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Submission #625032

# Submission time Handle Problem Language Result Execution time Memory
625032 2022-08-09T09:18:26 Z Netr Race (IOI11_race) C++17
100 / 100
 465 ms 107488 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

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14336 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14340 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 8 ms 14384 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 9 ms 14432 KB Output is correct
15 Correct 11 ms 14348 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14336 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14340 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 8 ms 14384 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 9 ms 14432 KB Output is correct
15 Correct 11 ms 14348 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 7 ms 14424 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 9 ms 14756 KB Output is correct
23 Correct 8 ms 14676 KB Output is correct
24 Correct 9 ms 14676 KB Output is correct
25 Correct 9 ms 14644 KB Output is correct
26 Correct 11 ms 14704 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 8 ms 14624 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 9 ms 14696 KB Output is correct
31 Correct 9 ms 14640 KB Output is correct
32 Correct 8 ms 14676 KB Output is correct
33 Correct 8 ms 14676 KB Output is correct
34 Correct 8 ms 14676 KB Output is correct
35 Correct 9 ms 14660 KB Output is correct
36 Correct 10 ms 14620 KB Output is correct
37 Correct 8 ms 14548 KB Output is correct
38 Correct 9 ms 14676 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14336 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14340 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 8 ms 14384 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 9 ms 14432 KB Output is correct
15 Correct 11 ms 14348 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 150 ms 37776 KB Output is correct
20 Correct 143 ms 37804 KB Output is correct
21 Correct 138 ms 37580 KB Output is correct
22 Correct 134 ms 37084 KB Output is correct
23 Correct 181 ms 49964 KB Output is correct
24 Correct 125 ms 40012 KB Output is correct
25 Correct 120 ms 38712 KB Output is correct
26 Correct 68 ms 46796 KB Output is correct
27 Correct 204 ms 49712 KB Output is correct
28 Correct 302 ms 91644 KB Output is correct
29 Correct 310 ms 89804 KB Output is correct
30 Correct 203 ms 49636 KB Output is correct
31 Correct 247 ms 49832 KB Output is correct
32 Correct 291 ms 49712 KB Output is correct
33 Correct 292 ms 54580 KB Output is correct
34 Correct 356 ms 86516 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14420 KB Output is correct
2 Correct 8 ms 14420 KB Output is correct
3 Correct 8 ms 14420 KB Output is correct
4 Correct 7 ms 14420 KB Output is correct
5 Correct 7 ms 14336 KB Output is correct
6 Correct 7 ms 14420 KB Output is correct
7 Correct 8 ms 14340 KB Output is correct
8 Correct 7 ms 14420 KB Output is correct
9 Correct 8 ms 14384 KB Output is correct
10 Correct 7 ms 14420 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14420 KB Output is correct
13 Correct 7 ms 14420 KB Output is correct
14 Correct 9 ms 14432 KB Output is correct
15 Correct 11 ms 14348 KB Output is correct
16 Correct 8 ms 14420 KB Output is correct
17 Correct 7 ms 14420 KB Output is correct
18 Correct 7 ms 14420 KB Output is correct
19 Correct 7 ms 14424 KB Output is correct
20 Correct 8 ms 14420 KB Output is correct
21 Correct 8 ms 14676 KB Output is correct
22 Correct 9 ms 14756 KB Output is correct
23 Correct 8 ms 14676 KB Output is correct
24 Correct 9 ms 14676 KB Output is correct
25 Correct 9 ms 14644 KB Output is correct
26 Correct 11 ms 14704 KB Output is correct
27 Correct 8 ms 14548 KB Output is correct
28 Correct 8 ms 14624 KB Output is correct
29 Correct 8 ms 14676 KB Output is correct
30 Correct 9 ms 14696 KB Output is correct
31 Correct 9 ms 14640 KB Output is correct
32 Correct 8 ms 14676 KB Output is correct
33 Correct 8 ms 14676 KB Output is correct
34 Correct 8 ms 14676 KB Output is correct
35 Correct 9 ms 14660 KB Output is correct
36 Correct 10 ms 14620 KB Output is correct
37 Correct 8 ms 14548 KB Output is correct
38 Correct 9 ms 14676 KB Output is correct
39 Correct 150 ms 37776 KB Output is correct
40 Correct 143 ms 37804 KB Output is correct
41 Correct 138 ms 37580 KB Output is correct
42 Correct 134 ms 37084 KB Output is correct
43 Correct 181 ms 49964 KB Output is correct
44 Correct 125 ms 40012 KB Output is correct
45 Correct 120 ms 38712 KB Output is correct
46 Correct 68 ms 46796 KB Output is correct
47 Correct 204 ms 49712 KB Output is correct
48 Correct 302 ms 91644 KB Output is correct
49 Correct 310 ms 89804 KB Output is correct
50 Correct 203 ms 49636 KB Output is correct
51 Correct 247 ms 49832 KB Output is correct
52 Correct 291 ms 49712 KB Output is correct
53 Correct 292 ms 54580 KB Output is correct
54 Correct 356 ms 86516 KB Output is correct
55 Correct 21 ms 17620 KB Output is correct
56 Correct 18 ms 16340 KB Output is correct
57 Correct 75 ms 35420 KB Output is correct
58 Correct 54 ms 29108 KB Output is correct
59 Correct 97 ms 54476 KB Output is correct
60 Correct 311 ms 93632 KB Output is correct
61 Correct 248 ms 56136 KB Output is correct
62 Correct 202 ms 52676 KB Output is correct
63 Correct 346 ms 52732 KB Output is correct
64 Correct 459 ms 107488 KB Output is correct
65 Correct 465 ms 105676 KB Output is correct
66 Correct 323 ms 89004 KB Output is correct
67 Correct 226 ms 45428 KB Output is correct
68 Correct 371 ms 69000 KB Output is correct
69 Correct 408 ms 73784 KB Output is correct
70 Correct 389 ms 66664 KB Output is correct