oj.uz

Submission #1059668

# Submission time Handle Problem Language Result Execution time Memory
1059668 2024-08-15T06:55:28 Z Gromp15 Fountain Parks (IOI21_parks) C++17
5 / 100
 320 ms 41300 KB 
#include <bits/stdc++.h>
#include "parks.h"
#define ar array
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
using namespace std;
template<typename T> bool ckmin(T &a, const T &b) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }

struct dsu {
	vector<int> p, size;
	dsu(int n) : p(n), size(n, 1) {
		iota(all(p), 0);
	}
	int get(int v) {
		return v == p[v] ? v : p[v] = get(p[v]);
	}
	bool merge(int a, int b) {
		a = get(a), b = get(b);
		if (a == b) return 0;
		if (size[a] < size[b]) swap(a, b);
		size[a] += size[b], p[b] = a;
		return 1;
	}
};

int construct_roads(std::vector<int> x, std::vector<int> y) {
	int n = sz(x);
	map<ar<int, 4>, int> mp;
	map<ar<int, 2>, int> idx;
	for (int i = 0; i < n; i++) idx[{x[i], y[i]}] = i;
	vector<int> a(n-1), b(n-1), c(n-1), d(n-1);
	dsu D(n);
	int now = 0;
	vector<ar<int, 3>> ord(n);
	for (int i = 0; i < n; i++) ord[i] = {x[i], y[i], i};
	sort(all(ord));
	set<ar<int, 2>> used;
	for (int i = 0; i < n; i++) {
		int r = i;
		while (r+1 < n && ord[r+1][0] == ord[r][0] && ord[r+1][1] == ord[r][1] + 2) r++;
		for (int j = i; j < r; j++) {
			assert(D.merge(ord[j][2], ord[j+1][2]));
			a[now] = ord[j][2], b[now] = ord[j+1][2];
			if ((j - i) % 2 == 0) {
				c[now] = ord[j][0] - 1, d[now] = ord[j][1] + 1;
			}
			else {
				c[now] = ord[j][0] + 1, d[now] = ord[j][1] + 1;
			}
			//cout << "M " << ord[j][0] << " " << ord[j][1] << " " << ord[j+1][0] << " " << ord[j+1][1] << '\n';
			used.insert({c[now], d[now]});
			now++;
		}
		i = r;
	}
	for (auto [x, y, i] : ord) {
		if (idx.count({x + 2, y})) {
			int pos = idx[{x+2, y}];
			if (D.get(pos) == D.get(i)) continue;
			for (int v : {-1, 1}) if (!used.count({x + 1, y + v})) {
				D.merge(pos, i);
				a[now] = i, b[now] = pos;
				c[now] = x + 1, d[now] = y + v;
				used.insert({x + 1, y + v});
				now++;
				break;
			}
		}
	}
	/*
	map<ar<int, 2>, int> adj;
	for (int i = 0; i < n; i++) {
		if (idx.count({x[i] + 2, y[i]})) {
			mp[{x[i], y[i], x[i] + 2, y[i]}] += 2;
			adj[{x[i] + 1, y[i] + 1}]++;
			adj[{x[i] + 1, y[i] - 1}]++;
		}
		if (idx.count({x[i], y[i] + 2})) {
			mp[{x[i], y[i], x[i], y[i] + 2}] += 2;
			adj[{x[i] + 1, y[i] + 1}]++;
			adj[{x[i] - 1, y[i] + 1}]++;
		}
	}
	set<pair<int, ar<int, 2>>> q;
	for (auto [x, y] : adj) q.insert({y, x});
	set<ar<int, 2>> used;
	while (q.size()) {
		auto [val, p] = *q.begin();
		q.erase(q.begin());
		if (val != adj[p]) {
			if (adj[p]) {
				q.insert({adj[p], p});
				continue;
			}
		}
		ar<int, 4> seg2{p[0] - 1, p[1] - 1, p[0] - 1, p[1] + 1};
		ar<int, 4> seg3{p[0] + 1, p[1] - 1, p[0] + 1, p[1] + 1};
		ar<int, 4> seg4{p[0] - 1, p[1] - 1, p[0] + 1, p[1] - 1};
		ar<int, 4> seg5{p[0] - 1, p[1] + 1, p[0] + 1, p[1] + 1};
		bool F = 0;
		for (int tp = 0; tp <= 4; tp++) {
			for (auto& seg : {seg2, seg3, seg4, seg5}) if (mp.count(seg) && mp[seg] == tp) {
				int i1 = idx[{seg[0], seg[1]}], i2 = idx[{seg[2], seg[3]}];
				ar<int, 2> pt, pt2;
				if (seg[0] != seg[2]) {
					pt = {seg[0] + 1, seg[1] - 1};
					pt2 = {seg[0] + 1, seg[1] + 1};
				}
				else {
					pt = {seg[0] - 1, seg[1] + 1};
					pt2 = {seg[0] + 1, seg[1] + 1};
				}
				for (auto p : {pt, pt2}) adj[p]--;
				if (!F && D.get(i1) != D.get(i2)) {
					F = 1;
					D.merge(i1, i2);
					a[now] = i1, b[now] = i2;
					c[now] = p[0], d[now] = p[1];
					now++;
				}
			}
		}
		if (F) for (auto& seg : {seg2, seg3, seg4, seg5}) if (mp.count(seg)) mp[seg]--;
	}
	*/
	if (D.size[D.get(0)] != n) return 0;
	build(a, b, c, d);
	return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 40336 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 756 KB Output is correct
27 Correct 3 ms 860 KB Output is correct
28 Correct 76 ms 16352 KB Output is correct
29 Correct 131 ms 24404 KB Output is correct
30 Correct 167 ms 32340 KB Output is correct
31 Correct 224 ms 40392 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Incorrect 95 ms 16976 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 40336 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 756 KB Output is correct
27 Correct 3 ms 860 KB Output is correct
28 Correct 76 ms 16352 KB Output is correct
29 Correct 131 ms 24404 KB Output is correct
30 Correct 167 ms 32340 KB Output is correct
31 Correct 224 ms 40392 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Incorrect 95 ms 16976 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 254 ms 41300 KB Output is correct
21 Correct 282 ms 41044 KB Output is correct
22 Correct 320 ms 41044 KB Output is correct
23 Correct 217 ms 34644 KB Output is correct
24 Correct 180 ms 24656 KB Output is correct
25 Correct 267 ms 34120 KB Output is correct
26 Correct 216 ms 34120 KB Output is correct
27 Correct 259 ms 40288 KB Output is correct
28 Correct 251 ms 40260 KB Output is correct
29 Correct 286 ms 40276 KB Output is correct
30 Correct 278 ms 40272 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Incorrect 11 ms 2648 KB Solution announced impossible, but it is possible.
33 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct
17 Correct 248 ms 40804 KB Output is correct
18 Correct 260 ms 40808 KB Output is correct
19 Correct 276 ms 41036 KB Output is correct
20 Correct 250 ms 39424 KB Output is correct
21 Correct 236 ms 35412 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Incorrect 25 ms 5648 KB Solution announced impossible, but it is possible.
24 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 352 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 96 ms 20384 KB Output is correct
10 Correct 7 ms 2392 KB Output is correct
11 Correct 38 ms 11100 KB Output is correct
12 Correct 10 ms 3500 KB Output is correct
13 Correct 25 ms 7772 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 102 ms 20220 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 222 ms 40336 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 2 ms 756 KB Output is correct
27 Correct 3 ms 860 KB Output is correct
28 Correct 76 ms 16352 KB Output is correct
29 Correct 131 ms 24404 KB Output is correct
30 Correct 167 ms 32340 KB Output is correct
31 Correct 224 ms 40392 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Incorrect 95 ms 16976 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -