Submission #1172991

#	Time	Username	Problem	Language	Result	Execution time	Memory
1172991		Petrix	Furniture (JOI20_furniture)	C++20	5 / 100	126 ms	6240 KiB

furniture

#include <iostream>
using namespace std;

int n,m;
int v[1001][1001];
int diag[2002];

bool in(int l,int c){
    return (l>0 && c>0 && l<=n && c<=m);
}

void update(int l,int c);

void dfs(int l,int c){
    if(!v[l+1][c-1]) {
		update(l,c-1);
		update(l+1,c);
	}
	if(!v[l-1][c+1]) {
		update(l,c+1);
		update(l-1,c);
	}
}
void update(int l,int c){
    ///cout<<l<<" "<<c<<"|";
    if(v[l][c]){
        diag[l+c]--;v[l][c]=0;
        dfs(l,c);
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int i,j,a,b,q;
    cin>>n>>m;
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            v[i][j]=1;diag[i+j]++;
        }
    }
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            cin>>a;
            if(a) update(i,j);
        }
    }
    cin>>q;
    for(i=1;i<=q;i++){
        cin>>a>>b;
        if(v[a][b]==0){
            cout<<"1\n";
        }else if(diag[a+b]==1){
            cout<<"0\n";
        }else{
            update(a,b);
            cout<<"1\n";
        }
    }
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95