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답안 #104117

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
104117 2019-04-04T06:02:35 Z rkocharyan 경주 (Race) (IOI11_race) C++14
100 / 100
 897 ms 39476 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());

const int N = 2e5 + 7;
const int K = 1e6 + 7;
const int LG = 20;
const int inf = 1e9 + 7;

int n, k;
int sz[N];
bool used[N];
vector <pair <int, int> > g[N];
vector <int> dp(K, inf);
vector <int> kek(K, inf);
vector <int> go;
int ans = inf;

void calc(int v, int pr) {
    sz[v] = 1;
    for (auto to : g[v]) {
        if (to.first != pr && !used[to.first]) {
            calc(to.first, v);
            sz[v] += sz[to.first];
        }
    }
}

int centroid(int v, int pr, int need) {
    for (auto to : g[v]) {
        if (to.first != pr && !used[to.first] && sz[to.first] > need / 2) {
            return centroid(to.first, v, need);
        }
    }
    return v;
}

void dfs(int v, int pr, int h, int cur) {
    if (cur > k) {
        return;
    }
    go.push_back(cur);
    kek[cur] = min(kek[cur], h);
    for (auto to : g[v]) {
        if (to.first != pr && !used[to.first]) {
            dfs(to.first, v, h + 1, cur + to.second);
        }
    }
}

void build(int v, int lg) {
    calc(v, -1);
    v = centroid(v, -1, sz[v]);
    dp[0] = 0;
    kek[0] = 0;
    vector <int> kekos;
    for (auto to : g[v]) {
        if (!used[to.first]) {
            dfs(to.first, v, 1, to.second);
            go.push_back(0);
            for (int x : go) {
                ans = min(ans, kek[x] + dp[k - x]);
            }
            for (int x : go) {
                dp[x] = min(dp[x], kek[x]);
                kek[x] = inf;
            }
            while (!go.empty()) {
                kekos.push_back(go.back());
                go.pop_back();
            }
        }
    }
    for (int x : kekos) {
        dp[x] = inf;
    }
    used[v] = true;
    for (auto to : g[v]) {
        if (!used[to.first]) {
            build(to.first, lg + 1);
        }
    }
}

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, v, l;
        u = H[i][0];
        v = H[i][1];
        l = L[i];
        g[u].push_back({v, l});
        g[v].push_back({u, l});
    }
    build(0, 0);
    return (ans == inf ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12928 KB Output is correct
2 Correct 16 ms 12928 KB Output is correct
3 Correct 13 ms 12928 KB Output is correct
4 Correct 14 ms 12928 KB Output is correct
5 Correct 10 ms 12920 KB Output is correct
6 Correct 18 ms 12928 KB Output is correct
7 Correct 16 ms 12928 KB Output is correct
8 Correct 14 ms 12928 KB Output is correct
9 Correct 15 ms 12928 KB Output is correct
10 Correct 14 ms 12928 KB Output is correct
11 Correct 17 ms 12920 KB Output is correct
12 Correct 16 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 15 ms 12928 KB Output is correct
15 Correct 14 ms 12928 KB Output is correct
16 Correct 14 ms 12928 KB Output is correct
17 Correct 13 ms 12928 KB Output is correct
18 Correct 15 ms 12928 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12928 KB Output is correct
2 Correct 16 ms 12928 KB Output is correct
3 Correct 13 ms 12928 KB Output is correct
4 Correct 14 ms 12928 KB Output is correct
5 Correct 10 ms 12920 KB Output is correct
6 Correct 18 ms 12928 KB Output is correct
7 Correct 16 ms 12928 KB Output is correct
8 Correct 14 ms 12928 KB Output is correct
9 Correct 15 ms 12928 KB Output is correct
10 Correct 14 ms 12928 KB Output is correct
11 Correct 17 ms 12920 KB Output is correct
12 Correct 16 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 15 ms 12928 KB Output is correct
15 Correct 14 ms 12928 KB Output is correct
16 Correct 14 ms 12928 KB Output is correct
17 Correct 13 ms 12928 KB Output is correct
18 Correct 15 ms 12928 KB Output is correct
19 Correct 14 ms 12928 KB Output is correct
20 Correct 14 ms 12928 KB Output is correct
21 Correct 14 ms 12928 KB Output is correct
22 Correct 14 ms 12928 KB Output is correct
23 Correct 17 ms 12928 KB Output is correct
24 Correct 16 ms 13056 KB Output is correct
25 Correct 16 ms 13056 KB Output is correct
26 Correct 14 ms 12928 KB Output is correct
27 Correct 15 ms 12928 KB Output is correct
28 Correct 17 ms 12928 KB Output is correct
29 Correct 15 ms 13056 KB Output is correct
30 Correct 17 ms 12976 KB Output is correct
31 Correct 14 ms 12928 KB Output is correct
32 Correct 17 ms 12928 KB Output is correct
33 Correct 14 ms 12928 KB Output is correct
34 Correct 17 ms 12928 KB Output is correct
35 Correct 16 ms 12928 KB Output is correct
36 Correct 15 ms 12928 KB Output is correct
37 Correct 14 ms 12928 KB Output is correct
38 Correct 18 ms 12928 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12928 KB Output is correct
2 Correct 16 ms 12928 KB Output is correct
3 Correct 13 ms 12928 KB Output is correct
4 Correct 14 ms 12928 KB Output is correct
5 Correct 10 ms 12920 KB Output is correct
6 Correct 18 ms 12928 KB Output is correct
7 Correct 16 ms 12928 KB Output is correct
8 Correct 14 ms 12928 KB Output is correct
9 Correct 15 ms 12928 KB Output is correct
10 Correct 14 ms 12928 KB Output is correct
11 Correct 17 ms 12920 KB Output is correct
12 Correct 16 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 15 ms 12928 KB Output is correct
15 Correct 14 ms 12928 KB Output is correct
16 Correct 14 ms 12928 KB Output is correct
17 Correct 13 ms 12928 KB Output is correct
18 Correct 15 ms 12928 KB Output is correct
19 Correct 236 ms 18440 KB Output is correct
20 Correct 196 ms 18412 KB Output is correct
21 Correct 227 ms 18804 KB Output is correct
22 Correct 204 ms 19184 KB Output is correct
23 Correct 159 ms 18488 KB Output is correct
24 Correct 103 ms 18348 KB Output is correct
25 Correct 293 ms 21112 KB Output is correct
26 Correct 158 ms 25128 KB Output is correct
27 Correct 293 ms 23852 KB Output is correct
28 Correct 559 ms 34936 KB Output is correct
29 Correct 616 ms 34040 KB Output is correct
30 Correct 273 ms 23936 KB Output is correct
31 Correct 255 ms 23708 KB Output is correct
32 Correct 296 ms 23928 KB Output is correct
33 Correct 493 ms 22816 KB Output is correct
34 Correct 427 ms 22648 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 12928 KB Output is correct
2 Correct 16 ms 12928 KB Output is correct
3 Correct 13 ms 12928 KB Output is correct
4 Correct 14 ms 12928 KB Output is correct
5 Correct 10 ms 12920 KB Output is correct
6 Correct 18 ms 12928 KB Output is correct
7 Correct 16 ms 12928 KB Output is correct
8 Correct 14 ms 12928 KB Output is correct
9 Correct 15 ms 12928 KB Output is correct
10 Correct 14 ms 12928 KB Output is correct
11 Correct 17 ms 12920 KB Output is correct
12 Correct 16 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 15 ms 12928 KB Output is correct
15 Correct 14 ms 12928 KB Output is correct
16 Correct 14 ms 12928 KB Output is correct
17 Correct 13 ms 12928 KB Output is correct
18 Correct 15 ms 12928 KB Output is correct
19 Correct 14 ms 12928 KB Output is correct
20 Correct 14 ms 12928 KB Output is correct
21 Correct 14 ms 12928 KB Output is correct
22 Correct 14 ms 12928 KB Output is correct
23 Correct 17 ms 12928 KB Output is correct
24 Correct 16 ms 13056 KB Output is correct
25 Correct 16 ms 13056 KB Output is correct
26 Correct 14 ms 12928 KB Output is correct
27 Correct 15 ms 12928 KB Output is correct
28 Correct 17 ms 12928 KB Output is correct
29 Correct 15 ms 13056 KB Output is correct
30 Correct 17 ms 12976 KB Output is correct
31 Correct 14 ms 12928 KB Output is correct
32 Correct 17 ms 12928 KB Output is correct
33 Correct 14 ms 12928 KB Output is correct
34 Correct 17 ms 12928 KB Output is correct
35 Correct 16 ms 12928 KB Output is correct
36 Correct 15 ms 12928 KB Output is correct
37 Correct 14 ms 12928 KB Output is correct
38 Correct 18 ms 12928 KB Output is correct
39 Correct 236 ms 18440 KB Output is correct
40 Correct 196 ms 18412 KB Output is correct
41 Correct 227 ms 18804 KB Output is correct
42 Correct 204 ms 19184 KB Output is correct
43 Correct 159 ms 18488 KB Output is correct
44 Correct 103 ms 18348 KB Output is correct
45 Correct 293 ms 21112 KB Output is correct
46 Correct 158 ms 25128 KB Output is correct
47 Correct 293 ms 23852 KB Output is correct
48 Correct 559 ms 34936 KB Output is correct
49 Correct 616 ms 34040 KB Output is correct
50 Correct 273 ms 23936 KB Output is correct
51 Correct 255 ms 23708 KB Output is correct
52 Correct 296 ms 23928 KB Output is correct
53 Correct 493 ms 22816 KB Output is correct
54 Correct 427 ms 22648 KB Output is correct
55 Correct 25 ms 13668 KB Output is correct
56 Correct 27 ms 13568 KB Output is correct
57 Correct 109 ms 19312 KB Output is correct
58 Correct 55 ms 19948 KB Output is correct
59 Correct 123 ms 25196 KB Output is correct
60 Correct 897 ms 39476 KB Output is correct
61 Correct 306 ms 27200 KB Output is correct
62 Correct 304 ms 27640 KB Output is correct
63 Correct 432 ms 27640 KB Output is correct
64 Correct 791 ms 29004 KB Output is correct
65 Correct 366 ms 27512 KB Output is correct
66 Correct 718 ms 35324 KB Output is correct
67 Correct 228 ms 30412 KB Output is correct
68 Correct 432 ms 28628 KB Output is correct
69 Correct 429 ms 28928 KB Output is correct
70 Correct 378 ms 28024 KB Output is correct