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답안 #302451

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
302451 2020-09-18T17:13:14 Z Hemimor 경주 (Race) (IOI11_race) C++14
100 / 100
 992 ms 40440 KB 
#include "race.h"
#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef vector<int> vi;
typedef vector<P> vp;
typedef vector<vp> vvp;

const int inf=1<<30,MAX=1000001,NMAX=200000;
int res=inf,c[MAX],s[NMAX];
ll m;
bool vis[NMAX];
vp g[NMAX];

int Cdfs(int v,int p){
	s[v]=1;
	for(auto i:g[v]){
		int u=i.first;
		if(!vis[u]&&u!=p) s[v]+=Cdfs(u,v);
	}
	return s[v];
}

P Cdfs1(int v,int p,int S){
	P q={inf,0};
	int M=0,S_=S-1;
	for(auto i:g[v]){
		int u=i.first;
		if(!vis[u]&&u!=p){
			q=min(q,Cdfs1(u,v,S));
			M=max(M,s[u]);
			S_-=s[u];
		}
	}
	return min(q,{max(M,S_),v});
}

int Cent(int v){
	Cdfs(v,-1);
	return Cdfs1(v,-1,s[v]).second;
}

int t,len,tp;

void DFS(int v,int par=-1){
	if(len>=res||t>m) return;
	if(t==m) res=min(res,len);
	if(tp==1) c[t]=min(c[t],len);
	else if(tp==2) c[t]=inf;
	else if(t<m) res=min(res,c[m-t]+len);
	for(auto p:g[v]){
		int u=p.first;
		if(!vis[u]&&u!=par){
			len++;
			t+=p.second;
			DFS(u,v);
			len--;
			t-=p.second;
		}
	}
}

void Rec(int v){
	v=Cent(v);
	vis[v]=1;
	for(auto p:g[v]){
		int u=p.first;
		if(!vis[u]){
			t=p.second,len=1,tp=0;
			DFS(u);
			t=p.second,len=1,tp=1;
			DFS(u);
		}
	}
	for(auto p:g[v]){
		int u=p.first;
		if(!vis[u]){
			t=p.second,len=1,tp=2;
			DFS(u);
		}
	}
	for(auto p:g[v]){
		int u=p.first;
		if(!vis[u]) Rec(u);
	}
}

int best_path(int N, int K, int H[][2], int L[]){
	m=K;
	fill(c,c+MAX,inf);
	for(int i=0;i<N-1;i++){
		int u=H[i][0],v=H[i][1];
		g[u].push_back({v,L[i]});
		g[v].push_back({u,L[i]});
	}
	Rec(0);
	if(res==inf) res=-1;
	return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8960 KB Output is correct
2 Correct 6 ms 8960 KB Output is correct
3 Correct 6 ms 8960 KB Output is correct
4 Correct 6 ms 8960 KB Output is correct
5 Correct 6 ms 8960 KB Output is correct
6 Correct 6 ms 8960 KB Output is correct
7 Correct 6 ms 8960 KB Output is correct
8 Correct 6 ms 8960 KB Output is correct
9 Correct 6 ms 8960 KB Output is correct
10 Correct 6 ms 8960 KB Output is correct
11 Correct 6 ms 8960 KB Output is correct
12 Correct 6 ms 8960 KB Output is correct
13 Correct 6 ms 8960 KB Output is correct
14 Correct 6 ms 8960 KB Output is correct
15 Correct 6 ms 8960 KB Output is correct
16 Correct 6 ms 8960 KB Output is correct
17 Correct 6 ms 8960 KB Output is correct
18 Correct 6 ms 8960 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8960 KB Output is correct
2 Correct 6 ms 8960 KB Output is correct
3 Correct 6 ms 8960 KB Output is correct
4 Correct 6 ms 8960 KB Output is correct
5 Correct 6 ms 8960 KB Output is correct
6 Correct 6 ms 8960 KB Output is correct
7 Correct 6 ms 8960 KB Output is correct
8 Correct 6 ms 8960 KB Output is correct
9 Correct 6 ms 8960 KB Output is correct
10 Correct 6 ms 8960 KB Output is correct
11 Correct 6 ms 8960 KB Output is correct
12 Correct 6 ms 8960 KB Output is correct
13 Correct 6 ms 8960 KB Output is correct
14 Correct 6 ms 8960 KB Output is correct
15 Correct 6 ms 8960 KB Output is correct
16 Correct 6 ms 8960 KB Output is correct
17 Correct 6 ms 8960 KB Output is correct
18 Correct 6 ms 8960 KB Output is correct
19 Correct 6 ms 8960 KB Output is correct
20 Correct 6 ms 8960 KB Output is correct
21 Correct 7 ms 8960 KB Output is correct
22 Correct 7 ms 8960 KB Output is correct
23 Correct 7 ms 8960 KB Output is correct
24 Correct 7 ms 8960 KB Output is correct
25 Correct 8 ms 8960 KB Output is correct
26 Correct 7 ms 9088 KB Output is correct
27 Correct 7 ms 9088 KB Output is correct
28 Correct 8 ms 8960 KB Output is correct
29 Correct 7 ms 8960 KB Output is correct
30 Correct 7 ms 8960 KB Output is correct
31 Correct 7 ms 8960 KB Output is correct
32 Correct 7 ms 8960 KB Output is correct
33 Correct 8 ms 8960 KB Output is correct
34 Correct 7 ms 8960 KB Output is correct
35 Correct 7 ms 8960 KB Output is correct
36 Correct 7 ms 9088 KB Output is correct
37 Correct 7 ms 8960 KB Output is correct
38 Correct 7 ms 8960 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8960 KB Output is correct
2 Correct 6 ms 8960 KB Output is correct
3 Correct 6 ms 8960 KB Output is correct
4 Correct 6 ms 8960 KB Output is correct
5 Correct 6 ms 8960 KB Output is correct
6 Correct 6 ms 8960 KB Output is correct
7 Correct 6 ms 8960 KB Output is correct
8 Correct 6 ms 8960 KB Output is correct
9 Correct 6 ms 8960 KB Output is correct
10 Correct 6 ms 8960 KB Output is correct
11 Correct 6 ms 8960 KB Output is correct
12 Correct 6 ms 8960 KB Output is correct
13 Correct 6 ms 8960 KB Output is correct
14 Correct 6 ms 8960 KB Output is correct
15 Correct 6 ms 8960 KB Output is correct
16 Correct 6 ms 8960 KB Output is correct
17 Correct 6 ms 8960 KB Output is correct
18 Correct 6 ms 8960 KB Output is correct
19 Correct 193 ms 14328 KB Output is correct
20 Correct 190 ms 14200 KB Output is correct
21 Correct 200 ms 14456 KB Output is correct
22 Correct 208 ms 14328 KB Output is correct
23 Correct 135 ms 14460 KB Output is correct
24 Correct 92 ms 14584 KB Output is correct
25 Correct 195 ms 19448 KB Output is correct
26 Correct 150 ms 24824 KB Output is correct
27 Correct 243 ms 19832 KB Output is correct
28 Correct 433 ms 40440 KB Output is correct
29 Correct 437 ms 38780 KB Output is correct
30 Correct 239 ms 19832 KB Output is correct
31 Correct 250 ms 19964 KB Output is correct
32 Correct 309 ms 19832 KB Output is correct
33 Correct 377 ms 18808 KB Output is correct
34 Correct 375 ms 18808 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8960 KB Output is correct
2 Correct 6 ms 8960 KB Output is correct
3 Correct 6 ms 8960 KB Output is correct
4 Correct 6 ms 8960 KB Output is correct
5 Correct 6 ms 8960 KB Output is correct
6 Correct 6 ms 8960 KB Output is correct
7 Correct 6 ms 8960 KB Output is correct
8 Correct 6 ms 8960 KB Output is correct
9 Correct 6 ms 8960 KB Output is correct
10 Correct 6 ms 8960 KB Output is correct
11 Correct 6 ms 8960 KB Output is correct
12 Correct 6 ms 8960 KB Output is correct
13 Correct 6 ms 8960 KB Output is correct
14 Correct 6 ms 8960 KB Output is correct
15 Correct 6 ms 8960 KB Output is correct
16 Correct 6 ms 8960 KB Output is correct
17 Correct 6 ms 8960 KB Output is correct
18 Correct 6 ms 8960 KB Output is correct
19 Correct 6 ms 8960 KB Output is correct
20 Correct 6 ms 8960 KB Output is correct
21 Correct 7 ms 8960 KB Output is correct
22 Correct 7 ms 8960 KB Output is correct
23 Correct 7 ms 8960 KB Output is correct
24 Correct 7 ms 8960 KB Output is correct
25 Correct 8 ms 8960 KB Output is correct
26 Correct 7 ms 9088 KB Output is correct
27 Correct 7 ms 9088 KB Output is correct
28 Correct 8 ms 8960 KB Output is correct
29 Correct 7 ms 8960 KB Output is correct
30 Correct 7 ms 8960 KB Output is correct
31 Correct 7 ms 8960 KB Output is correct
32 Correct 7 ms 8960 KB Output is correct
33 Correct 8 ms 8960 KB Output is correct
34 Correct 7 ms 8960 KB Output is correct
35 Correct 7 ms 8960 KB Output is correct
36 Correct 7 ms 9088 KB Output is correct
37 Correct 7 ms 8960 KB Output is correct
38 Correct 7 ms 8960 KB Output is correct
39 Correct 193 ms 14328 KB Output is correct
40 Correct 190 ms 14200 KB Output is correct
41 Correct 200 ms 14456 KB Output is correct
42 Correct 208 ms 14328 KB Output is correct
43 Correct 135 ms 14460 KB Output is correct
44 Correct 92 ms 14584 KB Output is correct
45 Correct 195 ms 19448 KB Output is correct
46 Correct 150 ms 24824 KB Output is correct
47 Correct 243 ms 19832 KB Output is correct
48 Correct 433 ms 40440 KB Output is correct
49 Correct 437 ms 38780 KB Output is correct
50 Correct 239 ms 19832 KB Output is correct
51 Correct 250 ms 19964 KB Output is correct
52 Correct 309 ms 19832 KB Output is correct
53 Correct 377 ms 18808 KB Output is correct
54 Correct 375 ms 18808 KB Output is correct
55 Correct 19 ms 9472 KB Output is correct
56 Correct 19 ms 9472 KB Output is correct
57 Correct 127 ms 14456 KB Output is correct
58 Correct 53 ms 14572 KB Output is correct
59 Correct 150 ms 25208 KB Output is correct
60 Correct 720 ms 40184 KB Output is correct
61 Correct 277 ms 20472 KB Output is correct
62 Correct 299 ms 20344 KB Output is correct
63 Correct 440 ms 20472 KB Output is correct
64 Correct 992 ms 20216 KB Output is correct
65 Correct 442 ms 20344 KB Output is correct
66 Correct 609 ms 35576 KB Output is correct
67 Correct 155 ms 20580 KB Output is correct
68 Correct 305 ms 20472 KB Output is correct
69 Correct 340 ms 20512 KB Output is correct
70 Correct 288 ms 20088 KB Output is correct