oj.uz

답안 #488059

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
488059 2021-11-17T14:19:17 Z macktvz 경주 (Race) (IOI11_race) C++17
100 / 100
 557 ms 35800 KB 
#include <bits/stdc++.h>

using namespace std;
const int Ni = 200001;
const int Ki = 1e6+1;
vector<pair<int,int>> adj[Ni];
vector<int> cnt;
bool cen[Ni];
int sz[Ni];
int mini = Ni;
int k;

void dsz(int u, int p) {
    sz[u] = 1;
    for(pair<int,int> i : adj[u]) {
        if (i.first != p && !cen[i.first]) {
            dsz(i.first,u);
            sz[u] += sz[i.first];
        }
    }
}
int centroid(int u,int p,int n) {
    for(pair<int,int> i : adj[u]) {
        if (i.first != p && 2*sz[i.first] > n && !cen[i.first]) return centroid(i.first,u,n);
    }
    return u;
}
void find(int u, int p, int currl, int ps, bool add) {
    if (ps > k) return;
    if (add) cnt[ps] = cnt[ps]==-1 ? currl : min(cnt[ps],currl);
    else if (cnt[k-ps] != -1) mini = min(mini,currl+cnt[k-ps]);
    for(pair<int,int> i : adj[u]) {
        if (i.first != p && !cen[i.first]) {
            find(i.first,u,currl+1,ps+i.second,add);
        }
    }
} 
void del(int u, int p, int ps) {
    if (ps > k) return;
    cnt[ps] = -1;
    for(pair<int,int> i : adj[u]){
        if (i.first != p && !cen[i.first]) del(i.first,u,ps+i.second);
    }
}
void solve(int u, int centr) {
    dsz(u,centr);
    int cent = centroid(u,centr,sz[u]);
    cen[cent]=true;
    
    for(pair<int,int> i : adj[cent]) {
        if (!cen[i.first]) {
            find(i.first,cent,1,i.second,0);
            find(i.first,cent,1,i.second,1);
        }
    }
    for(pair<int,int> i : adj[cent]) {
        if (!cen[i.first]) {
            del(i.first,cent,i.second);
        }
    }
    for(pair<int,int> i : adj[cent]) {
        if (!cen[i.first]) solve(i.first,cent);
    }
}
int best_path(int N,int K,int H[][2],int L[]) {
    for(int i = 0; i < N-1; i++) {
        adj[H[i][0]].push_back({H[i][1],L[i]});
        adj[H[i][1]].push_back({H[i][0],L[i]});
    }
    k=K;
    cnt.resize(K+1);
    fill(begin(cnt),end(cnt),-1);
    cnt[0] = 0;
    solve(0,-1);
    return mini == Ni ? -1 : mini;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 2 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 2 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 3 ms 5068 KB Output is correct
22 Correct 5 ms 8652 KB Output is correct
23 Correct 4 ms 8012 KB Output is correct
24 Correct 5 ms 8396 KB Output is correct
25 Correct 5 ms 8268 KB Output is correct
26 Correct 3 ms 6348 KB Output is correct
27 Correct 5 ms 8140 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 4 ms 6476 KB Output is correct
31 Correct 5 ms 7628 KB Output is correct
32 Correct 4 ms 7756 KB Output is correct
33 Correct 5 ms 8012 KB Output is correct
34 Correct 4 ms 7372 KB Output is correct
35 Correct 4 ms 8140 KB Output is correct
36 Correct 6 ms 8672 KB Output is correct
37 Correct 4 ms 8140 KB Output is correct
38 Correct 4 ms 6988 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 2 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 122 ms 10280 KB Output is correct
20 Correct 120 ms 10440 KB Output is correct
21 Correct 134 ms 10252 KB Output is correct
22 Correct 146 ms 10340 KB Output is correct
23 Correct 69 ms 10568 KB Output is correct
24 Correct 49 ms 10372 KB Output is correct
25 Correct 123 ms 13904 KB Output is correct
26 Correct 90 ms 17552 KB Output is correct
27 Correct 160 ms 15764 KB Output is correct
28 Correct 246 ms 30148 KB Output is correct
29 Correct 238 ms 29080 KB Output is correct
30 Correct 167 ms 18392 KB Output is correct
31 Correct 152 ms 18208 KB Output is correct
32 Correct 191 ms 18244 KB Output is correct
33 Correct 216 ms 17172 KB Output is correct
34 Correct 157 ms 17096 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 ms 4940 KB Output is correct
4 Correct 2 ms 4940 KB Output is correct
5 Correct 2 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 2 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 2 ms 4940 KB Output is correct
11 Correct 2 ms 4940 KB Output is correct
12 Correct 2 ms 4940 KB Output is correct
13 Correct 2 ms 4940 KB Output is correct
14 Correct 2 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 2 ms 4940 KB Output is correct
17 Correct 2 ms 4940 KB Output is correct
18 Correct 2 ms 4940 KB Output is correct
19 Correct 2 ms 4940 KB Output is correct
20 Correct 2 ms 4940 KB Output is correct
21 Correct 3 ms 5068 KB Output is correct
22 Correct 5 ms 8652 KB Output is correct
23 Correct 4 ms 8012 KB Output is correct
24 Correct 5 ms 8396 KB Output is correct
25 Correct 5 ms 8268 KB Output is correct
26 Correct 3 ms 6348 KB Output is correct
27 Correct 5 ms 8140 KB Output is correct
28 Correct 4 ms 5836 KB Output is correct
29 Correct 4 ms 6348 KB Output is correct
30 Correct 4 ms 6476 KB Output is correct
31 Correct 5 ms 7628 KB Output is correct
32 Correct 4 ms 7756 KB Output is correct
33 Correct 5 ms 8012 KB Output is correct
34 Correct 4 ms 7372 KB Output is correct
35 Correct 4 ms 8140 KB Output is correct
36 Correct 6 ms 8672 KB Output is correct
37 Correct 4 ms 8140 KB Output is correct
38 Correct 4 ms 6988 KB Output is correct
39 Correct 122 ms 10280 KB Output is correct
40 Correct 120 ms 10440 KB Output is correct
41 Correct 134 ms 10252 KB Output is correct
42 Correct 146 ms 10340 KB Output is correct
43 Correct 69 ms 10568 KB Output is correct
44 Correct 49 ms 10372 KB Output is correct
45 Correct 123 ms 13904 KB Output is correct
46 Correct 90 ms 17552 KB Output is correct
47 Correct 160 ms 15764 KB Output is correct
48 Correct 246 ms 30148 KB Output is correct
49 Correct 238 ms 29080 KB Output is correct
50 Correct 167 ms 18392 KB Output is correct
51 Correct 152 ms 18208 KB Output is correct
52 Correct 191 ms 18244 KB Output is correct
53 Correct 216 ms 17172 KB Output is correct
54 Correct 157 ms 17096 KB Output is correct
55 Correct 11 ms 5612 KB Output is correct
56 Correct 12 ms 5580 KB Output is correct
57 Correct 79 ms 11908 KB Output is correct
58 Correct 32 ms 11608 KB Output is correct
59 Correct 92 ms 19636 KB Output is correct
60 Correct 456 ms 35800 KB Output is correct
61 Correct 199 ms 18316 KB Output is correct
62 Correct 194 ms 22352 KB Output is correct
63 Correct 266 ms 22144 KB Output is correct
64 Correct 557 ms 20076 KB Output is correct
65 Correct 211 ms 18148 KB Output is correct
66 Correct 346 ms 32776 KB Output is correct
67 Correct 113 ms 22392 KB Output is correct
68 Correct 276 ms 22300 KB Output is correct
69 Correct 250 ms 22464 KB Output is correct
70 Correct 250 ms 22024 KB Output is correct