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답안 #726528

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
726528 2023-04-19T03:46:23 Z hoainiem 경주 (Race) (IOI11_race) C++14
100 / 100
 542 ms 32280 KB 
#include "race.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define nmax 200008
#define kmax 1000008
const int inf = 1e9;
using namespace std;
typedef pair<int, int> pii;
int n, k, lim, ans = inf, sz[nmax], f[kmax];
bool kt[nmax];
vector<pii>l[nmax];
int dfs(int x, int pre){
    sz[x] = 1;
    for (pii it : l[x]){
        if (it.fi == pre || kt[it.fi])
            continue;
        sz[x] += dfs(it.fi, x);
    }
    return sz[x];
}
int centroid(int rt, int x, int pre){
    for (pii it : l[x]){
        if (it.fi == pre || kt[it.fi])
            continue;
        if (sz[it.fi] * 2 > sz[rt])
            return centroid(rt, it.fi, x);
    }
    return x;
}
void calc(int x, int pre, int dis, int d, int flag){
    if (dis > k)
        return;
    switch(flag){
        case 0:
            ans = min(ans, f[k - dis] + d);
            break;
        case 1:
            f[dis] = min(f[dis], d);
            break;
        default:
            f[dis] = inf;
            break;
    }
    for (pii it : l[x]){
        if (it.fi == pre || kt[it.fi])
            continue;
        calc(it.fi, x, dis + it.se, d + 1, flag);
    }
}
void centroid(int x){
    dfs(x, x);
    x = centroid(x, x, x);
    f[0] = 0;
    for (pii it : l[x])
        if (!kt[it.fi]){
            calc(it.fi, x, it.se, 1, 0);
            calc(it.fi, x, it.se, 1, 1);
        }
    for (pii it : l[x])
        if (!kt[it.fi])
            calc(it.fi, x, it.se, 1, 2);
    kt[x] = 1;
    f[0] = inf;
    for (pii it : l[x])
        if (!kt[it.fi])
            centroid(it.fi);
}
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 = H[i][0], v = H[i][1], w = L[i];
        l[u].push_back({v, w});
        l[v].push_back({u, w});
    }
    memset(kt, false, sizeof(kt));
    fill(f, f + k + 1, inf);
    centroid(1);
    if (ans >= n)
        ans = -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 2 ms 5204 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 2 ms 5204 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5204 KB Output is correct
11 Correct 3 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 3 ms 5204 KB Output is correct
14 Correct 3 ms 5204 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 2 ms 5204 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 2 ms 5204 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5204 KB Output is correct
11 Correct 3 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 3 ms 5204 KB Output is correct
14 Correct 3 ms 5204 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 4 ms 5204 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 4 ms 5204 KB Output is correct
22 Correct 4 ms 8796 KB Output is correct
23 Correct 6 ms 8148 KB Output is correct
24 Correct 5 ms 8660 KB Output is correct
25 Correct 5 ms 8532 KB Output is correct
26 Correct 4 ms 6484 KB Output is correct
27 Correct 5 ms 8352 KB Output is correct
28 Correct 4 ms 6056 KB Output is correct
29 Correct 4 ms 6484 KB Output is correct
30 Correct 5 ms 6612 KB Output is correct
31 Correct 4 ms 7764 KB Output is correct
32 Correct 5 ms 8020 KB Output is correct
33 Correct 5 ms 8232 KB Output is correct
34 Correct 5 ms 7588 KB Output is correct
35 Correct 6 ms 8444 KB Output is correct
36 Correct 5 ms 8916 KB Output is correct
37 Correct 5 ms 8404 KB Output is correct
38 Correct 4 ms 7204 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 2 ms 5204 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 2 ms 5204 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5204 KB Output is correct
11 Correct 3 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 3 ms 5204 KB Output is correct
14 Correct 3 ms 5204 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 125 ms 10572 KB Output is correct
20 Correct 121 ms 10432 KB Output is correct
21 Correct 153 ms 10444 KB Output is correct
22 Correct 114 ms 10424 KB Output is correct
23 Correct 71 ms 10684 KB Output is correct
24 Correct 48 ms 10580 KB Output is correct
25 Correct 117 ms 15540 KB Output is correct
26 Correct 87 ms 16100 KB Output is correct
27 Correct 155 ms 15824 KB Output is correct
28 Correct 239 ms 26292 KB Output is correct
29 Correct 247 ms 21964 KB Output is correct
30 Correct 160 ms 15764 KB Output is correct
31 Correct 165 ms 15868 KB Output is correct
32 Correct 175 ms 15884 KB Output is correct
33 Correct 208 ms 14672 KB Output is correct
34 Correct 175 ms 14660 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5204 KB Output is correct
4 Correct 2 ms 5204 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 2 ms 5204 KB Output is correct
7 Correct 3 ms 5204 KB Output is correct
8 Correct 3 ms 5204 KB Output is correct
9 Correct 3 ms 5204 KB Output is correct
10 Correct 3 ms 5204 KB Output is correct
11 Correct 3 ms 5204 KB Output is correct
12 Correct 3 ms 5204 KB Output is correct
13 Correct 3 ms 5204 KB Output is correct
14 Correct 3 ms 5204 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 3 ms 5204 KB Output is correct
17 Correct 3 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 4 ms 5204 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 4 ms 5204 KB Output is correct
22 Correct 4 ms 8796 KB Output is correct
23 Correct 6 ms 8148 KB Output is correct
24 Correct 5 ms 8660 KB Output is correct
25 Correct 5 ms 8532 KB Output is correct
26 Correct 4 ms 6484 KB Output is correct
27 Correct 5 ms 8352 KB Output is correct
28 Correct 4 ms 6056 KB Output is correct
29 Correct 4 ms 6484 KB Output is correct
30 Correct 5 ms 6612 KB Output is correct
31 Correct 4 ms 7764 KB Output is correct
32 Correct 5 ms 8020 KB Output is correct
33 Correct 5 ms 8232 KB Output is correct
34 Correct 5 ms 7588 KB Output is correct
35 Correct 6 ms 8444 KB Output is correct
36 Correct 5 ms 8916 KB Output is correct
37 Correct 5 ms 8404 KB Output is correct
38 Correct 4 ms 7204 KB Output is correct
39 Correct 125 ms 10572 KB Output is correct
40 Correct 121 ms 10432 KB Output is correct
41 Correct 153 ms 10444 KB Output is correct
42 Correct 114 ms 10424 KB Output is correct
43 Correct 71 ms 10684 KB Output is correct
44 Correct 48 ms 10580 KB Output is correct
45 Correct 117 ms 15540 KB Output is correct
46 Correct 87 ms 16100 KB Output is correct
47 Correct 155 ms 15824 KB Output is correct
48 Correct 239 ms 26292 KB Output is correct
49 Correct 247 ms 21964 KB Output is correct
50 Correct 160 ms 15764 KB Output is correct
51 Correct 165 ms 15868 KB Output is correct
52 Correct 175 ms 15884 KB Output is correct
53 Correct 208 ms 14672 KB Output is correct
54 Correct 175 ms 14660 KB Output is correct
55 Correct 11 ms 5800 KB Output is correct
56 Correct 12 ms 5864 KB Output is correct
57 Correct 78 ms 12020 KB Output is correct
58 Correct 33 ms 11664 KB Output is correct
59 Correct 93 ms 18316 KB Output is correct
60 Correct 485 ms 29228 KB Output is correct
61 Correct 177 ms 18908 KB Output is correct
62 Correct 206 ms 22748 KB Output is correct
63 Correct 263 ms 22752 KB Output is correct
64 Correct 542 ms 21024 KB Output is correct
65 Correct 197 ms 19668 KB Output is correct
66 Correct 369 ms 32280 KB Output is correct
67 Correct 110 ms 23344 KB Output is correct
68 Correct 255 ms 23508 KB Output is correct
69 Correct 255 ms 23660 KB Output is correct
70 Correct 238 ms 22916 KB Output is correct