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답안 #819872

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
819872 2023-08-10T14:48:09 Z hungby04 경주 (Race) (IOI11_race) C++17
100 / 100
 359 ms 49200 KB 
/// HuDzG
#include <bits/stdc++.h>
#define reset(a) memset(a,0,sizeof(a))
#define ll long long
#define ld long double
#define endl '\n'
#define AutoAC int main()
#define OO 1000000007
#define F first
#define S second
#define pii pair <int, int>
#define pll pair <ll, ll>
#define pb push_back
#define mp make_pair
#define nmax 1000005
#define HUNGIT ""
#define MOD 1000000007

using namespace std;

int n, k;
vector <pii> adj[nmax];
int res = OO;
int cntChild[nmax], Min[nmax];
bool isCentroid[nmax];

int getCntChild(int u, int p)
{
    cntChild[u] = 1;
    for(pii v : adj[u])
        if(v.F != p && !isCentroid[v.F]) cntChild[u] += getCntChild(v.F, u);
    return cntChild[u];
}

int findCentroid(int u, int p, int Size)
{
    for(pii v : adj[u])
        if(v.F != p && !isCentroid[v.F] && cntChild[v.F] > Size) return findCentroid(v.F, u, Size);
    return u;
}

void dfs(int u, int p, bool isFill, int length, int depth)
{
    if(length > k) return;
    if(isFill) Min[length] = min(Min[length], depth);
    else res = min(res, depth + Min[k - length]);
    for(pii v : adj[u])
    {
        if(v.F != p && !isCentroid[v.F]) 
        {
            dfs(v.F, u, isFill, length + v.S, depth + 1);
        }
    }
}

void dfsReset(int u, int p, int length)
{
    if(length > k) return;
    Min[length] = OO;
    for(pii v : adj[u])
        if(v.F != p && !isCentroid[v.F]) dfsReset(v.F, u, length + v.S);
}

void decompose(int u)
{
    int centroid = findCentroid(u, 0, getCntChild(u, 0) >> 1);
    isCentroid[centroid] = 1;
    Min[0] = 0;
    for(pii v : adj[centroid])
        if(!isCentroid[v.F])
        {
            dfs(v.F, centroid, 0, v.S, 1);
            dfs(v.F, centroid, 1, v.S, 1);
        }
    dfsReset(centroid, 0, 0);
    for(pii v : adj[centroid])
        if(!isCentroid[v.F]) decompose(v.F);
}

int best_path(int N, int K, int H[][2], int L[])
{
    n = N; k = K;
    for(int i = 0; i < n - 1; i++)
    {
        int u = H[i][0], v = H[i][1], w = L[i];
        u++; v++;
        adj[u].pb(mp(v, w));
        adj[v].pb(mp(u, w));
    }
    fill(Min + 1, Min + 1 + k, OO);
    decompose(1);
    return (res == OO ? -1 : res);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23760 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23744 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 12 ms 23728 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 11 ms 23812 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23792 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23804 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23760 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23744 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 12 ms 23728 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 11 ms 23812 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23792 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23804 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23720 KB Output is correct
21 Correct 12 ms 23852 KB Output is correct
22 Correct 13 ms 27472 KB Output is correct
23 Correct 13 ms 26708 KB Output is correct
24 Correct 14 ms 27240 KB Output is correct
25 Correct 17 ms 27268 KB Output is correct
26 Correct 14 ms 25172 KB Output is correct
27 Correct 14 ms 26960 KB Output is correct
28 Correct 13 ms 24532 KB Output is correct
29 Correct 13 ms 25044 KB Output is correct
30 Correct 16 ms 25308 KB Output is correct
31 Correct 14 ms 26404 KB Output is correct
32 Correct 14 ms 26544 KB Output is correct
33 Correct 14 ms 26924 KB Output is correct
34 Correct 13 ms 26172 KB Output is correct
35 Correct 14 ms 26968 KB Output is correct
36 Correct 14 ms 27436 KB Output is correct
37 Correct 14 ms 26964 KB Output is correct
38 Correct 14 ms 25856 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23760 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23744 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 12 ms 23728 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 11 ms 23812 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23792 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23804 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 123 ms 29012 KB Output is correct
20 Correct 104 ms 29124 KB Output is correct
21 Correct 109 ms 29144 KB Output is correct
22 Correct 113 ms 29104 KB Output is correct
23 Correct 64 ms 29352 KB Output is correct
24 Correct 52 ms 29256 KB Output is correct
25 Correct 104 ms 31892 KB Output is correct
26 Correct 89 ms 34800 KB Output is correct
27 Correct 134 ms 34624 KB Output is correct
28 Correct 192 ms 45812 KB Output is correct
29 Correct 211 ms 44928 KB Output is correct
30 Correct 127 ms 34640 KB Output is correct
31 Correct 126 ms 34596 KB Output is correct
32 Correct 140 ms 34608 KB Output is correct
33 Correct 211 ms 33700 KB Output is correct
34 Correct 133 ms 33484 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 13 ms 23760 KB Output is correct
3 Correct 13 ms 23764 KB Output is correct
4 Correct 12 ms 23744 KB Output is correct
5 Correct 13 ms 23728 KB Output is correct
6 Correct 12 ms 23728 KB Output is correct
7 Correct 12 ms 23764 KB Output is correct
8 Correct 11 ms 23812 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 12 ms 23792 KB Output is correct
12 Correct 13 ms 23736 KB Output is correct
13 Correct 11 ms 23764 KB Output is correct
14 Correct 11 ms 23764 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23804 KB Output is correct
18 Correct 11 ms 23764 KB Output is correct
19 Correct 11 ms 23764 KB Output is correct
20 Correct 11 ms 23720 KB Output is correct
21 Correct 12 ms 23852 KB Output is correct
22 Correct 13 ms 27472 KB Output is correct
23 Correct 13 ms 26708 KB Output is correct
24 Correct 14 ms 27240 KB Output is correct
25 Correct 17 ms 27268 KB Output is correct
26 Correct 14 ms 25172 KB Output is correct
27 Correct 14 ms 26960 KB Output is correct
28 Correct 13 ms 24532 KB Output is correct
29 Correct 13 ms 25044 KB Output is correct
30 Correct 16 ms 25308 KB Output is correct
31 Correct 14 ms 26404 KB Output is correct
32 Correct 14 ms 26544 KB Output is correct
33 Correct 14 ms 26924 KB Output is correct
34 Correct 13 ms 26172 KB Output is correct
35 Correct 14 ms 26968 KB Output is correct
36 Correct 14 ms 27436 KB Output is correct
37 Correct 14 ms 26964 KB Output is correct
38 Correct 14 ms 25856 KB Output is correct
39 Correct 123 ms 29012 KB Output is correct
40 Correct 104 ms 29124 KB Output is correct
41 Correct 109 ms 29144 KB Output is correct
42 Correct 113 ms 29104 KB Output is correct
43 Correct 64 ms 29352 KB Output is correct
44 Correct 52 ms 29256 KB Output is correct
45 Correct 104 ms 31892 KB Output is correct
46 Correct 89 ms 34800 KB Output is correct
47 Correct 134 ms 34624 KB Output is correct
48 Correct 192 ms 45812 KB Output is correct
49 Correct 211 ms 44928 KB Output is correct
50 Correct 127 ms 34640 KB Output is correct
51 Correct 126 ms 34596 KB Output is correct
52 Correct 140 ms 34608 KB Output is correct
53 Correct 211 ms 33700 KB Output is correct
54 Correct 133 ms 33484 KB Output is correct
55 Correct 22 ms 24380 KB Output is correct
56 Correct 19 ms 24276 KB Output is correct
57 Correct 69 ms 29388 KB Output is correct
58 Correct 38 ms 29356 KB Output is correct
59 Correct 97 ms 35640 KB Output is correct
60 Correct 359 ms 49200 KB Output is correct
61 Correct 137 ms 34600 KB Output is correct
62 Correct 170 ms 38552 KB Output is correct
63 Correct 274 ms 38584 KB Output is correct
64 Correct 353 ms 36428 KB Output is correct
65 Correct 142 ms 34612 KB Output is correct
66 Correct 323 ms 46752 KB Output is correct
67 Correct 87 ms 38780 KB Output is correct
68 Correct 197 ms 38812 KB Output is correct
69 Correct 192 ms 38728 KB Output is correct
70 Correct 207 ms 38240 KB Output is correct