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답안 #1104250

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1104250 2024-10-23T10:05:16 Z LonlyR 경주 (Race) (IOI11_race) C++17
100 / 100
 318 ms 62288 KB 
#include<bits/stdc++.h>

using namespace std;
const int maxn = 1e6 + 5;
int n, k, ans = -1;
int sz[maxn], mark[maxn], cnt[maxn];
vector<pair<int,int>> adj[maxn];

void get_size(int x, int p)
{
    sz[x] = 1;
    for (auto [i, j] : adj[x]) if (i != p && !mark[i])
        get_size(i, x),
        sz[x] += sz[i];
}

int find(int x, int p, int half)
{
    for (auto [i, j] : adj[x]) if (i != p && !mark[i] && sz[i] > half)
        return find(i, x, half);
    return x;
}

void dfs(int x, int p, int h, int d, int t)
{
    if (h > k) return;
    if (t == 0)
    {
        if (cnt[k - h] != -1)
        {
            if (ans == -1)
                ans = d + cnt[k - h];
            else ans = min(ans, d + cnt[k - h]);
        }
    } else if (cnt[h] == -1) cnt[h] = d; else cnt[h] = min(cnt[h], d);
    for (auto [i, j] : adj[x]) if (i != p && !mark[i])
        dfs(i, x, h + j, d + 1, t);
}

void reset(int x, int p, int h)
{
    if (h > k) return;
    cnt[h] = -1;
    for (auto [i, j] : adj[x])if (i != p && !mark[i])
        reset(i, x, h + j);
}

void solve(int x = 1)
{
    get_size(x, x);
    x = find(x, x, sz[x] / 2);
    mark[x] = 1;
    cnt[0] = 0;
    for (auto [i, j] : adj[x]) if (!mark[i])
        dfs(i, x, j, 1, 0),
        dfs(i, x, j, 1, 1);
    reset(x, x, 0);
    for (auto [i, j] : adj[x]) if (!mark[i])
        solve(i);
}

int best_path(int N, int K, int H[][2], int L[])
{
    n = N, k = K;
    memset(cnt, -1, sizeof cnt);
    for(int i = 0; i < n - 1; i++){
        int u = H[i][0] + 1, v = H[i][1] + 1, w = L[i];
        adj[u].emplace_back(v, w);
        adj[v].emplace_back(u, w);
    }
    solve();
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35152 KB Output is correct
2 Correct 6 ms 35284 KB Output is correct
3 Correct 7 ms 35152 KB Output is correct
4 Correct 6 ms 35152 KB Output is correct
5 Correct 7 ms 35152 KB Output is correct
6 Correct 7 ms 35320 KB Output is correct
7 Correct 6 ms 35152 KB Output is correct
8 Correct 6 ms 35292 KB Output is correct
9 Correct 6 ms 35152 KB Output is correct
10 Correct 6 ms 35320 KB Output is correct
11 Correct 6 ms 35152 KB Output is correct
12 Correct 6 ms 35152 KB Output is correct
13 Correct 7 ms 35152 KB Output is correct
14 Correct 6 ms 35152 KB Output is correct
15 Correct 7 ms 35152 KB Output is correct
16 Correct 7 ms 35152 KB Output is correct
17 Correct 8 ms 35408 KB Output is correct
18 Correct 6 ms 35152 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35152 KB Output is correct
2 Correct 6 ms 35284 KB Output is correct
3 Correct 7 ms 35152 KB Output is correct
4 Correct 6 ms 35152 KB Output is correct
5 Correct 7 ms 35152 KB Output is correct
6 Correct 7 ms 35320 KB Output is correct
7 Correct 6 ms 35152 KB Output is correct
8 Correct 6 ms 35292 KB Output is correct
9 Correct 6 ms 35152 KB Output is correct
10 Correct 6 ms 35320 KB Output is correct
11 Correct 6 ms 35152 KB Output is correct
12 Correct 6 ms 35152 KB Output is correct
13 Correct 7 ms 35152 KB Output is correct
14 Correct 6 ms 35152 KB Output is correct
15 Correct 7 ms 35152 KB Output is correct
16 Correct 7 ms 35152 KB Output is correct
17 Correct 8 ms 35408 KB Output is correct
18 Correct 6 ms 35152 KB Output is correct
19 Correct 7 ms 35152 KB Output is correct
20 Correct 5 ms 35152 KB Output is correct
21 Correct 6 ms 35380 KB Output is correct
22 Correct 6 ms 35152 KB Output is correct
23 Correct 6 ms 35152 KB Output is correct
24 Correct 6 ms 35152 KB Output is correct
25 Correct 6 ms 35152 KB Output is correct
26 Correct 6 ms 35152 KB Output is correct
27 Correct 6 ms 35152 KB Output is correct
28 Correct 6 ms 35324 KB Output is correct
29 Correct 7 ms 35152 KB Output is correct
30 Correct 6 ms 35152 KB Output is correct
31 Correct 7 ms 35324 KB Output is correct
32 Correct 7 ms 35152 KB Output is correct
33 Correct 6 ms 35152 KB Output is correct
34 Correct 7 ms 35328 KB Output is correct
35 Correct 7 ms 35152 KB Output is correct
36 Correct 7 ms 35152 KB Output is correct
37 Correct 6 ms 35152 KB Output is correct
38 Correct 7 ms 35152 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35152 KB Output is correct
2 Correct 6 ms 35284 KB Output is correct
3 Correct 7 ms 35152 KB Output is correct
4 Correct 6 ms 35152 KB Output is correct
5 Correct 7 ms 35152 KB Output is correct
6 Correct 7 ms 35320 KB Output is correct
7 Correct 6 ms 35152 KB Output is correct
8 Correct 6 ms 35292 KB Output is correct
9 Correct 6 ms 35152 KB Output is correct
10 Correct 6 ms 35320 KB Output is correct
11 Correct 6 ms 35152 KB Output is correct
12 Correct 6 ms 35152 KB Output is correct
13 Correct 7 ms 35152 KB Output is correct
14 Correct 6 ms 35152 KB Output is correct
15 Correct 7 ms 35152 KB Output is correct
16 Correct 7 ms 35152 KB Output is correct
17 Correct 8 ms 35408 KB Output is correct
18 Correct 6 ms 35152 KB Output is correct
19 Correct 104 ms 42568 KB Output is correct
20 Correct 89 ms 42320 KB Output is correct
21 Correct 94 ms 42448 KB Output is correct
22 Correct 92 ms 42568 KB Output is correct
23 Correct 55 ms 42832 KB Output is correct
24 Correct 45 ms 42576 KB Output is correct
25 Correct 103 ms 46144 KB Output is correct
26 Correct 87 ms 49736 KB Output is correct
27 Correct 105 ms 47944 KB Output is correct
28 Correct 172 ms 62288 KB Output is correct
29 Correct 172 ms 61208 KB Output is correct
30 Correct 109 ms 47888 KB Output is correct
31 Correct 109 ms 47956 KB Output is correct
32 Correct 115 ms 47944 KB Output is correct
33 Correct 146 ms 46664 KB Output is correct
34 Correct 119 ms 47632 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 35152 KB Output is correct
2 Correct 6 ms 35284 KB Output is correct
3 Correct 7 ms 35152 KB Output is correct
4 Correct 6 ms 35152 KB Output is correct
5 Correct 7 ms 35152 KB Output is correct
6 Correct 7 ms 35320 KB Output is correct
7 Correct 6 ms 35152 KB Output is correct
8 Correct 6 ms 35292 KB Output is correct
9 Correct 6 ms 35152 KB Output is correct
10 Correct 6 ms 35320 KB Output is correct
11 Correct 6 ms 35152 KB Output is correct
12 Correct 6 ms 35152 KB Output is correct
13 Correct 7 ms 35152 KB Output is correct
14 Correct 6 ms 35152 KB Output is correct
15 Correct 7 ms 35152 KB Output is correct
16 Correct 7 ms 35152 KB Output is correct
17 Correct 8 ms 35408 KB Output is correct
18 Correct 6 ms 35152 KB Output is correct
19 Correct 7 ms 35152 KB Output is correct
20 Correct 5 ms 35152 KB Output is correct
21 Correct 6 ms 35380 KB Output is correct
22 Correct 6 ms 35152 KB Output is correct
23 Correct 6 ms 35152 KB Output is correct
24 Correct 6 ms 35152 KB Output is correct
25 Correct 6 ms 35152 KB Output is correct
26 Correct 6 ms 35152 KB Output is correct
27 Correct 6 ms 35152 KB Output is correct
28 Correct 6 ms 35324 KB Output is correct
29 Correct 7 ms 35152 KB Output is correct
30 Correct 6 ms 35152 KB Output is correct
31 Correct 7 ms 35324 KB Output is correct
32 Correct 7 ms 35152 KB Output is correct
33 Correct 6 ms 35152 KB Output is correct
34 Correct 7 ms 35328 KB Output is correct
35 Correct 7 ms 35152 KB Output is correct
36 Correct 7 ms 35152 KB Output is correct
37 Correct 6 ms 35152 KB Output is correct
38 Correct 7 ms 35152 KB Output is correct
39 Correct 104 ms 42568 KB Output is correct
40 Correct 89 ms 42320 KB Output is correct
41 Correct 94 ms 42448 KB Output is correct
42 Correct 92 ms 42568 KB Output is correct
43 Correct 55 ms 42832 KB Output is correct
44 Correct 45 ms 42576 KB Output is correct
45 Correct 103 ms 46144 KB Output is correct
46 Correct 87 ms 49736 KB Output is correct
47 Correct 105 ms 47944 KB Output is correct
48 Correct 172 ms 62288 KB Output is correct
49 Correct 172 ms 61208 KB Output is correct
50 Correct 109 ms 47888 KB Output is correct
51 Correct 109 ms 47956 KB Output is correct
52 Correct 115 ms 47944 KB Output is correct
53 Correct 146 ms 46664 KB Output is correct
54 Correct 119 ms 47632 KB Output is correct
55 Correct 12 ms 35664 KB Output is correct
56 Correct 13 ms 35840 KB Output is correct
57 Correct 59 ms 42576 KB Output is correct
58 Correct 28 ms 42436 KB Output is correct
59 Correct 80 ms 49740 KB Output is correct
60 Correct 318 ms 61512 KB Output is correct
61 Correct 127 ms 47944 KB Output is correct
62 Correct 135 ms 47944 KB Output is correct
63 Correct 138 ms 48132 KB Output is correct
64 Correct 256 ms 48200 KB Output is correct
65 Correct 99 ms 48784 KB Output is correct
66 Correct 221 ms 58764 KB Output is correct
67 Correct 67 ms 49228 KB Output is correct
68 Correct 133 ms 48712 KB Output is correct
69 Correct 144 ms 48968 KB Output is correct
70 Correct 127 ms 48456 KB Output is correct