Submission #361734

#	Time	Username	Problem	Language	Result	Execution time	Memory
361734		Bill_00	Furniture (JOI20_furniture)	C++14	100 / 100	348 ms	17120 KiB

furniture

#include <bits/stdc++.h>
#define pb push_back
#define ff first
#define ss second
#define N 1005
typedef long long ll;
using namespace std;
bool r[N][N];
int c[N][N];
int a[N*2];
vector<pair<int,int> >v;
void detect(int x,int y){
	r[x][y]=1;
	a[x+y]--;
	if(r[x+1][y-1]==1){
		if(r[x][y-1]==0){
			detect(x,y-1);
		}
		if(r[x+1][y]==0){
			detect(x+1,y);
		}
	}
	if(r[x-1][y+1]==1){
		if(r[x-1][y]==0){
			detect(x-1,y);
		}
		if(r[x][y+1]==0){
			detect(x,y+1);
		}
	}
}
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n,m;
	cin >> n >> m;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			cin >> c[i][j];
			if(c[i][j]==1) v.pb({i,j});
			a[i+j]++;
		}
	}
	for(int i=0;i<=n+1;i++){
		r[i][0]=1;
		r[i][m+1]=1;
	}
	for(int i=0;i<=m+1;i++){
		r[0][i]=1;
		r[n+1][i]=1;
	}
	for(pair<int,int>fur:v){
		if(r[fur.ff][fur.ss]==0) detect(fur.ff,fur.ss);
	}
	int q;
	cin >> q;
	while(q--){
		int x,y;
		cin >> x >> y;
		if(r[x][y]==1){
			cout << 1 << '\n';
		}
		else{
			if(a[x+y]>1){
				cout << 1 << '\n';
				detect(x,y);
			}
			else cout << 0 << '\n';
		}
	}
}

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