oj.uz

답안 #425475

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
425475 2021-06-13T04:28:24 Z tht2005 경주 (Race) (IOI11_race) C++17
100 / 100
 907 ms 34684 KB 
/*
 *  Written by
 *       ______  _   _  ______  ____  ____  ____  ____
 *      |_    _|| |_| ||_    _||_   || __ || __ |/  _/
 *        |  |  |  _  |  |  |    / / ||  ||||  ||| |__
 *        |  |  | | | |  |  |   | |_ ||__||||__||\__  \
 *        |__|  |_| |_|  |__|   |___||____||____|/____/
 */

#include <bits/stdc++.h>
using namespace std;

#define nmax 200020
#define ii pair<int, int>
#define ll long long

int n, k, ans, cnt[1000100], sz[nmax], r[nmax];
vector<ii> adj[nmax];

inline void minimize(int &a, int b)
{
    if(a == -1 || a > b)
        a = b;
}

int dfs(int u, int p = -1)
{
    sz[u] = 1;
    for(auto [C, v]: adj[u]) {
        if(v != p && !r[v]) sz[u] += dfs(v, u);
    }
    return sz[u];
}

int get_centroid(int m, int u, int p = -1)
{
    for(auto [C, v]: adj[u]) {
        if(v != p && !r[v] && 2 * sz[v] > m) return get_centroid(m, v, u);
    }
    return u;
}

void get_cnt(int sum, bool filling, int u, int p = -1, int depth = 1)
{
    if(sum > k) return;
    if(filling)
        minimize(cnt[sum], depth);
    else {
        if(cnt[k - sum] != -1)
            minimize(ans, depth + cnt[k - sum]);
    }
    for(auto [C, v]: adj[u]) {
        if(v != p && !r[v]) get_cnt(sum + C, filling, v, u, depth + 1);
    }
}

void del(int sum, int u, int p = -1)
{
    if(sum > k) return;
    cnt[sum] = -1;
    for(auto [C, v]: adj[u]) {
        if(v != p && !r[v])
            del(sum + C, v, u);
    }
}

void centroid(int u = 0)
{
    u = get_centroid(dfs(u), u);
    r[u] = 1;
    cnt[0] = 0;
    for(auto [C, v]: adj[u]) {
        if(!r[v]) {
            get_cnt(C, false, v);
            get_cnt(C, true, v);
        }
    }
    for(auto [C, v]: adj[u]) {
        if(!r[v]) {
            del(C, v);
        }
    }
    for(auto [C, v]: adj[u]) {
        if(!r[v]) centroid(v);
    }
}

int best_path(int N, int K, int h[][2], int l[])
{
    n = N;
    k = K;
    for(int i = 0, u, v; i < n - 1; ++i) {
        u = h[i][0];
        v = h[i][1];
        adj[u].push_back(ii(l[i], v));
        adj[v].push_back(ii(l[i], u));
    }
    ans = -1;
    memset(cnt, -1, sizeof(cnt));
    centroid();
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 7 ms 8908 KB Output is correct
3 Correct 6 ms 8848 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 7 ms 8852 KB Output is correct
6 Correct 8 ms 8908 KB Output is correct
7 Correct 9 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 8 ms 8908 KB Output is correct
10 Correct 8 ms 8908 KB Output is correct
11 Correct 8 ms 8908 KB Output is correct
12 Correct 7 ms 8852 KB Output is correct
13 Correct 6 ms 8856 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 7 ms 8908 KB Output is correct
16 Correct 5 ms 8908 KB Output is correct
17 Correct 6 ms 8908 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 7 ms 8908 KB Output is correct
3 Correct 6 ms 8848 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 7 ms 8852 KB Output is correct
6 Correct 8 ms 8908 KB Output is correct
7 Correct 9 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 8 ms 8908 KB Output is correct
10 Correct 8 ms 8908 KB Output is correct
11 Correct 8 ms 8908 KB Output is correct
12 Correct 7 ms 8852 KB Output is correct
13 Correct 6 ms 8856 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 7 ms 8908 KB Output is correct
16 Correct 5 ms 8908 KB Output is correct
17 Correct 6 ms 8908 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 6 ms 8908 KB Output is correct
20 Correct 6 ms 8908 KB Output is correct
21 Correct 8 ms 8908 KB Output is correct
22 Correct 7 ms 8908 KB Output is correct
23 Correct 6 ms 8972 KB Output is correct
24 Correct 7 ms 8992 KB Output is correct
25 Correct 8 ms 8908 KB Output is correct
26 Correct 7 ms 8960 KB Output is correct
27 Correct 7 ms 9036 KB Output is correct
28 Correct 7 ms 8996 KB Output is correct
29 Correct 10 ms 8988 KB Output is correct
30 Correct 9 ms 8992 KB Output is correct
31 Correct 9 ms 8908 KB Output is correct
32 Correct 8 ms 8984 KB Output is correct
33 Correct 8 ms 8908 KB Output is correct
34 Correct 9 ms 8908 KB Output is correct
35 Correct 7 ms 8908 KB Output is correct
36 Correct 8 ms 8908 KB Output is correct
37 Correct 10 ms 8984 KB Output is correct
38 Correct 9 ms 8908 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 7 ms 8908 KB Output is correct
3 Correct 6 ms 8848 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 7 ms 8852 KB Output is correct
6 Correct 8 ms 8908 KB Output is correct
7 Correct 9 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 8 ms 8908 KB Output is correct
10 Correct 8 ms 8908 KB Output is correct
11 Correct 8 ms 8908 KB Output is correct
12 Correct 7 ms 8852 KB Output is correct
13 Correct 6 ms 8856 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 7 ms 8908 KB Output is correct
16 Correct 5 ms 8908 KB Output is correct
17 Correct 6 ms 8908 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 250 ms 15820 KB Output is correct
20 Correct 210 ms 15876 KB Output is correct
21 Correct 233 ms 15800 KB Output is correct
22 Correct 253 ms 16068 KB Output is correct
23 Correct 96 ms 16104 KB Output is correct
24 Correct 87 ms 16024 KB Output is correct
25 Correct 192 ms 18588 KB Output is correct
26 Correct 121 ms 21568 KB Output is correct
27 Correct 238 ms 23268 KB Output is correct
28 Correct 402 ms 34684 KB Output is correct
29 Correct 394 ms 33732 KB Output is correct
30 Correct 240 ms 23236 KB Output is correct
31 Correct 242 ms 23188 KB Output is correct
32 Correct 321 ms 23352 KB Output is correct
33 Correct 326 ms 22212 KB Output is correct
34 Correct 255 ms 23020 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8908 KB Output is correct
2 Correct 7 ms 8908 KB Output is correct
3 Correct 6 ms 8848 KB Output is correct
4 Correct 6 ms 8908 KB Output is correct
5 Correct 7 ms 8852 KB Output is correct
6 Correct 8 ms 8908 KB Output is correct
7 Correct 9 ms 8908 KB Output is correct
8 Correct 6 ms 8908 KB Output is correct
9 Correct 8 ms 8908 KB Output is correct
10 Correct 8 ms 8908 KB Output is correct
11 Correct 8 ms 8908 KB Output is correct
12 Correct 7 ms 8852 KB Output is correct
13 Correct 6 ms 8856 KB Output is correct
14 Correct 6 ms 8908 KB Output is correct
15 Correct 7 ms 8908 KB Output is correct
16 Correct 5 ms 8908 KB Output is correct
17 Correct 6 ms 8908 KB Output is correct
18 Correct 6 ms 8908 KB Output is correct
19 Correct 6 ms 8908 KB Output is correct
20 Correct 6 ms 8908 KB Output is correct
21 Correct 8 ms 8908 KB Output is correct
22 Correct 7 ms 8908 KB Output is correct
23 Correct 6 ms 8972 KB Output is correct
24 Correct 7 ms 8992 KB Output is correct
25 Correct 8 ms 8908 KB Output is correct
26 Correct 7 ms 8960 KB Output is correct
27 Correct 7 ms 9036 KB Output is correct
28 Correct 7 ms 8996 KB Output is correct
29 Correct 10 ms 8988 KB Output is correct
30 Correct 9 ms 8992 KB Output is correct
31 Correct 9 ms 8908 KB Output is correct
32 Correct 8 ms 8984 KB Output is correct
33 Correct 8 ms 8908 KB Output is correct
34 Correct 9 ms 8908 KB Output is correct
35 Correct 7 ms 8908 KB Output is correct
36 Correct 8 ms 8908 KB Output is correct
37 Correct 10 ms 8984 KB Output is correct
38 Correct 9 ms 8908 KB Output is correct
39 Correct 250 ms 15820 KB Output is correct
40 Correct 210 ms 15876 KB Output is correct
41 Correct 233 ms 15800 KB Output is correct
42 Correct 253 ms 16068 KB Output is correct
43 Correct 96 ms 16104 KB Output is correct
44 Correct 87 ms 16024 KB Output is correct
45 Correct 192 ms 18588 KB Output is correct
46 Correct 121 ms 21568 KB Output is correct
47 Correct 238 ms 23268 KB Output is correct
48 Correct 402 ms 34684 KB Output is correct
49 Correct 394 ms 33732 KB Output is correct
50 Correct 240 ms 23236 KB Output is correct
51 Correct 242 ms 23188 KB Output is correct
52 Correct 321 ms 23352 KB Output is correct
53 Correct 326 ms 22212 KB Output is correct
54 Correct 255 ms 23020 KB Output is correct
55 Correct 17 ms 9556 KB Output is correct
56 Correct 17 ms 9608 KB Output is correct
57 Correct 108 ms 16044 KB Output is correct
58 Correct 46 ms 15736 KB Output is correct
59 Correct 137 ms 21612 KB Output is correct
60 Correct 824 ms 33876 KB Output is correct
61 Correct 270 ms 23436 KB Output is correct
62 Correct 306 ms 23300 KB Output is correct
63 Correct 387 ms 23620 KB Output is correct
64 Correct 907 ms 23600 KB Output is correct
65 Correct 284 ms 24088 KB Output is correct
66 Correct 634 ms 31940 KB Output is correct
67 Correct 173 ms 23984 KB Output is correct
68 Correct 391 ms 24108 KB Output is correct
69 Correct 366 ms 24168 KB Output is correct
70 Correct 367 ms 23496 KB Output is correct