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답안 #639033

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
639033 2022-09-08T10:21:46 Z thienbao1602 경주 (Race) (IOI11_race) C++17
100 / 100
 476 ms 106920 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pii;

#define pb push_back

#define f first
#define s second

const int maxn = 2e5 + 1;
vector<pii> adj[maxn];
map<ll, ll> info[maxn];
ll dist[maxn], sum[maxn];  // define these relative to root
int N, K;
ll ret;

void precomp(int u, int p, ll c, int h)
{
	info[u][c] = h;
	sum[u] = c;
	dist[u] = h;
	for (auto n : adj[u])
	{
		if (p == n.f)
		{
			continue;
		}
		precomp(n.f, u, c + n.s, h + 1);
	}
}

void small_to_large_merge(int u, int p)
{
	ll target = K + 2 * sum[u];
	for (auto n : adj[u])
	{
		if (n.f == p)
		{
			continue;
		}
		small_to_large_merge(n.f, u);
		if (info[n.f].size() > info[u].size())
		{
			swap(info[n.f], info[u]);
		}
		for (auto i : info[n.f])
		{
			if (info[u].find(target - i.f) != info[u].end())
			{
				ret = min(ret, info[u][target - i.f] + i.s - 2 * dist[u]);
			}
		}
		for (auto i : info[n.f])
		{
			if (info[u].find(i.f) == info[u].end())
			{
				info[u].insert(i);
			}
			else
			{
				info[u][i.f] = min(info[u][i.f], i.s);
			}
		}
	}
}

int best_path(int n, int k, int edges[][2], int weights[])
{
	if (k == 1)
	{
		return 0;
	}
	N = n;
	K = k;
	ret = INT_MAX;
	for (int i = 0; i < n - 1; i++)
	{
		int u = edges[i][0];
		int v = edges[i][1];
		adj[u].pb(pii(v, weights[i]));
		adj[v].pb(pii(u, weights[i]));
	}
	precomp(0, -1, 0, 0);
	small_to_large_merge(0, -1);
	return ret == INT_MAX ? -1 : ret;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14420 KB Output is correct
2 Correct 8 ms 14344 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14400 KB Output is correct
6 Correct 7 ms 14396 KB Output is correct
7 Correct 7 ms 14396 KB Output is correct
8 Correct 7 ms 14404 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 7 ms 14396 KB Output is correct
15 Correct 8 ms 14436 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14408 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14420 KB Output is correct
2 Correct 8 ms 14344 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14400 KB Output is correct
6 Correct 7 ms 14396 KB Output is correct
7 Correct 7 ms 14396 KB Output is correct
8 Correct 7 ms 14404 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 7 ms 14396 KB Output is correct
15 Correct 8 ms 14436 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14408 KB Output is correct
19 Correct 8 ms 14420 KB Output is correct
20 Correct 8 ms 14540 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 8 ms 14668 KB Output is correct
23 Correct 11 ms 14676 KB Output is correct
24 Correct 9 ms 14632 KB Output is correct
25 Correct 9 ms 14676 KB Output is correct
26 Correct 10 ms 14676 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 9 ms 14664 KB Output is correct
29 Correct 9 ms 14676 KB Output is correct
30 Correct 8 ms 14732 KB Output is correct
31 Correct 9 ms 14720 KB Output is correct
32 Correct 9 ms 14676 KB Output is correct
33 Correct 9 ms 14676 KB Output is correct
34 Correct 8 ms 14668 KB Output is correct
35 Correct 8 ms 14676 KB Output is correct
36 Correct 8 ms 14676 KB Output is correct
37 Correct 8 ms 14676 KB Output is correct
38 Correct 8 ms 14676 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14420 KB Output is correct
2 Correct 8 ms 14344 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14400 KB Output is correct
6 Correct 7 ms 14396 KB Output is correct
7 Correct 7 ms 14396 KB Output is correct
8 Correct 7 ms 14404 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 7 ms 14396 KB Output is correct
15 Correct 8 ms 14436 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14408 KB Output is correct
19 Correct 132 ms 39228 KB Output is correct
20 Correct 148 ms 39192 KB Output is correct
21 Correct 130 ms 38816 KB Output is correct
22 Correct 141 ms 38416 KB Output is correct
23 Correct 177 ms 51396 KB Output is correct
24 Correct 125 ms 41428 KB Output is correct
25 Correct 118 ms 39968 KB Output is correct
26 Correct 61 ms 48124 KB Output is correct
27 Correct 201 ms 51660 KB Output is correct
28 Correct 309 ms 93732 KB Output is correct
29 Correct 309 ms 91876 KB Output is correct
30 Correct 206 ms 51700 KB Output is correct
31 Correct 206 ms 51688 KB Output is correct
32 Correct 295 ms 51708 KB Output is correct
33 Correct 274 ms 57392 KB Output is correct
34 Correct 353 ms 89376 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 14420 KB Output is correct
2 Correct 8 ms 14344 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 8 ms 14400 KB Output is correct
6 Correct 7 ms 14396 KB Output is correct
7 Correct 7 ms 14396 KB Output is correct
8 Correct 7 ms 14404 KB Output is correct
9 Correct 8 ms 14420 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 8 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 7 ms 14396 KB Output is correct
15 Correct 8 ms 14436 KB Output is correct
16 Correct 7 ms 14420 KB Output is correct
17 Correct 8 ms 14420 KB Output is correct
18 Correct 7 ms 14408 KB Output is correct
19 Correct 8 ms 14420 KB Output is correct
20 Correct 8 ms 14540 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 8 ms 14668 KB Output is correct
23 Correct 11 ms 14676 KB Output is correct
24 Correct 9 ms 14632 KB Output is correct
25 Correct 9 ms 14676 KB Output is correct
26 Correct 10 ms 14676 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 9 ms 14664 KB Output is correct
29 Correct 9 ms 14676 KB Output is correct
30 Correct 8 ms 14732 KB Output is correct
31 Correct 9 ms 14720 KB Output is correct
32 Correct 9 ms 14676 KB Output is correct
33 Correct 9 ms 14676 KB Output is correct
34 Correct 8 ms 14668 KB Output is correct
35 Correct 8 ms 14676 KB Output is correct
36 Correct 8 ms 14676 KB Output is correct
37 Correct 8 ms 14676 KB Output is correct
38 Correct 8 ms 14676 KB Output is correct
39 Correct 132 ms 39228 KB Output is correct
40 Correct 148 ms 39192 KB Output is correct
41 Correct 130 ms 38816 KB Output is correct
42 Correct 141 ms 38416 KB Output is correct
43 Correct 177 ms 51396 KB Output is correct
44 Correct 125 ms 41428 KB Output is correct
45 Correct 118 ms 39968 KB Output is correct
46 Correct 61 ms 48124 KB Output is correct
47 Correct 201 ms 51660 KB Output is correct
48 Correct 309 ms 93732 KB Output is correct
49 Correct 309 ms 91876 KB Output is correct
50 Correct 206 ms 51700 KB Output is correct
51 Correct 206 ms 51688 KB Output is correct
52 Correct 295 ms 51708 KB Output is correct
53 Correct 274 ms 57392 KB Output is correct
54 Correct 353 ms 89376 KB Output is correct
55 Correct 22 ms 17876 KB Output is correct
56 Correct 16 ms 16468 KB Output is correct
57 Correct 76 ms 36648 KB Output is correct
58 Correct 50 ms 29104 KB Output is correct
59 Correct 92 ms 54428 KB Output is correct
60 Correct 306 ms 93368 KB Output is correct
61 Correct 235 ms 55792 KB Output is correct
62 Correct 211 ms 52404 KB Output is correct
63 Correct 295 ms 52444 KB Output is correct
64 Correct 454 ms 106920 KB Output is correct
65 Correct 476 ms 104568 KB Output is correct
66 Correct 323 ms 88492 KB Output is correct
67 Correct 191 ms 44840 KB Output is correct
68 Correct 366 ms 68280 KB Output is correct
69 Correct 388 ms 72944 KB Output is correct
70 Correct 348 ms 65996 KB Output is correct