oj.uz

Submission #1053697

# Submission time Handle Problem Language Result Execution time Memory
1053697 2024-08-11T15:55:01 Z kachim2 Furniture (JOI20_furniture) C++17
100 / 100
 1588 ms 6740 KB 
    #include<bits/stdc++.h>
    using namespace std;
    int main(){
        int n, m;
        cin >> n >> m;
        vector<vector<bool>> p(n+2, vector<bool>(m+2, 0));
        vector<vector<bool>> rp(n+2, vector<bool>(m+2, 0));
        vector<vector<int>> inp(n+2, vector<int>(m+2, 0));
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= m; j++ ){
            cin >> inp[i][j];
            }
        }
        rp[n][m] = 1;
        p[1][1] = 1;
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= m; j++ ){
            if(inp[i][j] == 0){
                if(i!=1 || j!=1)
                p[i][j] = p[i-1][j] || p[i][j-1];
     
            }
            }
        }
        for(int i = n; i >0; i--){
            for(int j = m; j >0; j-- ){
            if(inp[i][j] == 0){
     
                if(i!=n || j!=m)
                rp[i][j] = rp[i+1][j] || rp[i][j+1];
            }
            }
        }
        int q;
        cin >> q;
     
     
        for(int _ = 0; _ < q; _++){
            int x, y;
            cin >> x >> y;
            if(p[x][y]){
     
     
     
                bool canwe = 0;
                for(int i = 1; i < x; i++){
                    if(rp[i][y+1] && p[i][y+1])
                    {
                        canwe=1;
                        break;
                    }
                }
                if(!canwe)
                for(int i = x+1; i <= n; i++){
                    if(rp[i][y-1] && p[i][y-1])
                    {
                        canwe=1;
                        break;
                    }
                }
                if(!canwe){
                    cout << "0\n";
                    continue;
                }
                cout << "1\n";
                p[x][y] = 0;
                stack<pair<int, int>> pos;
                pos.push({x+1, y});
                pos.push({x, y+1});
                while(!pos.empty()){
                    auto v = pos.top();
                    pos.pop();
                    if(p[v.first][v.second]){
                        p[v.first][v.second] = p[v.first-1][v.second] || p[v.first][v.second-1];
                        if(!p[v.first][v.second]){
                            pos.push({v.first+1, v.second});
                            pos.push({v.first, v.second+1});
                        }
                    }
                }
                rp[x][y] = 0;
                stack<pair<int, int>> rpos;
                rpos.push({x-1, y});
                rpos.push({x, y-1});
                while(!rpos.empty()){
                    auto v = rpos.top();
                    rpos.pop();
                    if(rp[v.first][v.second]){
                        rp[v.first][v.second] = rp[v.first+1][v.second] || rp[v.first][v.second+1];
                        if(!rp[v.first][v.second]){
                            rpos.push({v.first-1, v.second});
                            rpos.push({v.first, v.second-1});
                        }
                    }
                }
            }else{
                cout << "1\n";
            }
        }
     
    }

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 4 ms 472 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 9 ms 496 KB Output is correct
5 Correct 11 ms 512 KB Output is correct
6 Correct 15 ms 348 KB Output is correct
7 Correct 12 ms 348 KB Output is correct
8 Correct 12 ms 348 KB Output is correct
9 Correct 12 ms 516 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 4 ms 472 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 9 ms 496 KB Output is correct
5 Correct 11 ms 512 KB Output is correct
6 Correct 15 ms 348 KB Output is correct
7 Correct 12 ms 348 KB Output is correct
8 Correct 12 ms 348 KB Output is correct
9 Correct 12 ms 516 KB Output is correct
10 Correct 30 ms 600 KB Output is correct
11 Correct 8 ms 348 KB Output is correct
12 Correct 470 ms 4948 KB Output is correct
13 Correct 92 ms 4184 KB Output is correct
14 Correct 1074 ms 5744 KB Output is correct
15 Correct 1069 ms 5716 KB Output is correct
16 Correct 1111 ms 6164 KB Output is correct
17 Correct 1338 ms 6396 KB Output is correct
18 Correct 1151 ms 6316 KB Output is correct
19 Correct 1199 ms 6740 KB Output is correct
20 Correct 1588 ms 6736 KB Output is correct
21 Correct 1417 ms 6588 KB Output is correct