oj.uz

Submission #827205

# Submission time Handle Problem Language Result Execution time Memory
827205 2023-08-16T09:53:56 Z Sohsoh84 Fountain Parks (IOI21_parks) C++17
15 / 100
 553 ms 46340 KB 
#include "parks.h"
#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pll;

#define all(x)		(x).begin(), (x).end()
#define X		first
#define Y		second
#define sep		' '
#define debug(x)	cerr << #x << ": " << x << endl;

const int MAXN = 1e6 + 10;
const int DX[4] = {-1, 0, 1, 0};
const int DY[4] = {0, -1, 0, 1};

namespace answer {
	vector<int> u, v, a, b;
}

vector<pair<pll, int>> edges;

int X[MAXN], Y[MAXN], par[MAXN], n;
map<pll, int> mp;

int find(int v) {
	return par[v] == v ? v : par[v] = find(par[v]);
}

inline bool unite(int u_, int v_) {
	int u = find(u_), v = find(v_);
	if (u == v) return false;

	edges.push_back({{u_, v_}, (int)answer::u.size()});

	answer::u.push_back(u_);
	answer::v.push_back(v_);
	par[u] = v;

	return true;
}

int construct_roads(vector<int> x_, vector<int> y_) {
	n = x_.size();
	for (int i = 0; i < n; i++) {
		X[i] = x_[i];
		Y[i] = y_[i];

		mp[pll(X[i], Y[i])] = i;
		par[i] = i;
	}

	int edg = 0;
	vector<int> vert_vec;
	for (int i = 0; i < n; i++) vert_vec.push_back(i);
	sort(all(vert_vec), [] (int i, int j) {
		return Y[i] < Y[j];
	});

	for (int i = 0; i < 4; i++) {
		for (int tv = 0; tv < n; tv++) {
			int v = vert_vec[tv];

			int ux = X[v] + 2 * DX[i], uy = Y[v] + 2 * DY[i];
			auto it = mp.find(pll(ux, uy));
			if (it == mp.end()) continue;

			int u = it -> second;	
			edg += unite(u, v);
		}
	}

	if (edg < n - 1) return 0;

	sort(all(edges), [] (const pair<pll, int>& a, const pair<pll, int>& b) {
		return min(X[a.X.X] + Y[a.X.X], X[a.X.Y] + Y[a.X.Y]) < min(X[b.X.X] + Y[b.X.X], X[a.X.Y] + Y[a.X.Y]);
	});

	set<pll> st;
	answer::a.resize(n - 1);
	answer::b.resize(n - 1);

	for (int ti = 0; ti < n - 1; ti++) {
		int i = edges[ti].Y;

//		cerr  << answer::u[i] << sep << answer::v[i] << endl;
		if (X[answer::u[i]] == X[answer::v[i]]) {
			int tx = X[answer::u[i]] - 1, ty = (Y[answer::u[i]] + Y[answer::v[i]]) / 2;	
			if (st.find(pll(tx, ty)) == st.end()) {
				st.insert(pll(tx, ty));
				answer::a[i] = tx;	
				answer::b[i] = ty;	
				continue;
			}

			tx += 2;
			if (st.find(pll(tx, ty)) == st.end()) {
				st.insert(pll(tx, ty));
				answer::a[i] = tx;	
				answer::b[i] = ty;	
				continue;
			}

			return 0;
		} else {
			int ty = Y[answer::u[i]] - 1, tx = (X[answer::u[i]] + X[answer::v[i]]) / 2;	
			if (st.find(pll(tx, ty)) == st.end()) {
				st.insert(pll(tx, ty));
				answer::a[i] = tx;	
				answer::b[i] = ty;	
				continue;
			}

			ty += 2;
			if (st.find(pll(tx, ty)) == st.end()) {
				st.insert(pll(tx, ty));
				answer::a[i] = tx;	
				answer::b[i] = ty;	
				continue;
			}

			return 0;
		}
	}

	build(answer::u, answer::v, answer::a, answer::b);
	return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 44996 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 576 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 176 ms 18124 KB Output is correct
29 Correct 216 ms 27116 KB Output is correct
30 Correct 401 ms 36020 KB Output is correct
31 Correct 510 ms 44940 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 312 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 304 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 724 KB Output is correct
45 Correct 212 ms 22908 KB Output is correct
46 Correct 312 ms 32968 KB Output is correct
47 Correct 227 ms 33000 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 44996 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 576 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 176 ms 18124 KB Output is correct
29 Correct 216 ms 27116 KB Output is correct
30 Correct 401 ms 36020 KB Output is correct
31 Correct 510 ms 44940 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 312 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 304 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 724 KB Output is correct
45 Correct 212 ms 22908 KB Output is correct
46 Correct 312 ms 32968 KB Output is correct
47 Correct 227 ms 33000 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Incorrect 295 ms 27500 KB Solution announced impossible, but it is possible.
56 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 398 ms 46340 KB Output is correct
21 Correct 422 ms 45964 KB Output is correct
22 Incorrect 317 ms 28544 KB Solution announced impossible, but it is possible.
23 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct
17 Correct 435 ms 45480 KB Output is correct
18 Correct 447 ms 45684 KB Output is correct
19 Incorrect 305 ms 29316 KB Solution announced impossible, but it is possible.
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 308 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 158 ms 23228 KB Output is correct
10 Correct 10 ms 2716 KB Output is correct
11 Correct 64 ms 12544 KB Output is correct
12 Correct 20 ms 3872 KB Output is correct
13 Correct 37 ms 6360 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 191 ms 23188 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 44996 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 576 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 4 ms 724 KB Output is correct
28 Correct 176 ms 18124 KB Output is correct
29 Correct 216 ms 27116 KB Output is correct
30 Correct 401 ms 36020 KB Output is correct
31 Correct 510 ms 44940 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 256 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 312 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 304 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 468 KB Output is correct
44 Correct 3 ms 724 KB Output is correct
45 Correct 212 ms 22908 KB Output is correct
46 Correct 312 ms 32968 KB Output is correct
47 Correct 227 ms 33000 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Incorrect 295 ms 27500 KB Solution announced impossible, but it is possible.
56 Halted 0 ms 0 KB -