Submission #1053135

#TimeUsernameProblemLanguageResultExecution timeMemory
1053135user736482Furniture (JOI20_furniture)C++17
100 / 100
152 ms3604 KiB
#include<bits/stdc++.h>
using namespace std;
int n,m,c,x,y,q;
bool blocked[1007][1007];
int good[2007];

void checkup(int a,int b);
void checkdown(int a,int b);

bool add(int a,int b){
    if(blocked[a][b])
        return 1;
    if(good[a+b]==1)
        return 0;
    blocked[a][b]=1;
    good[a+b]--;
    checkup(a-1,b);
    checkup(a,b-1);
    checkdown(a+1,b);
    checkdown(a,b+1);
    return 1;

}
void checkup(int a,int b){
    if(!(blocked[a+1][b] && blocked[a][b+1]))
        return;
    if(blocked[a][b])
        return;
    blocked[a][b]=1;
    good[a+b]--;
    checkup(a-1,b);
    checkup(a,b-1);

}

void checkdown(int a,int b){
    //cout<<a<<" "<<b<<"  ";
    if(!(blocked[a-1][b] && blocked[a][b-1]))
        return;
    if(blocked[a][b])
        return;
    blocked[a][b]=1;
    good[a+b]--;
    checkdown(a+1,b);
    checkdown(a,b+1);
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m;
    for(int i=0;i<=n+1;i++){
        blocked[i][0]=1;
        blocked[i][m+1]=1;
    }
    for(int i=0;i<=m;i++){
        blocked[0][i]=1;
        blocked[n+1][i]=1;
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            good[j+i+2]++;
        }
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            cin>>c;
            if(c)
                add(i+1,j+1);
                    //cout<<"Error";
            /*for(int k=0;k<n;k++){
                for(int l=0;l<m;l++){
                    cout<<blocked[k+1][l+1]<<" ";
                }
                cout<<"\n";
            }
            cout<<"\n";*/
        }
    }
    cin>>q;
    for(int i=0;i<q;i++){
        cin>>x>>y;
        cout<<add(x,y)<<"\n";
    }
    return 0;
}
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