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답안 #421846

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
421846 2021-06-09T12:56:31 Z arayi 경주 (Race) (IOI11_race) C++17
100 / 100
 1039 ms 54552 KB 
#include "race.h"
#include <bits/stdc++.h>
#define ad push_back
#define MP make_pair
#define fr first
#define sc second
using namespace std;

const int N = 1e6 + 20;
const int mod = 1e9 + 7;

int n, k;
vector<pair<int, int> > g[N];
int sz[N], col[N], ans = mod, cl[N];
queue <int> q;
void dfs0(int v, int par)
{
    sz[v] = 1;
    for(auto p : g[v])
    {
        if(col[p.fr] || p.fr == par) continue;
        dfs0(p.fr, v);
        sz[v] += sz[p.fr];
    }
}
int dfs1(int v, int par, int s)
{
    for(auto p : g[v])
    {
        if(col[p.fr] || p.fr == par) continue;
        if(sz[p.fr] > s / 2) return dfs1(p.fr, v, s);
    }
    return v;
}

void dfs(int v, int par, int l, int d, int bl)
{
    if(bl == 0)
    {
        cl[d] = mod;
        if(d <= k) cl[k - d] = mod;
    }
    if(bl == 1) if(d <= k) ans = min(ans, l + cl[k - d]);
    if(bl == 2) cl[d] = min(cl[d], l);
    for(auto p : g[v])
    {
        if(p.fr == par || col[p.fr]) continue;
        dfs(p.fr, v, l + 1, min(k + 1, d + p.sc), bl);
    }
}
int best_path(int N, int K, int H[][2], int L[])
{
    n = N; k = K;
    for (int i = 0; i < n - 1; i++)
    {
        g[H[i][0]].ad(MP(H[i][1], L[i]));
        g[H[i][1]].ad(MP(H[i][0], L[i]));
    }
    q.push(1);
    while(!q.empty())
    {
        int c = q.front();
        dfs0(c, c);
        c = dfs1(c, c, sz[c]);
        q.pop();
        col[c] = 1;
        for(auto p : g[c]) if(!col[p.fr]) q.push(p.fr);
        dfs(c, c, 0, 0, 0);
        cl[0] = 0;
        for(auto p : g[c])
        {
            if(!col[p.fr])
            {
                dfs(p.fr, c, 1, p.sc, 1);
                dfs(p.fr, c, 1, p.sc, 2);
            }
        }
    }
    if(ans == mod) return -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 14 ms 23712 KB Output is correct
3 Correct 14 ms 23800 KB Output is correct
4 Correct 15 ms 23756 KB Output is correct
5 Correct 14 ms 23756 KB Output is correct
6 Correct 14 ms 23792 KB Output is correct
7 Correct 16 ms 23756 KB Output is correct
8 Correct 14 ms 23784 KB Output is correct
9 Correct 20 ms 23820 KB Output is correct
10 Correct 14 ms 23756 KB Output is correct
11 Correct 16 ms 23800 KB Output is correct
12 Correct 16 ms 23788 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 14 ms 23788 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 16 ms 23760 KB Output is correct
18 Correct 14 ms 23756 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 14 ms 23712 KB Output is correct
3 Correct 14 ms 23800 KB Output is correct
4 Correct 15 ms 23756 KB Output is correct
5 Correct 14 ms 23756 KB Output is correct
6 Correct 14 ms 23792 KB Output is correct
7 Correct 16 ms 23756 KB Output is correct
8 Correct 14 ms 23784 KB Output is correct
9 Correct 20 ms 23820 KB Output is correct
10 Correct 14 ms 23756 KB Output is correct
11 Correct 16 ms 23800 KB Output is correct
12 Correct 16 ms 23788 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 14 ms 23788 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 16 ms 23760 KB Output is correct
18 Correct 14 ms 23756 KB Output is correct
19 Correct 14 ms 23756 KB Output is correct
20 Correct 17 ms 23792 KB Output is correct
21 Correct 16 ms 23884 KB Output is correct
22 Correct 16 ms 27376 KB Output is correct
23 Correct 16 ms 27252 KB Output is correct
24 Correct 18 ms 27132 KB Output is correct
25 Correct 16 ms 27000 KB Output is correct
26 Correct 17 ms 25212 KB Output is correct
27 Correct 16 ms 23804 KB Output is correct
28 Correct 15 ms 24648 KB Output is correct
29 Correct 15 ms 25084 KB Output is correct
30 Correct 18 ms 25292 KB Output is correct
31 Correct 19 ms 26356 KB Output is correct
32 Correct 17 ms 26572 KB Output is correct
33 Correct 16 ms 26872 KB Output is correct
34 Correct 19 ms 26188 KB Output is correct
35 Correct 16 ms 26956 KB Output is correct
36 Correct 17 ms 27464 KB Output is correct
37 Correct 21 ms 26872 KB Output is correct
38 Correct 17 ms 25804 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 14 ms 23712 KB Output is correct
3 Correct 14 ms 23800 KB Output is correct
4 Correct 15 ms 23756 KB Output is correct
5 Correct 14 ms 23756 KB Output is correct
6 Correct 14 ms 23792 KB Output is correct
7 Correct 16 ms 23756 KB Output is correct
8 Correct 14 ms 23784 KB Output is correct
9 Correct 20 ms 23820 KB Output is correct
10 Correct 14 ms 23756 KB Output is correct
11 Correct 16 ms 23800 KB Output is correct
12 Correct 16 ms 23788 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 14 ms 23788 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 16 ms 23760 KB Output is correct
18 Correct 14 ms 23756 KB Output is correct
19 Correct 287 ms 30820 KB Output is correct
20 Correct 293 ms 30764 KB Output is correct
21 Correct 273 ms 30848 KB Output is correct
22 Correct 242 ms 30936 KB Output is correct
23 Correct 167 ms 31252 KB Output is correct
24 Correct 110 ms 31256 KB Output is correct
25 Correct 240 ms 37408 KB Output is correct
26 Correct 139 ms 38184 KB Output is correct
27 Correct 348 ms 38296 KB Output is correct
28 Correct 735 ms 51864 KB Output is correct
29 Correct 848 ms 46684 KB Output is correct
30 Correct 338 ms 38392 KB Output is correct
31 Correct 326 ms 38476 KB Output is correct
32 Correct 509 ms 38500 KB Output is correct
33 Correct 533 ms 37140 KB Output is correct
34 Correct 580 ms 41936 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 14 ms 23712 KB Output is correct
3 Correct 14 ms 23800 KB Output is correct
4 Correct 15 ms 23756 KB Output is correct
5 Correct 14 ms 23756 KB Output is correct
6 Correct 14 ms 23792 KB Output is correct
7 Correct 16 ms 23756 KB Output is correct
8 Correct 14 ms 23784 KB Output is correct
9 Correct 20 ms 23820 KB Output is correct
10 Correct 14 ms 23756 KB Output is correct
11 Correct 16 ms 23800 KB Output is correct
12 Correct 16 ms 23788 KB Output is correct
13 Correct 14 ms 23824 KB Output is correct
14 Correct 14 ms 23788 KB Output is correct
15 Correct 14 ms 23788 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 16 ms 23760 KB Output is correct
18 Correct 14 ms 23756 KB Output is correct
19 Correct 14 ms 23756 KB Output is correct
20 Correct 17 ms 23792 KB Output is correct
21 Correct 16 ms 23884 KB Output is correct
22 Correct 16 ms 27376 KB Output is correct
23 Correct 16 ms 27252 KB Output is correct
24 Correct 18 ms 27132 KB Output is correct
25 Correct 16 ms 27000 KB Output is correct
26 Correct 17 ms 25212 KB Output is correct
27 Correct 16 ms 23804 KB Output is correct
28 Correct 15 ms 24648 KB Output is correct
29 Correct 15 ms 25084 KB Output is correct
30 Correct 18 ms 25292 KB Output is correct
31 Correct 19 ms 26356 KB Output is correct
32 Correct 17 ms 26572 KB Output is correct
33 Correct 16 ms 26872 KB Output is correct
34 Correct 19 ms 26188 KB Output is correct
35 Correct 16 ms 26956 KB Output is correct
36 Correct 17 ms 27464 KB Output is correct
37 Correct 21 ms 26872 KB Output is correct
38 Correct 17 ms 25804 KB Output is correct
39 Correct 287 ms 30820 KB Output is correct
40 Correct 293 ms 30764 KB Output is correct
41 Correct 273 ms 30848 KB Output is correct
42 Correct 242 ms 30936 KB Output is correct
43 Correct 167 ms 31252 KB Output is correct
44 Correct 110 ms 31256 KB Output is correct
45 Correct 240 ms 37408 KB Output is correct
46 Correct 139 ms 38184 KB Output is correct
47 Correct 348 ms 38296 KB Output is correct
48 Correct 735 ms 51864 KB Output is correct
49 Correct 848 ms 46684 KB Output is correct
50 Correct 338 ms 38392 KB Output is correct
51 Correct 326 ms 38476 KB Output is correct
52 Correct 509 ms 38500 KB Output is correct
53 Correct 533 ms 37140 KB Output is correct
54 Correct 580 ms 41936 KB Output is correct
55 Correct 25 ms 24432 KB Output is correct
56 Correct 26 ms 24440 KB Output is correct
57 Correct 140 ms 31180 KB Output is correct
58 Correct 54 ms 31032 KB Output is correct
59 Correct 140 ms 38808 KB Output is correct
60 Correct 763 ms 49160 KB Output is correct
61 Correct 315 ms 38556 KB Output is correct
62 Correct 380 ms 38576 KB Output is correct
63 Correct 563 ms 38600 KB Output is correct
64 Correct 1039 ms 40656 KB Output is correct
65 Correct 777 ms 43080 KB Output is correct
66 Correct 1016 ms 54552 KB Output is correct
67 Correct 177 ms 39704 KB Output is correct
68 Correct 483 ms 42100 KB Output is correct
69 Correct 514 ms 42556 KB Output is correct
70 Correct 455 ms 41588 KB Output is correct