oj.uz

답안 #962441

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
962441 2024-04-13T14:05:44 Z raspy 경주 (Race) (IOI11_race) C++14
100 / 100
 499 ms 51744 KB 
#include "race.h"
#include <unordered_map>
#include <vector>
#include <iostream>
#include <cstring>

using namespace std;
typedef long long ll;

vector<pair<ll, ll>> graf[200005];
ll mp[2000005];
bool rmv[200005];
ll sz[200005];
ll rez = -1;
ll k = 0;

ll sbsz(ll u, ll p)
{
	sz[u] = 1;
	for (auto [v, w] : graf[u])
	{
		if (rmv[v] || v == p)
			continue;
		sz[u] += sbsz(v, u);
	}
	return sz[u];
}

ll gct(ll u, ll vel, ll p)
{
	for (auto [v, w] : graf[u])
	{
		if (rmv[v] || v == p)
			continue;
		if (sz[v]*2 > vel)
			return gct(v, vel, u);
	}
	return u;
}

void dfs(ll u, ll tr, ll gl, ll p, bool polni)
{
	if (tr > k)
		return;
	if (polni)
	{
		if (mp[tr] == -1)
			mp[tr] = gl;
		else
			mp[tr] = min(mp[tr], gl);
	}
	else
	{
		if (mp[k-tr] != -1)
			rez = min((rez == -1 ? gl+mp[k-tr] : rez), gl+mp[k-tr]);
	}
	for (auto [v, w] : graf[u])
	{
		if (rmv[v] || v == p)
			continue;
		dfs(v, tr+w, gl+1, u, polni);
	}
}

void del(int tr, int u, int p = -1)
{
	if(tr > k) return;
	mp[tr] = -1;
	for(auto [v, w]: graf[u])
		if(v != p && !rmv[v])
			del(tr + w, v, u);
}

void decom(ll u)
{
	u = gct(u, sbsz(u, -1), -1);
	rmv[u] = 1;
	mp[0] = 0;
	for (auto [v, w] : graf[u])
	{
		if (rmv[v])
			continue;
		dfs(v, w, 1, u, false);
		dfs(v, w, 1, u, true);
	}
	for(auto [v, w]: graf[u])
		if(!rmv[v])
			del(w, v);
	for (auto [v, w] : graf[u])
		if (!rmv[v])
			decom(v);
	return;
}

int best_path(int N, int K, int H[][2], int L[])
{
	ll n = N;
	k = K;
	for (ll i = 0; i < n-1; i++)
	{
		ll u = H[i][0], v = H[i][1];
		ll w = L[i];
		// cout << "--> " << u << " " << v << " " << w << "\n";
		graf[u].push_back({v, w});
		graf[v].push_back({u, w});
	}
	memset(mp, -1, sizeof(mp));
	decom(0);
	return rez;
}

Compilation message

race.cpp: In function 'll sbsz(ll, ll)':
race.cpp:20:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   20 |  for (auto [v, w] : graf[u])
      |            ^
race.cpp: In function 'll gct(ll, ll, ll)':
race.cpp:31:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   31 |  for (auto [v, w] : graf[u])
      |            ^
race.cpp: In function 'void dfs(ll, ll, ll, ll, bool)':
race.cpp:57:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   57 |  for (auto [v, w] : graf[u])
      |            ^
race.cpp: In function 'void del(int, int, int)':
race.cpp:69:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   69 |  for(auto [v, w]: graf[u])
      |           ^
race.cpp: In function 'void decom(ll)':
race.cpp:79:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   79 |  for (auto [v, w] : graf[u])
      |            ^
race.cpp:86:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   86 |  for(auto [v, w]: graf[u])
      |           ^
race.cpp:89:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   89 |  for (auto [v, w] : graf[u])
      |            ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 25948 KB Output is correct
2 Correct 6 ms 26204 KB Output is correct
3 Correct 5 ms 26176 KB Output is correct
4 Correct 4 ms 26176 KB Output is correct
5 Correct 4 ms 26200 KB Output is correct
6 Correct 5 ms 25948 KB Output is correct
7 Correct 4 ms 26204 KB Output is correct
8 Correct 4 ms 26200 KB Output is correct
9 Correct 5 ms 25948 KB Output is correct
10 Correct 5 ms 25948 KB Output is correct
11 Correct 4 ms 26040 KB Output is correct
12 Correct 4 ms 25948 KB Output is correct
13 Correct 4 ms 25948 KB Output is correct
14 Correct 4 ms 25948 KB Output is correct
15 Correct 4 ms 25948 KB Output is correct
16 Correct 4 ms 26176 KB Output is correct
17 Correct 5 ms 26204 KB Output is correct
18 Correct 5 ms 26204 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 25948 KB Output is correct
2 Correct 6 ms 26204 KB Output is correct
3 Correct 5 ms 26176 KB Output is correct
4 Correct 4 ms 26176 KB Output is correct
5 Correct 4 ms 26200 KB Output is correct
6 Correct 5 ms 25948 KB Output is correct
7 Correct 4 ms 26204 KB Output is correct
8 Correct 4 ms 26200 KB Output is correct
9 Correct 5 ms 25948 KB Output is correct
10 Correct 5 ms 25948 KB Output is correct
11 Correct 4 ms 26040 KB Output is correct
12 Correct 4 ms 25948 KB Output is correct
13 Correct 4 ms 25948 KB Output is correct
14 Correct 4 ms 25948 KB Output is correct
15 Correct 4 ms 25948 KB Output is correct
16 Correct 4 ms 26176 KB Output is correct
17 Correct 5 ms 26204 KB Output is correct
18 Correct 5 ms 26204 KB Output is correct
19 Correct 4 ms 25948 KB Output is correct
20 Correct 4 ms 25948 KB Output is correct
21 Correct 5 ms 26200 KB Output is correct
22 Correct 5 ms 26204 KB Output is correct
23 Correct 5 ms 26156 KB Output is correct
24 Correct 5 ms 26204 KB Output is correct
25 Correct 7 ms 26204 KB Output is correct
26 Correct 6 ms 26204 KB Output is correct
27 Correct 5 ms 26204 KB Output is correct
28 Correct 5 ms 26204 KB Output is correct
29 Correct 6 ms 26200 KB Output is correct
30 Correct 5 ms 26200 KB Output is correct
31 Correct 5 ms 26160 KB Output is correct
32 Correct 5 ms 26204 KB Output is correct
33 Correct 6 ms 26204 KB Output is correct
34 Correct 5 ms 26204 KB Output is correct
35 Correct 5 ms 26204 KB Output is correct
36 Correct 5 ms 26204 KB Output is correct
37 Correct 5 ms 26204 KB Output is correct
38 Correct 5 ms 26260 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 25948 KB Output is correct
2 Correct 6 ms 26204 KB Output is correct
3 Correct 5 ms 26176 KB Output is correct
4 Correct 4 ms 26176 KB Output is correct
5 Correct 4 ms 26200 KB Output is correct
6 Correct 5 ms 25948 KB Output is correct
7 Correct 4 ms 26204 KB Output is correct
8 Correct 4 ms 26200 KB Output is correct
9 Correct 5 ms 25948 KB Output is correct
10 Correct 5 ms 25948 KB Output is correct
11 Correct 4 ms 26040 KB Output is correct
12 Correct 4 ms 25948 KB Output is correct
13 Correct 4 ms 25948 KB Output is correct
14 Correct 4 ms 25948 KB Output is correct
15 Correct 4 ms 25948 KB Output is correct
16 Correct 4 ms 26176 KB Output is correct
17 Correct 5 ms 26204 KB Output is correct
18 Correct 5 ms 26204 KB Output is correct
19 Correct 107 ms 33672 KB Output is correct
20 Correct 110 ms 34404 KB Output is correct
21 Correct 107 ms 34248 KB Output is correct
22 Correct 104 ms 34888 KB Output is correct
23 Correct 62 ms 35568 KB Output is correct
24 Correct 46 ms 34280 KB Output is correct
25 Correct 98 ms 37428 KB Output is correct
26 Correct 78 ms 40044 KB Output is correct
27 Correct 116 ms 40532 KB Output is correct
28 Correct 217 ms 51744 KB Output is correct
29 Correct 180 ms 51280 KB Output is correct
30 Correct 119 ms 41136 KB Output is correct
31 Correct 169 ms 41108 KB Output is correct
32 Correct 144 ms 41132 KB Output is correct
33 Correct 173 ms 40132 KB Output is correct
34 Correct 123 ms 40508 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 25948 KB Output is correct
2 Correct 6 ms 26204 KB Output is correct
3 Correct 5 ms 26176 KB Output is correct
4 Correct 4 ms 26176 KB Output is correct
5 Correct 4 ms 26200 KB Output is correct
6 Correct 5 ms 25948 KB Output is correct
7 Correct 4 ms 26204 KB Output is correct
8 Correct 4 ms 26200 KB Output is correct
9 Correct 5 ms 25948 KB Output is correct
10 Correct 5 ms 25948 KB Output is correct
11 Correct 4 ms 26040 KB Output is correct
12 Correct 4 ms 25948 KB Output is correct
13 Correct 4 ms 25948 KB Output is correct
14 Correct 4 ms 25948 KB Output is correct
15 Correct 4 ms 25948 KB Output is correct
16 Correct 4 ms 26176 KB Output is correct
17 Correct 5 ms 26204 KB Output is correct
18 Correct 5 ms 26204 KB Output is correct
19 Correct 4 ms 25948 KB Output is correct
20 Correct 4 ms 25948 KB Output is correct
21 Correct 5 ms 26200 KB Output is correct
22 Correct 5 ms 26204 KB Output is correct
23 Correct 5 ms 26156 KB Output is correct
24 Correct 5 ms 26204 KB Output is correct
25 Correct 7 ms 26204 KB Output is correct
26 Correct 6 ms 26204 KB Output is correct
27 Correct 5 ms 26204 KB Output is correct
28 Correct 5 ms 26204 KB Output is correct
29 Correct 6 ms 26200 KB Output is correct
30 Correct 5 ms 26200 KB Output is correct
31 Correct 5 ms 26160 KB Output is correct
32 Correct 5 ms 26204 KB Output is correct
33 Correct 6 ms 26204 KB Output is correct
34 Correct 5 ms 26204 KB Output is correct
35 Correct 5 ms 26204 KB Output is correct
36 Correct 5 ms 26204 KB Output is correct
37 Correct 5 ms 26204 KB Output is correct
38 Correct 5 ms 26260 KB Output is correct
39 Correct 107 ms 33672 KB Output is correct
40 Correct 110 ms 34404 KB Output is correct
41 Correct 107 ms 34248 KB Output is correct
42 Correct 104 ms 34888 KB Output is correct
43 Correct 62 ms 35568 KB Output is correct
44 Correct 46 ms 34280 KB Output is correct
45 Correct 98 ms 37428 KB Output is correct
46 Correct 78 ms 40044 KB Output is correct
47 Correct 116 ms 40532 KB Output is correct
48 Correct 217 ms 51744 KB Output is correct
49 Correct 180 ms 51280 KB Output is correct
50 Correct 119 ms 41136 KB Output is correct
51 Correct 169 ms 41108 KB Output is correct
52 Correct 144 ms 41132 KB Output is correct
53 Correct 173 ms 40132 KB Output is correct
54 Correct 123 ms 40508 KB Output is correct
55 Correct 12 ms 26716 KB Output is correct
56 Correct 12 ms 26716 KB Output is correct
57 Correct 63 ms 33960 KB Output is correct
58 Correct 39 ms 34104 KB Output is correct
59 Correct 81 ms 40020 KB Output is correct
60 Correct 362 ms 51556 KB Output is correct
61 Correct 126 ms 40616 KB Output is correct
62 Correct 170 ms 41300 KB Output is correct
63 Correct 241 ms 41044 KB Output is correct
64 Correct 499 ms 39580 KB Output is correct
65 Correct 176 ms 41852 KB Output is correct
66 Correct 331 ms 47376 KB Output is correct
67 Correct 89 ms 41772 KB Output is correct
68 Correct 220 ms 40836 KB Output is correct
69 Correct 185 ms 38624 KB Output is correct
70 Correct 228 ms 40916 KB Output is correct