oj.uz

답안 #851119

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
851119 2023-09-18T14:26:58 Z andrei_marciuc 경주 (Race) (IOI11_race) C++14
100 / 100
 1688 ms 51016 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
using namespace std;
 
const int inf = 1e9+9999;
vector<vector<pair<int, int>>> graph;
map<int, int> sums, tempsums;
vector<int> sub;
int k, centroid;
int ans = inf;
int rem;
 
vector<bool> vis, mark;
int dfs1(int node, int par) {
    int val = 1;
    mark[node] = true;
    for(auto it : graph[node]) {
        if(it.first == par)
            continue;
        if(vis[it.first])
            continue;
        val += dfs1(it.first, node);
    }
    sub[node] = val;
    return val;
}

void dfs2(int node, int par, int cur, int len) {
    if(cur > k)
        return;
    if(k == cur)
        ans = min(ans, len);
    else if(sums[k - cur])
        ans = min(ans, sums[k - cur] + len);

    for(auto it : graph[node]) {
        if(vis[it.first])
            continue;
        if(it.first == par)
            continue;
        if(node == centroid) {
            for(auto it: tempsums) {
                if(!sums[it.first])
                    sums[it.first] = it.second;
                sums[it.first] = min(it.second, sums[it.first]);
            }
            tempsums.clear();
        }
        dfs2(it.first, node, cur + it.second, len + 1);
    }

    if(!tempsums[cur])
        tempsums[cur] = len;
    
    tempsums[cur] = min(len, tempsums[cur]);
    return;
}

int findcentroid(int node, int par, int sz) {
    for(auto it : graph[node]){
        if(vis[it.first])
            continue;
        if(it.first == par)
            continue;
        if(sub[it.first] >= sz / 2)
            return findcentroid(it.first, node, sz);
    }
    return node;
}

int best_path(int32_t N, int32_t K, int32_t H[][2], int32_t L[]) {
    rem = N;
    k = K;

    graph.assign(N + 5, vector<pair<int, int>>());
    vis.assign(N + 5, false);
    
    for(int i = 0; i < N - 1; i++) {
        graph[H[i][1]].push_back({H[i][0], L[i]});
        graph[H[i][0]].push_back({H[i][1], L[i]});
    }

    while(rem) {
        mark.assign(N + 5, false);
        sub.assign(N + 5, 0);
        for(int i = 0; i < N; i++) {
            sums.clear();
            tempsums.clear();
            if(mark[i] || vis[i])
                continue;
            int sz = dfs1(i, -1);
            centroid = findcentroid(i, -1, sz);
            dfs2(centroid, -1, 0, 0);
            vis[centroid] = true;
            rem--;
        }
    }

    if(ans == inf)
        return -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 2 ms 2396 KB Output is correct
21 Correct 3 ms 2396 KB Output is correct
22 Correct 2 ms 2648 KB Output is correct
23 Correct 2 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 3 ms 2652 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 3 ms 2392 KB Output is correct
29 Correct 3 ms 2652 KB Output is correct
30 Correct 3 ms 2672 KB Output is correct
31 Correct 3 ms 2652 KB Output is correct
32 Correct 3 ms 2652 KB Output is correct
33 Correct 4 ms 2652 KB Output is correct
34 Correct 2 ms 2396 KB Output is correct
35 Correct 2 ms 2396 KB Output is correct
36 Correct 2 ms 2396 KB Output is correct
37 Correct 2 ms 2652 KB Output is correct
38 Correct 4 ms 2652 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 226 ms 12240 KB Output is correct
20 Correct 217 ms 12380 KB Output is correct
21 Correct 240 ms 12488 KB Output is correct
22 Correct 216 ms 12600 KB Output is correct
23 Correct 83 ms 12628 KB Output is correct
24 Correct 83 ms 12712 KB Output is correct
25 Correct 136 ms 15248 KB Output is correct
26 Correct 92 ms 18996 KB Output is correct
27 Correct 223 ms 20672 KB Output is correct
28 Correct 278 ms 32080 KB Output is correct
29 Correct 268 ms 31060 KB Output is correct
30 Correct 198 ms 20564 KB Output is correct
31 Correct 245 ms 20672 KB Output is correct
32 Correct 252 ms 20564 KB Output is correct
33 Correct 389 ms 19540 KB Output is correct
34 Correct 176 ms 20232 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2392 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 2 ms 2396 KB Output is correct
21 Correct 3 ms 2396 KB Output is correct
22 Correct 2 ms 2648 KB Output is correct
23 Correct 2 ms 2396 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 3 ms 2652 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 3 ms 2392 KB Output is correct
29 Correct 3 ms 2652 KB Output is correct
30 Correct 3 ms 2672 KB Output is correct
31 Correct 3 ms 2652 KB Output is correct
32 Correct 3 ms 2652 KB Output is correct
33 Correct 4 ms 2652 KB Output is correct
34 Correct 2 ms 2396 KB Output is correct
35 Correct 2 ms 2396 KB Output is correct
36 Correct 2 ms 2396 KB Output is correct
37 Correct 2 ms 2652 KB Output is correct
38 Correct 4 ms 2652 KB Output is correct
39 Correct 226 ms 12240 KB Output is correct
40 Correct 217 ms 12380 KB Output is correct
41 Correct 240 ms 12488 KB Output is correct
42 Correct 216 ms 12600 KB Output is correct
43 Correct 83 ms 12628 KB Output is correct
44 Correct 83 ms 12712 KB Output is correct
45 Correct 136 ms 15248 KB Output is correct
46 Correct 92 ms 18996 KB Output is correct
47 Correct 223 ms 20672 KB Output is correct
48 Correct 278 ms 32080 KB Output is correct
49 Correct 268 ms 31060 KB Output is correct
50 Correct 198 ms 20564 KB Output is correct
51 Correct 245 ms 20672 KB Output is correct
52 Correct 252 ms 20564 KB Output is correct
53 Correct 389 ms 19540 KB Output is correct
54 Correct 176 ms 20232 KB Output is correct
55 Correct 29 ms 3420 KB Output is correct
56 Correct 16 ms 3308 KB Output is correct
57 Correct 139 ms 12768 KB Output is correct
58 Correct 47 ms 12448 KB Output is correct
59 Correct 435 ms 27124 KB Output is correct
60 Correct 1153 ms 51016 KB Output is correct
61 Correct 299 ms 20820 KB Output is correct
62 Correct 379 ms 21128 KB Output is correct
63 Correct 430 ms 21140 KB Output is correct
64 Correct 1688 ms 32296 KB Output is correct
65 Correct 257 ms 21616 KB Output is correct
66 Correct 789 ms 29768 KB Output is correct
67 Correct 137 ms 21540 KB Output is correct
68 Correct 589 ms 28796 KB Output is correct
69 Correct 537 ms 28500 KB Output is correct
70 Correct 539 ms 27472 KB Output is correct