oj.uz

답안 #527735

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
527735 2022-02-18T06:21:59 Z KindaNameless 경주 (Race) (IOI11_race) C++14
100 / 100
 959 ms 39176 KB 
#include<algorithm>
#include<iostream>
#include<cstring>
#include<string>
#include<vector>
#include<bitset>
#include<queue>
#include<stack>
#include<deque>
#include<cmath>
#include<map>
#include<set>
using namespace std;

#define ll long long

struct centroid_tree{
    vector<vector<pair<int, int>>> adj;
    vector<bool> vis;
    vector<int> par, sz;
    vector<ll> cnt;
    map<int, int> paths;
    int N, K, answer;

    void init(int _N, int len){
        int N = _N; K = len;
        adj = vector<vector<pair<int, int>>>(N+2, vector<pair<int, int>>());
        vis = vector<bool>(N+2);
        par = vector<int>(N+2);
        sz  = vector<int>(N+2);
        answer = 1e9;
    }

    void edge(int u, int v, int w){
        adj[u].push_back(make_pair(v, w));
        adj[v].push_back(make_pair(u, w));
    }

    int get_size(int cur, int p = -1){
        sz[cur] = 1;
        for(pair<int, int> ch : adj[cur]){
            if(ch.first != p && !vis[ch.first]){
                sz[cur] += get_size(ch.first, cur);
            }
        }
        return sz[cur];
    }

    int find_centroid(int cur, int p, int total){
        for(pair<int, int> ch : adj[cur]){
            if(sz[ch.first] > total/2 && ch.first != p && !vis[ch.first]){
                return find_centroid(ch.first, cur, total);
            }
        }
        return cur;
    }

    void calc(int cur, int p, int depth, int step, int flag){
        if(depth > K)return;
        if(flag){
            if(!paths.count(depth)){
                paths[depth] = step;
            }
            else{
                paths[depth] = min(paths[depth], step);
            }
        }
        else{
            if(paths.count(K - depth)){
                answer = min(answer, step + paths[K - depth]);
            }
        }
        for(pair<int, int> ch : adj[cur]){
            if(ch.first != p && !vis[ch.first]){
                calc(ch.first, cur, depth + ch.second, step + 1, flag);
            }
        }
    }

    void build(int cur = 1, int p = -1){
        get_size(cur);
        int cen = find_centroid(cur, p, sz[cur]);
        vis[cen] = 1;
        par[cen] = p;

        paths[0] = 0;
        for(pair<int, int> ch : adj[cen]){
            if(!vis[ch.first]){
                calc(ch.first, cen, ch.second, 1, 0);
                calc(ch.first, cen, ch.second, 1, 1);
            }
        }
        paths.clear();

        for(pair<int, int> ch : adj[cen]){
            if(!vis[ch.first]){
                build(ch.first, cen);
            }
        }
    }
};

centroid_tree CT;

int best_path(int N, int K, int H[][2], int L[]){
    CT.init(N, K);
    for(int i = 0; i < N-1; ++i){
        int u = H[i][0] + 1, v = H[i][1] + 1;
        CT.edge(u, v, L[i]);
    }

    CT.build();

    int answer = CT.answer;

    return (answer == 1e9 ? -1 : answer);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 304 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 296 KB Output is correct
17 Correct 1 ms 300 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 304 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 296 KB Output is correct
17 Correct 1 ms 300 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 2 ms 320 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 2 ms 424 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 2 ms 436 KB Output is correct
31 Correct 2 ms 332 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct
34 Correct 2 ms 332 KB Output is correct
35 Correct 1 ms 308 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 2 ms 332 KB Output is correct
38 Correct 2 ms 436 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 304 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 296 KB Output is correct
17 Correct 1 ms 300 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 199 ms 9144 KB Output is correct
20 Correct 173 ms 9060 KB Output is correct
21 Correct 241 ms 9132 KB Output is correct
22 Correct 183 ms 9288 KB Output is correct
23 Correct 85 ms 9412 KB Output is correct
24 Correct 79 ms 9284 KB Output is correct
25 Correct 148 ms 10820 KB Output is correct
26 Correct 100 ms 14900 KB Output is correct
27 Correct 195 ms 17360 KB Output is correct
28 Correct 287 ms 24104 KB Output is correct
29 Correct 288 ms 23540 KB Output is correct
30 Correct 213 ms 17380 KB Output is correct
31 Correct 212 ms 17396 KB Output is correct
32 Correct 238 ms 17404 KB Output is correct
33 Correct 267 ms 16164 KB Output is correct
34 Correct 196 ms 16072 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 300 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 304 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 296 KB Output is correct
17 Correct 1 ms 300 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 2 ms 320 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 2 ms 424 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 2 ms 436 KB Output is correct
31 Correct 2 ms 332 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct
34 Correct 2 ms 332 KB Output is correct
35 Correct 1 ms 308 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 2 ms 332 KB Output is correct
38 Correct 2 ms 436 KB Output is correct
39 Correct 199 ms 9144 KB Output is correct
40 Correct 173 ms 9060 KB Output is correct
41 Correct 241 ms 9132 KB Output is correct
42 Correct 183 ms 9288 KB Output is correct
43 Correct 85 ms 9412 KB Output is correct
44 Correct 79 ms 9284 KB Output is correct
45 Correct 148 ms 10820 KB Output is correct
46 Correct 100 ms 14900 KB Output is correct
47 Correct 195 ms 17360 KB Output is correct
48 Correct 287 ms 24104 KB Output is correct
49 Correct 288 ms 23540 KB Output is correct
50 Correct 213 ms 17380 KB Output is correct
51 Correct 212 ms 17396 KB Output is correct
52 Correct 238 ms 17404 KB Output is correct
53 Correct 267 ms 16164 KB Output is correct
54 Correct 196 ms 16072 KB Output is correct
55 Correct 17 ms 1356 KB Output is correct
56 Correct 14 ms 1236 KB Output is correct
57 Correct 137 ms 9448 KB Output is correct
58 Correct 56 ms 9096 KB Output is correct
59 Correct 316 ms 18400 KB Output is correct
60 Correct 889 ms 39176 KB Output is correct
61 Correct 278 ms 19728 KB Output is correct
62 Correct 296 ms 19616 KB Output is correct
63 Correct 343 ms 19616 KB Output is correct
64 Correct 959 ms 24288 KB Output is correct
65 Correct 220 ms 20388 KB Output is correct
66 Correct 543 ms 24712 KB Output is correct
67 Correct 122 ms 20108 KB Output is correct
68 Correct 410 ms 23728 KB Output is correct
69 Correct 389 ms 23816 KB Output is correct
70 Correct 400 ms 22752 KB Output is correct