oj.uz

Submission #570491

# Submission time Handle Problem Language Result Execution time Memory
570491 2022-05-30T08:38:03 Z 8e7 Fountain Parks (IOI21_parks) C++17
5 / 100
 292 ms 63748 KB 
//Challenge: Accepted
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 200005
#define pii pair<ll, ll>
#define ff first
#define ss second
vector<pii> xv[maxn], yv[maxn];
unordered_map<ll, vector<pii> > adj;
unordered_map<ll, bool> vis;
ll h(int x, int y) {
	return (ll)x * maxn + y;
}


struct DSU{
	int par[maxn];
	int merges = 0;
	void init(int n) {
		for (int i = 0;i < n;i++) par[i] = i;
	}
	int find(int a) {
		return a == par[a] ? a : (par[a] = find(par[a]));
	}
	void Union(int a, int b) {
		a = find(a), b = find(b);
		if (a == b) return;
		merges++;
		par[a] = b;
	}
} dsu;
vector<int> u, v, a, b;
void dfs(ll n, ll prv) {
	vis[n] = 1;
	for (auto p:adj[n]) {
		if (p.ff != prv) {
			u.push_back(p.ss / maxn);
			v.push_back(p.ss % maxn);
			a.push_back(n / maxn);
			b.push_back(n % maxn);
			if (!vis[p.ff]) dfs(p.ff, n);
		}
	}
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
	int n = x.size();
	dsu.init(n);
	for (int i = 0;i < n;i++) {
		xv[x[i]].push_back({y[i], i});
		yv[y[i]].push_back({x[i], i});
	}

	for (int i = 0;i < maxn;i += 2) {
		sort(xv[i].begin(), xv[i].end());
		sort(yv[i].begin(), yv[i].end());
		for (int j = 0;j < (int)xv[i].size() - 1;j++) {
			if (xv[i][j].ff + 2 == xv[i][j+1].ff) {
				dsu.Union(xv[i][j].ss, xv[i][j+1].ss);
				u.push_back(xv[i][j].ss);
				v.push_back(xv[i][j+1].ss);
				b.push_back(xv[i][j].ff + 1);
				if (i == 2) a.push_back(1);
				else a.push_back(7);
				/*
				ll ind = h(xv[i][j].ss, xv[i][j+1].ss), v1 = h(i-1, xv[i][j].ff + 1), v2 = h(i+1, xv[i][j].ff + 1);
				debug(v1, v2);
				adj[v1].push_back({v2, ind});
				adj[v2].push_back({v1, ind});
				*/
			}
		}
		for (int j = 0;j < (int)yv[i].size() - 1;j++) {
			if (yv[i][j].ff + 2 == yv[i][j+1].ff) {
				dsu.Union(yv[i][j].ss, yv[i][j+1].ss);
				ll ind = h(yv[i][j].ss, yv[i][j+1].ss), v1 = h(yv[i][j].ff + 1, i-1), v2 = h(yv[i][j].ff + 1, i+1);
				adj[v1].push_back({v2, ind});
				adj[v2].push_back({v1, ind});
			}
		}
	}
	{
		int i = 4;
		for (int j = 0;j < (int)xv[i].size() - 1;j++) {
			if (xv[i][j].ff + 2 == xv[i][j+1].ff) {
				if (dsu.find(xv[i][j].ss) == dsu.find(xv[i][j+1].ss)) continue;
				dsu.Union(xv[i][j].ss, xv[i][j+1].ss);
				ll ind = h(xv[i][j].ss, xv[i][j+1].ss), v1 = h(i-1, xv[i][j].ff + 1), v2 = h(i+1, xv[i][j].ff + 1);
				adj[v1].push_back({v2, ind});
				adj[v2].push_back({v1, ind});
			}
		}
	}
	if (dsu.merges != n - 1) return 0;
	for (auto i:adj) {
		if (i.ss.size() == 1 && !vis[i.ff]) dfs(i.ff, -1);
	}
	for (auto i:adj) {
		if (!vis[i.ff]) dfs(i.ff, i.ss[0].ff);
	}
	build(u, v, a, b);
	return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct
17 Incorrect 8 ms 9692 KB Tree (a[1], b[1]) = (7, 3) is not adjacent to edge between u[1]=2 @(4, 2) and v[1]=0 @(4, 4)
18 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct
17 Incorrect 8 ms 9692 KB Tree (a[1], b[1]) = (7, 3) is not adjacent to edge between u[1]=2 @(4, 2) and v[1]=0 @(4, 4)
18 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct
17 Incorrect 5 ms 9684 KB Tree (a[0], b[0]) = (7, 3) is not adjacent to edge between u[0]=0 @(200000, 2) and v[0]=1 @(200000, 4)
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct
17 Incorrect 292 ms 63748 KB Tree (a[50000], b[50000]) = (7, 3) is not adjacent to edge between u[50000]=138413 @(100002, 2) and v[50000]=87394 @(100002, 4)
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 7 ms 9684 KB Output is correct
3 Correct 6 ms 9684 KB Output is correct
4 Correct 6 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 6 ms 9700 KB Output is correct
7 Correct 6 ms 9700 KB Output is correct
8 Correct 7 ms 9704 KB Output is correct
9 Correct 103 ms 22672 KB Output is correct
10 Correct 14 ms 11080 KB Output is correct
11 Correct 38 ms 16608 KB Output is correct
12 Correct 15 ms 11728 KB Output is correct
13 Correct 18 ms 14036 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9812 KB Output is correct
16 Correct 80 ms 22700 KB Output is correct
17 Incorrect 8 ms 9692 KB Tree (a[1], b[1]) = (7, 3) is not adjacent to edge between u[1]=2 @(4, 2) and v[1]=0 @(4, 4)
18 Halted 0 ms 0 KB -