oj.uz

답안 #725920

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
725920 2023-04-18T08:50:51 Z sofija6 경주 (Race) (IOI11_race) C++14
100 / 100
 481 ms 37512 KB 
#include <bits/stdc++.h>
#include "race.h"
#define MAXN 200010
#define MAXK 1000010
using namespace std;
vector<pair<int,int> > G[MAXN];
bool check[MAXN];
int subtree[MAXN],k,res=INT_MAX;
pair<int,int> ans[MAXK];
void DFS_Subtree(int i,int p)
{
    subtree[i]=1;
    for (auto next : G[i])
    {
        if (next.first!=p && !check[next.first])
        {
            DFS_Subtree(next.first,i);
            subtree[i]+=subtree[next.first];
        }
    }
}
int DFS_Centroid(int i,int p,int root)
{
    for (auto next : G[i])
    {
        if (next.first!=p && !check[next.first] && subtree[next.first]>subtree[root]/2)
            return DFS_Centroid(next.first,i,root);
    }
    return i;
}
int c;
void DFS_Paths(int i,int p,int d,int cnt)
{
    if (d>k)
        return;
    if ((ans[k-d].first && ans[k-d].second==c) || k==d)
        res=min(res,ans[k-d].first+cnt);
    for (auto next : G[i])
    {
        if (next.first!=p && !check[next.first])
            DFS_Paths(next.first,i,d+next.second,cnt+1);
    }
}
void DFS_Fill(int i,int p,int d,int cnt)
{
    if (d>k)
        return;
    if (d && (!ans[d].first || ans[d].second!=c || ans[d].first>cnt))
        ans[d]={cnt,c};
    for (auto next : G[i])
    {
        if (next.first!=p && !check[next.first])
            DFS_Fill(next.first,i,d+next.second,cnt+1);
    }
}
void Solve(int i)
{
    DFS_Subtree(i,i);
    c=DFS_Centroid(i,i,i);
    check[c]=true;
    for (auto next : G[c])
    {
        if (check[next.first])
            continue;
        DFS_Paths(next.first,c,next.second,1);
        DFS_Fill(next.first,c,next.second,1);
    }
    for (auto next : G[c])
    {
        if (!check[next.first])
            Solve(next.first);
    }
}
int best_path(int N, int K, int H[][2], int L[])
{
    k=K;
    for (int i=0;i<N-1;i++)
    {
        G[H[i][0]].push_back({H[i][1],L[i]});
        G[H[i][1]].push_back({H[i][0],L[i]});
    }
    Solve(0);
    return (res==INT_MAX?-1 : res);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5008 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 5004 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5004 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5008 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 5004 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5004 KB Output is correct
19 Correct 3 ms 5008 KB Output is correct
20 Correct 3 ms 5000 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 5 ms 8404 KB Output is correct
23 Correct 5 ms 7952 KB Output is correct
24 Correct 6 ms 9112 KB Output is correct
25 Correct 6 ms 8276 KB Output is correct
26 Correct 5 ms 7380 KB Output is correct
27 Correct 3 ms 5012 KB Output is correct
28 Correct 6 ms 6612 KB Output is correct
29 Correct 5 ms 7508 KB Output is correct
30 Correct 5 ms 7764 KB Output is correct
31 Correct 5 ms 8404 KB Output is correct
32 Correct 6 ms 8404 KB Output is correct
33 Correct 7 ms 9812 KB Output is correct
34 Correct 6 ms 9044 KB Output is correct
35 Correct 7 ms 10012 KB Output is correct
36 Correct 7 ms 10324 KB Output is correct
37 Correct 5 ms 8276 KB Output is correct
38 Correct 5 ms 7252 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5008 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 5004 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5004 KB Output is correct
19 Correct 111 ms 10444 KB Output is correct
20 Correct 118 ms 10352 KB Output is correct
21 Correct 125 ms 10396 KB Output is correct
22 Correct 127 ms 10464 KB Output is correct
23 Correct 66 ms 10724 KB Output is correct
24 Correct 54 ms 10500 KB Output is correct
25 Correct 114 ms 14116 KB Output is correct
26 Correct 80 ms 17736 KB Output is correct
27 Correct 155 ms 16064 KB Output is correct
28 Correct 257 ms 30292 KB Output is correct
29 Correct 229 ms 29164 KB Output is correct
30 Correct 157 ms 16108 KB Output is correct
31 Correct 153 ms 16000 KB Output is correct
32 Correct 176 ms 15972 KB Output is correct
33 Correct 169 ms 14836 KB Output is correct
34 Correct 195 ms 14884 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 5008 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 5004 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 5000 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 5004 KB Output is correct
19 Correct 3 ms 5008 KB Output is correct
20 Correct 3 ms 5000 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 5 ms 8404 KB Output is correct
23 Correct 5 ms 7952 KB Output is correct
24 Correct 6 ms 9112 KB Output is correct
25 Correct 6 ms 8276 KB Output is correct
26 Correct 5 ms 7380 KB Output is correct
27 Correct 3 ms 5012 KB Output is correct
28 Correct 6 ms 6612 KB Output is correct
29 Correct 5 ms 7508 KB Output is correct
30 Correct 5 ms 7764 KB Output is correct
31 Correct 5 ms 8404 KB Output is correct
32 Correct 6 ms 8404 KB Output is correct
33 Correct 7 ms 9812 KB Output is correct
34 Correct 6 ms 9044 KB Output is correct
35 Correct 7 ms 10012 KB Output is correct
36 Correct 7 ms 10324 KB Output is correct
37 Correct 5 ms 8276 KB Output is correct
38 Correct 5 ms 7252 KB Output is correct
39 Correct 111 ms 10444 KB Output is correct
40 Correct 118 ms 10352 KB Output is correct
41 Correct 125 ms 10396 KB Output is correct
42 Correct 127 ms 10464 KB Output is correct
43 Correct 66 ms 10724 KB Output is correct
44 Correct 54 ms 10500 KB Output is correct
45 Correct 114 ms 14116 KB Output is correct
46 Correct 80 ms 17736 KB Output is correct
47 Correct 155 ms 16064 KB Output is correct
48 Correct 257 ms 30292 KB Output is correct
49 Correct 229 ms 29164 KB Output is correct
50 Correct 157 ms 16108 KB Output is correct
51 Correct 153 ms 16000 KB Output is correct
52 Correct 176 ms 15972 KB Output is correct
53 Correct 169 ms 14836 KB Output is correct
54 Correct 195 ms 14884 KB Output is correct
55 Correct 11 ms 5648 KB Output is correct
56 Correct 11 ms 5588 KB Output is correct
57 Correct 73 ms 10700 KB Output is correct
58 Correct 33 ms 10816 KB Output is correct
59 Correct 88 ms 19660 KB Output is correct
60 Correct 474 ms 37132 KB Output is correct
61 Correct 181 ms 18892 KB Output is correct
62 Correct 215 ms 18812 KB Output is correct
63 Correct 260 ms 18916 KB Output is correct
64 Correct 481 ms 21288 KB Output is correct
65 Correct 236 ms 19624 KB Output is correct
66 Correct 370 ms 37512 KB Output is correct
67 Correct 108 ms 19488 KB Output is correct
68 Correct 239 ms 24884 KB Output is correct
69 Correct 235 ms 25152 KB Output is correct
70 Correct 220 ms 24268 KB Output is correct