oj.uz

Submission #827228

# Submission time Handle Problem Language Result Execution time Memory
827228 2023-08-16T10:01:28 Z Sohsoh84 Fountain Parks (IOI21_parks) C++17
15 / 100
 556 ms 45432 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 X[i] - Y[i] < 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 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 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 308 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 402 ms 43788 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 132 ms 17736 KB Output is correct
29 Correct 221 ms 26424 KB Output is correct
30 Correct 297 ms 35076 KB Output is correct
31 Correct 394 ms 43804 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 308 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 308 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 572 KB Output is correct
44 Correct 2 ms 724 KB Output is correct
45 Correct 154 ms 22036 KB Output is correct
46 Correct 238 ms 31764 KB Output is correct
47 Correct 238 ms 31752 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 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 308 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 402 ms 43788 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 132 ms 17736 KB Output is correct
29 Correct 221 ms 26424 KB Output is correct
30 Correct 297 ms 35076 KB Output is correct
31 Correct 394 ms 43804 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 308 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 308 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 572 KB Output is correct
44 Correct 2 ms 724 KB Output is correct
45 Correct 154 ms 22036 KB Output is correct
46 Correct 238 ms 31764 KB Output is correct
47 Correct 238 ms 31752 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 308 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 389 ms 43732 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 2 ms 700 KB Output is correct
58 Correct 9 ms 1620 KB Output is correct
59 Correct 7 ms 1616 KB Output is correct
60 Correct 153 ms 21868 KB Output is correct
61 Correct 224 ms 29392 KB Output is correct
62 Correct 277 ms 36236 KB Output is correct
63 Correct 432 ms 43904 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 396 ms 44012 KB Output is correct
68 Correct 331 ms 43736 KB Output is correct
69 Correct 322 ms 43604 KB Output is correct
70 Correct 3 ms 828 KB Output is correct
71 Correct 6 ms 1328 KB Output is correct
72 Incorrect 105 ms 13628 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 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 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 308 KB Output is correct
20 Correct 393 ms 45120 KB Output is correct
21 Correct 556 ms 45132 KB Output is correct
22 Incorrect 348 ms 35392 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 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 KB Output is correct
17 Correct 442 ms 45176 KB Output is correct
18 Correct 409 ms 45432 KB Output is correct
19 Incorrect 378 ms 28064 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 0 ms 212 KB Output is correct
2 Correct 1 ms 304 KB Output is correct
3 Correct 1 ms 308 KB Output is correct
4 Correct 1 ms 312 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 308 KB Output is correct
9 Correct 133 ms 22052 KB Output is correct
10 Correct 10 ms 2516 KB Output is correct
11 Correct 60 ms 11892 KB Output is correct
12 Correct 15 ms 3648 KB Output is correct
13 Correct 30 ms 5928 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 139 ms 22056 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 308 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 402 ms 43788 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 3 ms 724 KB Output is correct
27 Correct 3 ms 724 KB Output is correct
28 Correct 132 ms 17736 KB Output is correct
29 Correct 221 ms 26424 KB Output is correct
30 Correct 297 ms 35076 KB Output is correct
31 Correct 394 ms 43804 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 308 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 308 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 2 ms 572 KB Output is correct
44 Correct 2 ms 724 KB Output is correct
45 Correct 154 ms 22036 KB Output is correct
46 Correct 238 ms 31764 KB Output is correct
47 Correct 238 ms 31752 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 308 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 1 ms 212 KB Output is correct
55 Correct 389 ms 43732 KB Output is correct
56 Correct 1 ms 212 KB Output is correct
57 Correct 2 ms 700 KB Output is correct
58 Correct 9 ms 1620 KB Output is correct
59 Correct 7 ms 1616 KB Output is correct
60 Correct 153 ms 21868 KB Output is correct
61 Correct 224 ms 29392 KB Output is correct
62 Correct 277 ms 36236 KB Output is correct
63 Correct 432 ms 43904 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 1 ms 212 KB Output is correct
67 Correct 396 ms 44012 KB Output is correct
68 Correct 331 ms 43736 KB Output is correct
69 Correct 322 ms 43604 KB Output is correct
70 Correct 3 ms 828 KB Output is correct
71 Correct 6 ms 1328 KB Output is correct
72 Incorrect 105 ms 13628 KB Solution announced impossible, but it is possible.
73 Halted 0 ms 0 KB -