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Submission #784374

# Submission time Handle Problem Language Result Execution time Memory
784374 2023-07-16T04:44:51 Z christinelynn Furniture (JOI20_furniture) C++17
0 / 100
 5 ms 748 KB 
#include<bits/stdc++.h>
 
#define sherina ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pb push_back
#define int long long
#define INF 1e18
#define endl '\n'
 
using namespace std;

int n , m , c[1005][1005] , q , x , y , aa[1005] , bb[1005] , diag[1005] , sa , sb;

bool inside(int a , int b){
   return 0 < a && a <= n && 0 < b && b <= m;
}

void rec(int x , int y){
    if((x != sa || y != sb) && (!inside(x , y) || c[x][y])) return;
    diag[x + y]--;
    c[x][y] = 1;
    if(c[x + 1][y - 1]){
        rec(x , y - 1);
        rec(x + 1 , y);
    }
    if(c[x - 1][y + 1]){
        //cout << x -1 << " " << y + 1<< endl;
        rec(x - 1 , y); 
        rec(x , y + 1);
    }
}

signed main(){
    cin >> n >> m;
    for(int i = 0 ; i <= n + 1 ; i++){
        c[i][0] = 1;
        c[i][m + 1] = 1;
    }
    for(int i = 0 ; i <= m + 1 ; i++){
        c[0][i] = 1;
        c[n + 1][i] = 1;
    }
    for(int i = 1 ;  i <= n ; i++){
        for(int j = 1 ; j <= m ; j++){
            cin >> c[i][j];
            diag[i + j]++;
            sa = i;
            sb = j;
            if(c[i][j]) rec(i , j);
        }
    }
    cin >> q;
    while(q--){
        cin >> x >> y;
        if(c[x][y]){
            cout << "1" << endl;
        }
        else if(diag[x + y] == 1){
            cout << "0" << endl;
        }
        else{
            cout <<"1" << endl;
            rec(x , y);
        }

    }
}

Subtask #1
0.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Incorrect 5 ms 748 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 596 KB Output is correct
2 Incorrect 5 ms 748 KB Output isn't correct
3 Halted 0 ms 0 KB -