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답안 #199516

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
199516 2020-02-01T17:40:44 Z shahriarkhan 경주 (Race) (IOI11_race) C++14
100 / 100
 947 ms 34040 KB 
#include<bits/stdc++.h>
using namespace std ;

const int mx = 2e5 + 5 , ww = 1e7 + 6 ;

vector<pair<int,int> > adj[mx] ;

int subtree[mx] , vis[mx] , dist[ww] , n , ans = mx , k ;

void dfs(int s , int par)
{
    int siz = adj[s].size() ;
    subtree[s] = 1 ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(adj[s][i].first!=par && vis[adj[s][i].first]==0)
        {
            dfs(adj[s][i].first,s) ;
            subtree[s] += subtree[adj[s][i].first] ;
        }
    }
}


int centroid(int s , int par , int n)
{
    int siz = adj[s].size() ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(adj[s][i].first!=par && vis[adj[s][i].first]==0)
        {
            if((subtree[adj[s][i].first])>n) return centroid(adj[s][i].first,s,n) ;
        }
    }
    return s ;
}

void findans(int s , int p , int num , int sum)
{
    if(sum<=k) ans = min(ans,num + dist[k-sum]) ;
    int siz = adj[s].size() ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(vis[adj[s][i].first]==0 && adj[s][i].first!=p)
        {
            findans(adj[s][i].first,s,num+1,sum+adj[s][i].second) ;
        }
    }
}

void addcnt(int s , int p , int num , int sum)
{
    if(sum<=k) dist[sum] = min(dist[sum],num) ;
    int siz = adj[s].size() ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(vis[adj[s][i].first]==0 && adj[s][i].first!=p) addcnt(adj[s][i].first,s,num+1,sum+adj[s][i].second) ;
    }
}

void eras(int s , int p , int sum)
{
    if(sum<=k) dist[sum] = mx ;
    int siz = adj[s].size() ;
    for(int i = 0 ; i < siz ; ++i)
    {
        if(adj[s][i].first != p && vis[adj[s][i].first]==0)
        {
            eras(adj[s][i].first,s,sum+adj[s][i].second) ;
        }
    }
}

void decomp(int s , int par)
{
    dfs(s,par) ;
    int c = centroid(s,par,subtree[s]/2) ;
    vis[c] = 1 ;
    int siz = adj[c].size() ;
    dist[0] = 0 ;
    for(int i = 0 ; i < siz ; ++i)
    {
        int v = adj[c][i].first ;
        if(!vis[v])
        {
            findans(v,c,1,adj[c][i].second) ;
            addcnt(v,c,1,adj[c][i].second) ;
        }
    }
    for(int i = 0 ; i < siz ; ++i)
    {
        int v = adj[c][i].first ;
        if(!vis[v])
        {
            eras(v,c,adj[c][i].second) ;
        }
    }
    for(int i = 0 ; i < siz ; ++i)
    {
        if(!vis[adj[c][i].first]) decomp(adj[c][i].first,c) ;
    }
}

int best_path(int a , int b , int H[][2] , int L[])
{
    n = a , k = b ;
    for(int i = 0 ; i < n - 1 ; ++i)
    {
        int ww = H[i][0] , vv = H[i][1] ;
        adj[ww].push_back({vv,L[i]}) ;
        adj[vv].push_back({ww,L[i]}) ;
    }
    for(int i = 0 ; i <= k ; ++i) dist[i] = mx ;
    decomp(0,-1) ;
    if(ans==mx) return -1 ;
    else return ans ;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 8 ms 5112 KB Output is correct
3 Correct 8 ms 4984 KB Output is correct
4 Correct 8 ms 4984 KB Output is correct
5 Correct 8 ms 4984 KB Output is correct
6 Correct 8 ms 5112 KB Output is correct
7 Correct 9 ms 4984 KB Output is correct
8 Correct 9 ms 4984 KB Output is correct
9 Correct 10 ms 5100 KB Output is correct
10 Correct 9 ms 5112 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 9 ms 5112 KB Output is correct
14 Correct 9 ms 5112 KB Output is correct
15 Correct 9 ms 4984 KB Output is correct
16 Correct 9 ms 5112 KB Output is correct
17 Correct 9 ms 5112 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 8 ms 5112 KB Output is correct
3 Correct 8 ms 4984 KB Output is correct
4 Correct 8 ms 4984 KB Output is correct
5 Correct 8 ms 4984 KB Output is correct
6 Correct 8 ms 5112 KB Output is correct
7 Correct 9 ms 4984 KB Output is correct
8 Correct 9 ms 4984 KB Output is correct
9 Correct 10 ms 5100 KB Output is correct
10 Correct 9 ms 5112 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 9 ms 5112 KB Output is correct
14 Correct 9 ms 5112 KB Output is correct
15 Correct 9 ms 4984 KB Output is correct
16 Correct 9 ms 5112 KB Output is correct
17 Correct 9 ms 5112 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 9 ms 4984 KB Output is correct
20 Correct 8 ms 4984 KB Output is correct
21 Correct 9 ms 5112 KB Output is correct
22 Correct 11 ms 8696 KB Output is correct
23 Correct 11 ms 8060 KB Output is correct
24 Correct 11 ms 8440 KB Output is correct
25 Correct 12 ms 8440 KB Output is correct
26 Correct 10 ms 6392 KB Output is correct
27 Correct 10 ms 8184 KB Output is correct
28 Correct 10 ms 5884 KB Output is correct
29 Correct 10 ms 6392 KB Output is correct
30 Correct 11 ms 6520 KB Output is correct
31 Correct 12 ms 7672 KB Output is correct
32 Correct 10 ms 7824 KB Output is correct
33 Correct 11 ms 8184 KB Output is correct
34 Correct 11 ms 7416 KB Output is correct
35 Correct 12 ms 8312 KB Output is correct
36 Correct 11 ms 8696 KB Output is correct
37 Correct 12 ms 8184 KB Output is correct
38 Correct 11 ms 7160 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 8 ms 5112 KB Output is correct
3 Correct 8 ms 4984 KB Output is correct
4 Correct 8 ms 4984 KB Output is correct
5 Correct 8 ms 4984 KB Output is correct
6 Correct 8 ms 5112 KB Output is correct
7 Correct 9 ms 4984 KB Output is correct
8 Correct 9 ms 4984 KB Output is correct
9 Correct 10 ms 5100 KB Output is correct
10 Correct 9 ms 5112 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 9 ms 5112 KB Output is correct
14 Correct 9 ms 5112 KB Output is correct
15 Correct 9 ms 4984 KB Output is correct
16 Correct 9 ms 5112 KB Output is correct
17 Correct 9 ms 5112 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 345 ms 10616 KB Output is correct
20 Correct 286 ms 10744 KB Output is correct
21 Correct 228 ms 10616 KB Output is correct
22 Correct 191 ms 10744 KB Output is correct
23 Correct 196 ms 10964 KB Output is correct
24 Correct 114 ms 10744 KB Output is correct
25 Correct 240 ms 14072 KB Output is correct
26 Correct 121 ms 16376 KB Output is correct
27 Correct 326 ms 16504 KB Output is correct
28 Correct 746 ms 27768 KB Output is correct
29 Correct 775 ms 30072 KB Output is correct
30 Correct 298 ms 19456 KB Output is correct
31 Correct 318 ms 19448 KB Output is correct
32 Correct 408 ms 19560 KB Output is correct
33 Correct 458 ms 18428 KB Output is correct
34 Correct 560 ms 19320 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 4984 KB Output is correct
2 Correct 8 ms 5112 KB Output is correct
3 Correct 8 ms 4984 KB Output is correct
4 Correct 8 ms 4984 KB Output is correct
5 Correct 8 ms 4984 KB Output is correct
6 Correct 8 ms 5112 KB Output is correct
7 Correct 9 ms 4984 KB Output is correct
8 Correct 9 ms 4984 KB Output is correct
9 Correct 10 ms 5100 KB Output is correct
10 Correct 9 ms 5112 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 9 ms 5112 KB Output is correct
14 Correct 9 ms 5112 KB Output is correct
15 Correct 9 ms 4984 KB Output is correct
16 Correct 9 ms 5112 KB Output is correct
17 Correct 9 ms 5112 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 9 ms 4984 KB Output is correct
20 Correct 8 ms 4984 KB Output is correct
21 Correct 9 ms 5112 KB Output is correct
22 Correct 11 ms 8696 KB Output is correct
23 Correct 11 ms 8060 KB Output is correct
24 Correct 11 ms 8440 KB Output is correct
25 Correct 12 ms 8440 KB Output is correct
26 Correct 10 ms 6392 KB Output is correct
27 Correct 10 ms 8184 KB Output is correct
28 Correct 10 ms 5884 KB Output is correct
29 Correct 10 ms 6392 KB Output is correct
30 Correct 11 ms 6520 KB Output is correct
31 Correct 12 ms 7672 KB Output is correct
32 Correct 10 ms 7824 KB Output is correct
33 Correct 11 ms 8184 KB Output is correct
34 Correct 11 ms 7416 KB Output is correct
35 Correct 12 ms 8312 KB Output is correct
36 Correct 11 ms 8696 KB Output is correct
37 Correct 12 ms 8184 KB Output is correct
38 Correct 11 ms 7160 KB Output is correct
39 Correct 345 ms 10616 KB Output is correct
40 Correct 286 ms 10744 KB Output is correct
41 Correct 228 ms 10616 KB Output is correct
42 Correct 191 ms 10744 KB Output is correct
43 Correct 196 ms 10964 KB Output is correct
44 Correct 114 ms 10744 KB Output is correct
45 Correct 240 ms 14072 KB Output is correct
46 Correct 121 ms 16376 KB Output is correct
47 Correct 326 ms 16504 KB Output is correct
48 Correct 746 ms 27768 KB Output is correct
49 Correct 775 ms 30072 KB Output is correct
50 Correct 298 ms 19456 KB Output is correct
51 Correct 318 ms 19448 KB Output is correct
52 Correct 408 ms 19560 KB Output is correct
53 Correct 458 ms 18428 KB Output is correct
54 Correct 560 ms 19320 KB Output is correct
55 Correct 19 ms 5752 KB Output is correct
56 Correct 20 ms 5752 KB Output is correct
57 Correct 107 ms 12280 KB Output is correct
58 Correct 48 ms 12008 KB Output is correct
59 Correct 133 ms 18428 KB Output is correct
60 Correct 790 ms 34040 KB Output is correct
61 Correct 328 ms 19576 KB Output is correct
62 Correct 331 ms 23416 KB Output is correct
63 Correct 402 ms 23416 KB Output is correct
64 Correct 947 ms 21880 KB Output is correct
65 Correct 669 ms 20600 KB Output is correct
66 Correct 883 ms 32056 KB Output is correct
67 Correct 175 ms 24164 KB Output is correct
68 Correct 462 ms 24184 KB Output is correct
69 Correct 465 ms 24312 KB Output is correct
70 Correct 452 ms 23544 KB Output is correct