Submission #496053

#	Time	Username	Problem	Language	Result	Execution time	Memory
496053		minhcool	Furniture (JOI20_furniture)	C++17	0 / 100	918 ms	524292 KiB

furniture

#include<bits/stdc++.h>
using namespace std;

#define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)

typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;

const int N = 105;

const int oo = 1e18 + 7, mod = 1e9 + 7;

int n, m, c[N][N], q;

bool ck(){
	queue<ii> bfs;
	bfs.push({1, 1});
	while(!bfs.empty()){
		ii u = bfs.front();
		bfs.pop();
		if(u == make_pair(n, m)) return 1;
		if(u.se != m && c[u.fi][u.se + 1] == 0) bfs.push({u.fi, u.se + 1});
		if(u.fi != n && c[u.fi + 1][u.se] == 0) bfs.push({u.fi + 1, u.se});
	}
	return 0;
}

void process(){
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= m; j++) cin >> c[i][j];
	}
	cin >> q;
	while(q--){
		int x, y;
		cin >> x >> y;
		c[x][y] = 1;
		if(!ck()){
			cout << 0 << "\n";
			c[x][y] = 0;
		}
		else cout << 1 << "\n";
	}
}

signed main(){
	ios_base::sync_with_stdio(0);
	process();
}

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