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답안 #157149

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
157149 2019-10-09T17:49:48 Z GioChkhaidze 경주 (Race) (IOI11_race) C++14
100 / 100
 959 ms 38776 KB 
#include <bits/stdc++.h>
#include "race.h"
#define F first
#define S second

using namespace std;

const int Nm=200005;
const int Mm=1000006;

int n,k,ANS=1e9,Lvl[Nm],F[Mm],F1[Mm];
pair < int , int > val;
vector < pair < int , int > > v[Nm];

int Dfs (int x,int size,int &Center,int p) {
	int tot=1;
	for (int i=0; i<v[x].size(); i++)
		if (Lvl[v[x][i].F]==-1 && v[x][i].F!=p) tot+=Dfs(v[x][i].F,size,Center,x);
	if (Center==-1 && (2*tot>=size || p==-1)) Center=x;
	return tot;
}

void Df(int x,int p,int type) {
	if (val.F==k) ANS=min(ANS,val.S);
	if (val.F>=k) return ;

	if (type==1) F[val.F]=min(F[val.F],val.S),ANS=min(ANS,F[val.F]+F1[k-val.F]);
		else 
	if (type==2) F1[val.F]=min(F1[val.F],F[val.F]),F[val.F]=1e9;
		else F1[val.F]=1e9;	
		
	for (int i=0; i<v[x].size(); i++) {
		if (Lvl[v[x][i].F]==-1 && v[x][i].F!=p) {
			val.F+=v[x][i].S,val.S++;
			Df(v[x][i].F,x,type);
			val.F-=v[x][i].S,val.S--;
		}
	}
}

void Build(int x,int size,int depth) {
	int Center=-1;
	Dfs(x,size,Center,-1);
	
	Lvl[Center]=depth;
	for (int i=0; i<v[Center].size(); i++)
		if (Lvl[v[Center][i].F]==-1) {
			val.F=v[Center][i].S,val.S=1;
			Df(v[Center][i].F,Center,1);
			Df(v[Center][i].F,Center,2);
			val.F=0,val.S=0;
		}
		
	Df(Center,-1,3);
	
	for (int i=0; i<v[Center].size(); i++)
		if (Lvl[v[Center][i].F]==-1) Build(v[Center][i].F,size/2,depth+1);
}


int best_path(int N, int K, int H[][2], int L[])
{
	n=N,k=K;
	
	for (int i=0; i<n-1; i++) {
		v[H[i][0]].push_back({H[i][1],L[i]});
		v[H[i][1]].push_back({H[i][0],L[i]});
	}
	
	for (int i=0; i<n; i++)
		Lvl[i]=-1;
	
	for (int i=1; i<=k; i++)
		F1[i]=1e9,F[i]=1e9;
	Build(1,n,0);
	
	if (ANS==1e9) ANS=-1;

  	return ANS;
}

Compilation message

race.cpp: In function 'int Dfs(int, int, int&, int)':
race.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[x].size(); i++)
                ~^~~~~~~~~~~~
race.cpp: In function 'void Df(int, int, int)':
race.cpp:32:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[x].size(); i++) {
                ~^~~~~~~~~~~~
race.cpp: In function 'void Build(int, int, int)':
race.cpp:46:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[Center].size(); i++)
                ~^~~~~~~~~~~~~~~~~
race.cpp:56:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0; i<v[Center].size(); i++)
                ~^~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 4984 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 7 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 6 ms 4984 KB Output is correct
14 Correct 7 ms 5112 KB Output is correct
15 Correct 6 ms 5088 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 5116 KB Output is correct
18 Correct 6 ms 5112 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 4984 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 7 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 6 ms 4984 KB Output is correct
14 Correct 7 ms 5112 KB Output is correct
15 Correct 6 ms 5088 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 5116 KB Output is correct
18 Correct 6 ms 5112 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 8 ms 5112 KB Output is correct
22 Correct 14 ms 12280 KB Output is correct
23 Correct 15 ms 11000 KB Output is correct
24 Correct 15 ms 11896 KB Output is correct
25 Correct 13 ms 11640 KB Output is correct
26 Correct 9 ms 7800 KB Output is correct
27 Correct 13 ms 11428 KB Output is correct
28 Correct 9 ms 6600 KB Output is correct
29 Correct 10 ms 7672 KB Output is correct
30 Correct 10 ms 7928 KB Output is correct
31 Correct 14 ms 10236 KB Output is correct
32 Correct 12 ms 10616 KB Output is correct
33 Correct 13 ms 11256 KB Output is correct
34 Correct 11 ms 9764 KB Output is correct
35 Correct 13 ms 11384 KB Output is correct
36 Correct 14 ms 12408 KB Output is correct
37 Correct 13 ms 11256 KB Output is correct
38 Correct 11 ms 9132 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 4984 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 7 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 6 ms 4984 KB Output is correct
14 Correct 7 ms 5112 KB Output is correct
15 Correct 6 ms 5088 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 5116 KB Output is correct
18 Correct 6 ms 5112 KB Output is correct
19 Correct 232 ms 11676 KB Output is correct
20 Correct 225 ms 11640 KB Output is correct
21 Correct 265 ms 11640 KB Output is correct
22 Correct 211 ms 11820 KB Output is correct
23 Correct 118 ms 12044 KB Output is correct
24 Correct 85 ms 11856 KB Output is correct
25 Correct 200 ms 18192 KB Output is correct
26 Correct 148 ms 18956 KB Output is correct
27 Correct 232 ms 18628 KB Output is correct
28 Correct 339 ms 32224 KB Output is correct
29 Correct 312 ms 26908 KB Output is correct
30 Correct 230 ms 18552 KB Output is correct
31 Correct 243 ms 18552 KB Output is correct
32 Correct 295 ms 18820 KB Output is correct
33 Correct 326 ms 17528 KB Output is correct
34 Correct 262 ms 18524 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 4984 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 4984 KB Output is correct
8 Correct 6 ms 4984 KB Output is correct
9 Correct 7 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5112 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 6 ms 4984 KB Output is correct
14 Correct 7 ms 5112 KB Output is correct
15 Correct 6 ms 5088 KB Output is correct
16 Correct 6 ms 4984 KB Output is correct
17 Correct 6 ms 5116 KB Output is correct
18 Correct 6 ms 5112 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 6 ms 4984 KB Output is correct
21 Correct 8 ms 5112 KB Output is correct
22 Correct 14 ms 12280 KB Output is correct
23 Correct 15 ms 11000 KB Output is correct
24 Correct 15 ms 11896 KB Output is correct
25 Correct 13 ms 11640 KB Output is correct
26 Correct 9 ms 7800 KB Output is correct
27 Correct 13 ms 11428 KB Output is correct
28 Correct 9 ms 6600 KB Output is correct
29 Correct 10 ms 7672 KB Output is correct
30 Correct 10 ms 7928 KB Output is correct
31 Correct 14 ms 10236 KB Output is correct
32 Correct 12 ms 10616 KB Output is correct
33 Correct 13 ms 11256 KB Output is correct
34 Correct 11 ms 9764 KB Output is correct
35 Correct 13 ms 11384 KB Output is correct
36 Correct 14 ms 12408 KB Output is correct
37 Correct 13 ms 11256 KB Output is correct
38 Correct 11 ms 9132 KB Output is correct
39 Correct 232 ms 11676 KB Output is correct
40 Correct 225 ms 11640 KB Output is correct
41 Correct 265 ms 11640 KB Output is correct
42 Correct 211 ms 11820 KB Output is correct
43 Correct 118 ms 12044 KB Output is correct
44 Correct 85 ms 11856 KB Output is correct
45 Correct 200 ms 18192 KB Output is correct
46 Correct 148 ms 18956 KB Output is correct
47 Correct 232 ms 18628 KB Output is correct
48 Correct 339 ms 32224 KB Output is correct
49 Correct 312 ms 26908 KB Output is correct
50 Correct 230 ms 18552 KB Output is correct
51 Correct 243 ms 18552 KB Output is correct
52 Correct 295 ms 18820 KB Output is correct
53 Correct 326 ms 17528 KB Output is correct
54 Correct 262 ms 18524 KB Output is correct
55 Correct 20 ms 5752 KB Output is correct
56 Correct 23 ms 5752 KB Output is correct
57 Correct 128 ms 11908 KB Output is correct
58 Correct 50 ms 11616 KB Output is correct
59 Correct 153 ms 20416 KB Output is correct
60 Correct 603 ms 33444 KB Output is correct
61 Correct 283 ms 18856 KB Output is correct
62 Correct 390 ms 26552 KB Output is correct
63 Correct 537 ms 26616 KB Output is correct
64 Correct 959 ms 23160 KB Output is correct
65 Correct 276 ms 19704 KB Output is correct
66 Correct 610 ms 38776 KB Output is correct
67 Correct 160 ms 27324 KB Output is correct
68 Correct 558 ms 27272 KB Output is correct
69 Correct 545 ms 27556 KB Output is correct
70 Correct 532 ms 26744 KB Output is correct