB Output is correct
20 Correct 215 ms 18052 KB Output is correct
21 Correct 238 ms 17968 KB Output is correct