oj.uz

Submission #827238

# Submission time Handle Problem Language Result Execution time Memory
827238 2023-08-16T10:03:44 Z Sohsoh84 Fountain Parks (IOI21_parks) C++17
15 / 100
 553 ms 45936 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 min(X[i], Y[i]) < min(X[j], 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], X[a.X.Y]) + min(Y[a.X.X], Y[a.X.Y]) < min(X[b.X.X], X[b.X.Y]) + min(Y[b.X.X], Y[b.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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 43804 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 2 ms 724 KB Output is correct
27 Correct 3 ms 828 KB Output is correct
28 Correct 135 ms 17672 KB Output is correct
29 Correct 258 ms 26416 KB Output is correct
30 Correct 354 ms 35124 KB Output is correct
31 Correct 529 ms 43760 KB Output is correct
32 Correct 1 ms 288 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 304 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 304 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 304 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 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 178 ms 22140 KB Output is correct
46 Correct 358 ms 31736 KB Output is correct
47 Correct 304 ms 31740 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 43804 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 2 ms 724 KB Output is correct
27 Correct 3 ms 828 KB Output is correct
28 Correct 135 ms 17672 KB Output is correct
29 Correct 258 ms 26416 KB Output is correct
30 Correct 354 ms 35124 KB Output is correct
31 Correct 529 ms 43760 KB Output is correct
32 Correct 1 ms 288 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 304 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 304 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 304 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 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 178 ms 22140 KB Output is correct
46 Correct 358 ms 31736 KB Output is correct
47 Correct 304 ms 31740 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 0 ms 212 KB Output is correct
53 Correct 1 ms 304 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 507 ms 43732 KB Output is correct
56 Correct 0 ms 212 KB Output is correct
57 Correct 2 ms 700 KB Output is correct
58 Correct 7 ms 1620 KB Output is correct
59 Correct 8 ms 1604 KB Output is correct
60 Correct 186 ms 21936 KB Output is correct
61 Correct 307 ms 29448 KB Output is correct
62 Correct 396 ms 36264 KB Output is correct
63 Correct 518 ms 43852 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 419 ms 43772 KB Output is correct
68 Correct 410 ms 43824 KB Output is correct
69 Correct 426 ms 43564 KB Output is correct
70 Correct 3 ms 724 KB Output is correct
71 Correct 6 ms 1340 KB Output is correct
72 Incorrect 131 ms 13620 KB Solution announced impossible, but it is possible.
73 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 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 300 KB Output is correct
20 Correct 411 ms 45712 KB Output is correct
21 Correct 405 ms 45936 KB Output is correct
22 Incorrect 296 ms 31172 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 KB Output is correct
17 Correct 465 ms 45180 KB Output is correct
18 Correct 479 ms 45248 KB Output is correct
19 Incorrect 309 ms 28324 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 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 246 ms 22084 KB Output is correct
10 Correct 14 ms 2580 KB Output is correct
11 Correct 68 ms 11852 KB Output is correct
12 Correct 19 ms 3640 KB Output is correct
13 Correct 32 ms 5996 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 180 ms 22096 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 553 ms 43804 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 2 ms 724 KB Output is correct
27 Correct 3 ms 828 KB Output is correct
28 Correct 135 ms 17672 KB Output is correct
29 Correct 258 ms 26416 KB Output is correct
30 Correct 354 ms 35124 KB Output is correct
31 Correct 529 ms 43760 KB Output is correct
32 Correct 1 ms 288 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 304 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 304 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 304 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 212 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 178 ms 22140 KB Output is correct
46 Correct 358 ms 31736 KB Output is correct
47 Correct 304 ms 31740 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 0 ms 212 KB Output is correct
53 Correct 1 ms 304 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 507 ms 43732 KB Output is correct
56 Correct 0 ms 212 KB Output is correct
57 Correct 2 ms 700 KB Output is correct
58 Correct 7 ms 1620 KB Output is correct
59 Correct 8 ms 1604 KB Output is correct
60 Correct 186 ms 21936 KB Output is correct
61 Correct 307 ms 29448 KB Output is correct
62 Correct 396 ms 36264 KB Output is correct
63 Correct 518 ms 43852 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 0 ms 212 KB Output is correct
67 Correct 419 ms 43772 KB Output is correct
68 Correct 410 ms 43824 KB Output is correct
69 Correct 426 ms 43564 KB Output is correct
70 Correct 3 ms 724 KB Output is correct
71 Correct 6 ms 1340 KB Output is correct
72 Incorrect 131 ms 13620 KB Solution announced impossible, but it is possible.
73 Halted 0 ms 0 KB -