oj.uz

Submission #1053696

# Submission time Handle Problem Language Result Execution time Memory
1053696 2024-08-11T15:51:35 Z kachim2 Furniture (JOI20_furniture) C++17
100 / 100
 1810 ms 16212 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;
                    }
                }
                for(int i = x+1; i <= n; i++){
                    if(rp[i][y-1] && p[i][y-1])
                    {
                        canwe=1;
                    }
                }
                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 348 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 9 ms 348 KB Output is correct
5 Correct 10 ms 568 KB Output is correct
6 Correct 12 ms 348 KB Output is correct
7 Correct 14 ms 344 KB Output is correct
8 Correct 12 ms 348 KB Output is correct
9 Correct 12 ms 348 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 348 KB Output is correct
3 Correct 5 ms 348 KB Output is correct
4 Correct 9 ms 348 KB Output is correct
5 Correct 10 ms 568 KB Output is correct
6 Correct 12 ms 348 KB Output is correct
7 Correct 14 ms 344 KB Output is correct
8 Correct 12 ms 348 KB Output is correct
9 Correct 12 ms 348 KB Output is correct
10 Correct 30 ms 860 KB Output is correct
11 Correct 8 ms 348 KB Output is correct
12 Correct 835 ms 9044 KB Output is correct
13 Correct 123 ms 5968 KB Output is correct
14 Correct 1316 ms 13660 KB Output is correct
15 Correct 1444 ms 13652 KB Output is correct
16 Correct 1076 ms 15000 KB Output is correct
17 Correct 1434 ms 15696 KB Output is correct
18 Correct 1470 ms 15184 KB Output is correct
19 Correct 1200 ms 16212 KB Output is correct
20 Correct 1810 ms 16208 KB Output is correct
21 Correct 1664 ms 16188 KB Output is correct