oj.uz

답안 #990514

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
990514 2024-05-30T15:18:07 Z mateuszwes 경주 (Race) (IOI11_race) C++17
100 / 100
 245 ms 45292 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ll long long
#define ull unsigned ll

#include "race.h"

using namespace std;

constexpr int debug = 1;
constexpr int M = 2e5+7;
constexpr int D = 1e6+7;

int tree_size[M];
int total_size;
bool was_centroid[M];
ll Kek;
ll mini = 1e9+7;
ll closest[D];
queue<int> changes; 		//komorki z closest do wyzerowania

vector<pair<ll,ll>> adj[M];

inline void addEdge(ll a, ll b, ll val){
	adj[a].pb({b, val});
	adj[b].pb({a, val});
}

void set_size(int s, int p){
	tree_size[s] = 1;
	for(auto k: adj[s]){
		if(k.F == p || was_centroid[k.F]) continue;
		set_size(k.F, s);
		tree_size[s] += tree_size[k.F];
	}
}

int find_centroid(int s, int p){
	for(auto k: adj[s]){
		if(was_centroid[k.F]) continue;
		else if(k.F == p){
			if(total_size-tree_size[s] > total_size/2) return find_centroid(k.F, s);
		}
		else if(tree_size[k.F] > total_size/2){
			return find_centroid(k.F, s);
		}
	}
	return s;
}

void DFS1(int s, int p, ll dist_v, ll dist_e){		//sprawdza, ile ma odpowiadajacy wierzcholek
	if(dist_e == Kek) mini = min(mini, dist_v);
	if((dist_e < Kek) && (closest[Kek-dist_e])) mini = min(mini, closest[Kek-dist_e]+dist_v);

	for(auto k: adj[s]){
		if(was_centroid[k.F] || k.F == p) continue;
		DFS1(k.F, s, dist_v+1, dist_e+k.S);
	}
}

void DFS2(int s, int p, ll dist_v, ll dist_e){	//aktualizacje wierzcholkow w danych odleglosciach
	if(dist_e <= Kek && dist_e != 0){
		if(closest[dist_e] == 0 || closest[dist_e] > dist_v){
			changes.push(dist_e);
			closest[dist_e] = dist_v;
		}
	}
	
	for(auto k: adj[s]){
		if(was_centroid[k.F] || k.F == p) continue;
		DFS2(k.F, s, dist_v+1, dist_e+k.S);
	}
}

void centroid_decomposition(int x){
	set_size(x, x);
	total_size = tree_size[x];
	int cen = find_centroid(x, x);

	//robi cos na centroidzie

	was_centroid[cen] = 1;

	for(auto k: adj[cen]){
		if(!was_centroid[k.F]){
			DFS1(k.F, cen, 1, k.S);
			DFS2(k.F, cen, 1, k.S);
		}
	}

	while(!changes.empty()){
		closest[changes.front()] = 0;
		changes.pop();
	}	

	for(auto k: adj[cen]){
		if(!was_centroid[k.F]) centroid_decomposition(k.F);
	}
	
}

int best_path(int N, int K, int H[][2], int L[]){
  	Kek = K;

  	for(int i = 0; i < N-1; i++){
  		addEdge(H[i][0], H[i][1], L[i]);
  	}

  	centroid_decomposition(0);
  	if(mini == 1e9+7) mini = -1;

  	return mini;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 1 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 1 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 3 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 2 ms 12636 KB Output is correct
16 Correct 2 ms 12636 KB Output is correct
17 Correct 1 ms 12636 KB Output is correct
18 Correct 2 ms 12636 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 1 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 1 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 3 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 2 ms 12636 KB Output is correct
16 Correct 2 ms 12636 KB Output is correct
17 Correct 1 ms 12636 KB Output is correct
18 Correct 2 ms 12636 KB Output is correct
19 Correct 2 ms 12636 KB Output is correct
20 Correct 2 ms 12636 KB Output is correct
21 Correct 2 ms 12752 KB Output is correct
22 Correct 3 ms 14872 KB Output is correct
23 Correct 3 ms 14804 KB Output is correct
24 Correct 3 ms 15452 KB Output is correct
25 Correct 2 ms 13916 KB Output is correct
26 Correct 3 ms 13404 KB Output is correct
27 Correct 2 ms 12636 KB Output is correct
28 Correct 2 ms 12888 KB Output is correct
29 Correct 3 ms 13148 KB Output is correct
30 Correct 3 ms 13404 KB Output is correct
31 Correct 3 ms 14008 KB Output is correct
32 Correct 3 ms 14008 KB Output is correct
33 Correct 4 ms 15448 KB Output is correct
34 Correct 3 ms 14940 KB Output is correct
35 Correct 3 ms 15708 KB Output is correct
36 Correct 3 ms 15452 KB Output is correct
37 Correct 2 ms 14172 KB Output is correct
38 Correct 2 ms 12892 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 1 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 1 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 3 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 2 ms 12636 KB Output is correct
16 Correct 2 ms 12636 KB Output is correct
17 Correct 1 ms 12636 KB Output is correct
18 Correct 2 ms 12636 KB Output is correct
19 Correct 90 ms 20308 KB Output is correct
20 Correct 86 ms 21340 KB Output is correct
21 Correct 82 ms 21076 KB Output is correct
22 Correct 75 ms 21704 KB Output is correct
23 Correct 64 ms 22108 KB Output is correct
24 Correct 40 ms 21084 KB Output is correct
25 Correct 95 ms 25884 KB Output is correct
26 Correct 62 ms 28500 KB Output is correct
27 Correct 106 ms 27984 KB Output is correct
28 Correct 236 ms 42068 KB Output is correct
29 Correct 221 ms 41296 KB Output is correct
30 Correct 104 ms 28428 KB Output is correct
31 Correct 108 ms 28500 KB Output is correct
32 Correct 114 ms 28500 KB Output is correct
33 Correct 154 ms 27216 KB Output is correct
34 Correct 168 ms 27784 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 2 ms 12636 KB Output is correct
6 Correct 1 ms 12636 KB Output is correct
7 Correct 2 ms 12636 KB Output is correct
8 Correct 1 ms 12636 KB Output is correct
9 Correct 2 ms 12636 KB Output is correct
10 Correct 2 ms 12636 KB Output is correct
11 Correct 3 ms 12636 KB Output is correct
12 Correct 2 ms 12636 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 2 ms 12636 KB Output is correct
15 Correct 2 ms 12636 KB Output is correct
16 Correct 2 ms 12636 KB Output is correct
17 Correct 1 ms 12636 KB Output is correct
18 Correct 2 ms 12636 KB Output is correct
19 Correct 2 ms 12636 KB Output is correct
20 Correct 2 ms 12636 KB Output is correct
21 Correct 2 ms 12752 KB Output is correct
22 Correct 3 ms 14872 KB Output is correct
23 Correct 3 ms 14804 KB Output is correct
24 Correct 3 ms 15452 KB Output is correct
25 Correct 2 ms 13916 KB Output is correct
26 Correct 3 ms 13404 KB Output is correct
27 Correct 2 ms 12636 KB Output is correct
28 Correct 2 ms 12888 KB Output is correct
29 Correct 3 ms 13148 KB Output is correct
30 Correct 3 ms 13404 KB Output is correct
31 Correct 3 ms 14008 KB Output is correct
32 Correct 3 ms 14008 KB Output is correct
33 Correct 4 ms 15448 KB Output is correct
34 Correct 3 ms 14940 KB Output is correct
35 Correct 3 ms 15708 KB Output is correct
36 Correct 3 ms 15452 KB Output is correct
37 Correct 2 ms 14172 KB Output is correct
38 Correct 2 ms 12892 KB Output is correct
39 Correct 90 ms 20308 KB Output is correct
40 Correct 86 ms 21340 KB Output is correct
41 Correct 82 ms 21076 KB Output is correct
42 Correct 75 ms 21704 KB Output is correct
43 Correct 64 ms 22108 KB Output is correct
44 Correct 40 ms 21084 KB Output is correct
45 Correct 95 ms 25884 KB Output is correct
46 Correct 62 ms 28500 KB Output is correct
47 Correct 106 ms 27984 KB Output is correct
48 Correct 236 ms 42068 KB Output is correct
49 Correct 221 ms 41296 KB Output is correct
50 Correct 104 ms 28428 KB Output is correct
51 Correct 108 ms 28500 KB Output is correct
52 Correct 114 ms 28500 KB Output is correct
53 Correct 154 ms 27216 KB Output is correct
54 Correct 168 ms 27784 KB Output is correct
55 Correct 8 ms 13148 KB Output is correct
56 Correct 7 ms 13304 KB Output is correct
57 Correct 46 ms 20828 KB Output is correct
58 Correct 24 ms 21000 KB Output is correct
59 Correct 65 ms 29008 KB Output is correct
60 Correct 245 ms 45292 KB Output is correct
61 Correct 109 ms 27732 KB Output is correct
62 Correct 112 ms 28536 KB Output is correct
63 Correct 119 ms 28500 KB Output is correct
64 Correct 217 ms 27488 KB Output is correct
65 Correct 141 ms 29032 KB Output is correct
66 Correct 215 ms 40944 KB Output is correct
67 Correct 62 ms 28348 KB Output is correct
68 Correct 117 ms 29964 KB Output is correct
69 Correct 115 ms 27988 KB Output is correct
70 Correct 107 ms 29576 KB Output is correct