Submission #568054

#	Time	Username	Problem	Language	Result	Execution time	Memory
568054		Karliver	Furniture (JOI20_furniture)	C++17	0 / 100	1 ms	340 KiB

furniture

#include <bits/stdc++.h>

using namespace std;
const int N = 2e5 + 10;



void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
 
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)

vector<pair<int, int>> dir{{1, 0}, {0, 1}};

void test_case() {
	int n, m;
	cin >> n >> m;
	
	vector<vector<int>> s(n, vector<int>(m));
	for(int j = 0;j < n;++j) for(int i = 0;i < m;++i) cin >> s[j][i];
	
	
	int q;
	cin >> q;
	vector<int> res(q+1, 1);
	vector<vector<int>> ps(n, vector<int>(m, q+1));
	for(int i = 0;i < n;++i) for(int j = 0;j < m;++j) if(s[i][j] == 1) ps[i][j] = 0;
	for(int j = 1;j <= q;++j) {
		int x, y;
		cin >> x >> y;
		--x;--y;
		ps[x][y] = j;
	}
	vector<vector<bool>> vis(n, vector<bool>(m, false));
	vector<vector<pair<int, int>>> par(n, vector<pair<int, int>>(m, {-1, -1}));
	function<void(int, int)> dfs = [&](int i, int j)  {
		vis[i][j] = 1;
		vector<array<int, 3>> candi;
		for(auto d1 : dir) {
			int x = d1.first + i, y = d1.second + j;
			if(x < n && y < m && !vis[x][y] && ps[x][y]) {
				candi.push_back({ps[x][y], x, y});
			}
		}
		if(candi.size() > 1 && candi[0][0] < candi[1][0])
			swap(candi[0], candi[1]);
		for(auto [d, a, b] : candi) {
			par[a][b] = {i, j};
			dfs(a, b);
		}
	};
	
	dfs(0, 0);
	
	
	int x = n - 1, y = m - 1;
	
	int len = 1;
	while(len != n + m -1) {
		assert(par[x][y].first != -1);
		if(ps[x][y] > 0 && ps[x][y] <= q) res[ps[x][y]] = 0;
		auto r = par[x][y];
		x = r.first, y = r.second;
		len += 1;
	}
	
	for(int j = 1;j <= q;++j) cout << res[j] << '\n';
	
	
	
}
					
		

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tt;
	tt = 1;
	//cin >> tt;
	while(tt--) {
		test_case();
	}
	
		
	return 0;
}
	
	
	
	
          
              
       

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