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Submission #991855

# Submission time Handle Problem Language Result Execution time Memory
991855 2024-06-03T09:04:47 Z phoenix Race (IOI11_race) C++17
100 / 100
 262 ms 34644 KB 
#include "race.h"
#include <bits/stdc++.h>

using namespace std;

const int N = 200200;
const int L = 2000000;
const int INF = 1e9;

struct edge {
	int to;
	int w;
};	

int n, k;

int sz[N];
bool rmv[N];
vector<edge> g[N];

int calc(int s, int p) {
	sz[s] = 1;
	for (auto [to, w] : g[s]) {
		if (to == p || rmv[to]) continue;
		sz[s] += calc(to, s);
	} 
	return sz[s];
}

int find_centroid(int s, int p, int m) {
	for (auto [to, w] : g[s]) {
		if (to == p || rmv[to]) continue;
		if (sz[to] * 2 > m)
			return find_centroid(to, s, m);
	}
	return s;
}

int answer;
int mp[L];

void get_answer(int s, int p, int dep, int len) {
	if (len <= k)
		answer = min(answer, mp[k - len] + dep);
	for (auto [to, w] : g[s]) {
		if (to == p || rmv[to]) continue;
		get_answer(to, s, dep + 1, len + w);
	}
}

void add_to_map(int s, int p, int dep, int len) {
	if (len <= k)
		mp[len] = min(mp[len], dep);
	for (auto [to, w] : g[s]) {
		if (to == p || rmv[to]) continue;
		add_to_map(to, s, dep + 1, len + w);
	}
}

void clear_map(int s, int p, int dep, int len) {
	if (len <= k)
		mp[len] = INF;
	for (auto [to, w] : g[s]) {
		if (to == p || rmv[to]) continue;
		clear_map(to, s, dep + 1, len + w);
	}
}


void decompose(int s) {
	int C = find_centroid(s, s, calc(s, s));

	mp[0] = 0;
	for (auto [to, w] : g[C]) {
		if (rmv[to]) continue;
		get_answer(to, C, 1, w);
		add_to_map(to, C, 1, w);
	}
	for (auto [to, w] : g[C]) {
		if (rmv[to]) continue;
		clear_map(to, C, 1, w);
	}
	mp[0] = INF;

	rmv[C] = true;
	for (auto [to, w] : g[C]) {
		if (!rmv[to])
			decompose(to);
	}
}


int best_path(int n_inside, int k_inside, int H[][2], int L[]) {	
	n = n_inside;
	k = k_inside;
	for (int i = 0; i < n - 1; i++) {
		g[H[i][0]].push_back({H[i][1], L[i]});
		g[H[i][1]].push_back({H[i][0], L[i]});
	}

	answer = INF;
	for (int x = 0; x <= k; x++)
		mp[x] = INF;

	decompose(1);
	if (answer == INF)
		return -1;
	return answer;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10584 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 1 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 2 ms 10620 KB Output is correct
12 Correct 1 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 1 ms 10588 KB Output is correct
16 Correct 2 ms 10588 KB Output is correct
17 Correct 1 ms 10588 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10584 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 1 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 2 ms 10620 KB Output is correct
12 Correct 1 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 1 ms 10588 KB Output is correct
16 Correct 2 ms 10588 KB Output is correct
17 Correct 1 ms 10588 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 2 ms 10588 KB Output is correct
20 Correct 3 ms 10588 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 3 ms 14684 KB Output is correct
23 Correct 3 ms 14684 KB Output is correct
24 Correct 2 ms 14684 KB Output is correct
25 Correct 3 ms 14684 KB Output is correct
26 Correct 3 ms 12636 KB Output is correct
27 Correct 3 ms 14812 KB Output is correct
28 Correct 2 ms 12636 KB Output is correct
29 Correct 2 ms 12636 KB Output is correct
30 Correct 2 ms 12636 KB Output is correct
31 Correct 3 ms 14804 KB Output is correct
32 Correct 2 ms 14684 KB Output is correct
33 Correct 3 ms 14684 KB Output is correct
34 Correct 2 ms 12636 KB Output is correct
35 Correct 2 ms 14684 KB Output is correct
36 Correct 3 ms 14796 KB Output is correct
37 Correct 2 ms 14684 KB Output is correct
38 Correct 3 ms 12636 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10584 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 1 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 2 ms 10620 KB Output is correct
12 Correct 1 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 1 ms 10588 KB Output is correct
16 Correct 2 ms 10588 KB Output is correct
17 Correct 1 ms 10588 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 101 ms 17024 KB Output is correct
20 Correct 100 ms 17748 KB Output is correct
21 Correct 93 ms 17492 KB Output is correct
22 Correct 76 ms 18264 KB Output is correct
23 Correct 68 ms 18540 KB Output is correct
24 Correct 39 ms 18168 KB Output is correct
25 Correct 115 ms 23220 KB Output is correct
26 Correct 84 ms 23380 KB Output is correct
27 Correct 133 ms 22612 KB Output is correct
28 Correct 256 ms 33108 KB Output is correct
29 Correct 250 ms 29524 KB Output is correct
30 Correct 116 ms 23180 KB Output is correct
31 Correct 119 ms 23380 KB Output is correct
32 Correct 144 ms 23248 KB Output is correct
33 Correct 182 ms 22096 KB Output is correct
34 Correct 192 ms 22520 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 2 ms 10584 KB Output is correct
3 Correct 2 ms 10588 KB Output is correct
4 Correct 1 ms 10588 KB Output is correct
5 Correct 2 ms 10588 KB Output is correct
6 Correct 1 ms 10588 KB Output is correct
7 Correct 2 ms 10588 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct
9 Correct 1 ms 10588 KB Output is correct
10 Correct 1 ms 10588 KB Output is correct
11 Correct 2 ms 10620 KB Output is correct
12 Correct 1 ms 10588 KB Output is correct
13 Correct 1 ms 10588 KB Output is correct
14 Correct 2 ms 10588 KB Output is correct
15 Correct 1 ms 10588 KB Output is correct
16 Correct 2 ms 10588 KB Output is correct
17 Correct 1 ms 10588 KB Output is correct
18 Correct 1 ms 10588 KB Output is correct
19 Correct 2 ms 10588 KB Output is correct
20 Correct 3 ms 10588 KB Output is correct
21 Correct 3 ms 10588 KB Output is correct
22 Correct 3 ms 14684 KB Output is correct
23 Correct 3 ms 14684 KB Output is correct
24 Correct 2 ms 14684 KB Output is correct
25 Correct 3 ms 14684 KB Output is correct
26 Correct 3 ms 12636 KB Output is correct
27 Correct 3 ms 14812 KB Output is correct
28 Correct 2 ms 12636 KB Output is correct
29 Correct 2 ms 12636 KB Output is correct
30 Correct 2 ms 12636 KB Output is correct
31 Correct 3 ms 14804 KB Output is correct
32 Correct 2 ms 14684 KB Output is correct
33 Correct 3 ms 14684 KB Output is correct
34 Correct 2 ms 12636 KB Output is correct
35 Correct 2 ms 14684 KB Output is correct
36 Correct 3 ms 14796 KB Output is correct
37 Correct 2 ms 14684 KB Output is correct
38 Correct 3 ms 12636 KB Output is correct
39 Correct 101 ms 17024 KB Output is correct
40 Correct 100 ms 17748 KB Output is correct
41 Correct 93 ms 17492 KB Output is correct
42 Correct 76 ms 18264 KB Output is correct
43 Correct 68 ms 18540 KB Output is correct
44 Correct 39 ms 18168 KB Output is correct
45 Correct 115 ms 23220 KB Output is correct
46 Correct 84 ms 23380 KB Output is correct
47 Correct 133 ms 22612 KB Output is correct
48 Correct 256 ms 33108 KB Output is correct
49 Correct 250 ms 29524 KB Output is correct
50 Correct 116 ms 23180 KB Output is correct
51 Correct 119 ms 23380 KB Output is correct
52 Correct 144 ms 23248 KB Output is correct
53 Correct 182 ms 22096 KB Output is correct
54 Correct 192 ms 22520 KB Output is correct
55 Correct 11 ms 11100 KB Output is correct
56 Correct 8 ms 11100 KB Output is correct
57 Correct 46 ms 17252 KB Output is correct
58 Correct 21 ms 18128 KB Output is correct
59 Correct 67 ms 25556 KB Output is correct
60 Correct 261 ms 33604 KB Output is correct
61 Correct 118 ms 22776 KB Output is correct
62 Correct 117 ms 27184 KB Output is correct
63 Correct 132 ms 27220 KB Output is correct
64 Correct 243 ms 23892 KB Output is correct
65 Correct 172 ms 24272 KB Output is correct
66 Correct 262 ms 34644 KB Output is correct
67 Correct 66 ms 28868 KB Output is correct
68 Correct 142 ms 27728 KB Output is correct
69 Correct 121 ms 25648 KB Output is correct
70 Correct 131 ms 27732 KB Output is correct