oj.uz

Submission #726624

# Submission time Handle Problem Language Result Execution time Memory
726624 2023-04-19T06:52:28 Z btkhg Race (IOI11_race) C++14
100 / 100
 481 ms 32216 KB 
#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

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5144 KB Output is correct
4 Correct 3 ms 5152 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 3 ms 5152 KB Output is correct
7 Correct 3 ms 5144 KB Output is correct
8 Correct 3 ms 5148 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 4 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5144 KB Output is correct
4 Correct 3 ms 5152 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 3 ms 5152 KB Output is correct
7 Correct 3 ms 5144 KB Output is correct
8 Correct 3 ms 5148 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 4 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 3 ms 5144 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 4 ms 5220 KB Output is correct
22 Correct 6 ms 8868 KB Output is correct
23 Correct 5 ms 8148 KB Output is correct
24 Correct 5 ms 8660 KB Output is correct
25 Correct 7 ms 8524 KB Output is correct
26 Correct 4 ms 6568 KB Output is correct
27 Correct 5 ms 8416 KB Output is correct
28 Correct 4 ms 6044 KB Output is correct
29 Correct 4 ms 6484 KB Output is correct
30 Correct 5 ms 6612 KB Output is correct
31 Correct 5 ms 7768 KB Output is correct
32 Correct 5 ms 8020 KB Output is correct
33 Correct 6 ms 8228 KB Output is correct
34 Correct 5 ms 7508 KB Output is correct
35 Correct 6 ms 8416 KB Output is correct
36 Correct 5 ms 8916 KB Output is correct
37 Correct 5 ms 8404 KB Output is correct
38 Correct 5 ms 7252 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5144 KB Output is correct
4 Correct 3 ms 5152 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 3 ms 5152 KB Output is correct
7 Correct 3 ms 5144 KB Output is correct
8 Correct 3 ms 5148 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 4 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 115 ms 11756 KB Output is correct
20 Correct 145 ms 11784 KB Output is correct
21 Correct 144 ms 11808 KB Output is correct
22 Correct 128 ms 11864 KB Output is correct
23 Correct 75 ms 12108 KB Output is correct
24 Correct 51 ms 12008 KB Output is correct
25 Correct 116 ms 16892 KB Output is correct
26 Correct 88 ms 17456 KB Output is correct
27 Correct 156 ms 18772 KB Output is correct
28 Correct 217 ms 29312 KB Output is correct
29 Correct 237 ms 25036 KB Output is correct
30 Correct 144 ms 18676 KB Output is correct
31 Correct 149 ms 18788 KB Output is correct
32 Correct 178 ms 18884 KB Output is correct
33 Correct 202 ms 17584 KB Output is correct
34 Correct 162 ms 18488 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5204 KB Output is correct
2 Correct 3 ms 5204 KB Output is correct
3 Correct 3 ms 5144 KB Output is correct
4 Correct 3 ms 5152 KB Output is correct
5 Correct 3 ms 5204 KB Output is correct
6 Correct 3 ms 5152 KB Output is correct
7 Correct 3 ms 5144 KB Output is correct
8 Correct 3 ms 5148 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 4 ms 5204 KB Output is correct
18 Correct 3 ms 5204 KB Output is correct
19 Correct 3 ms 5144 KB Output is correct
20 Correct 3 ms 5204 KB Output is correct
21 Correct 4 ms 5220 KB Output is correct
22 Correct 6 ms 8868 KB Output is correct
23 Correct 5 ms 8148 KB Output is correct
24 Correct 5 ms 8660 KB Output is correct
25 Correct 7 ms 8524 KB Output is correct
26 Correct 4 ms 6568 KB Output is correct
27 Correct 5 ms 8416 KB Output is correct
28 Correct 4 ms 6044 KB Output is correct
29 Correct 4 ms 6484 KB Output is correct
30 Correct 5 ms 6612 KB Output is correct
31 Correct 5 ms 7768 KB Output is correct
32 Correct 5 ms 8020 KB Output is correct
33 Correct 6 ms 8228 KB Output is correct
34 Correct 5 ms 7508 KB Output is correct
35 Correct 6 ms 8416 KB Output is correct
36 Correct 5 ms 8916 KB Output is correct
37 Correct 5 ms 8404 KB Output is correct
38 Correct 5 ms 7252 KB Output is correct
39 Correct 115 ms 11756 KB Output is correct
40 Correct 145 ms 11784 KB Output is correct
41 Correct 144 ms 11808 KB Output is correct
42 Correct 128 ms 11864 KB Output is correct
43 Correct 75 ms 12108 KB Output is correct
44 Correct 51 ms 12008 KB Output is correct
45 Correct 116 ms 16892 KB Output is correct
46 Correct 88 ms 17456 KB Output is correct
47 Correct 156 ms 18772 KB Output is correct
48 Correct 217 ms 29312 KB Output is correct
49 Correct 237 ms 25036 KB Output is correct
50 Correct 144 ms 18676 KB Output is correct
51 Correct 149 ms 18788 KB Output is correct
52 Correct 178 ms 18884 KB Output is correct
53 Correct 202 ms 17584 KB Output is correct
54 Correct 162 ms 18488 KB Output is correct
55 Correct 10 ms 5844 KB Output is correct
56 Correct 12 ms 5844 KB Output is correct
57 Correct 81 ms 12020 KB Output is correct
58 Correct 34 ms 11712 KB Output is correct
59 Correct 90 ms 18184 KB Output is correct
60 Correct 442 ms 29192 KB Output is correct
61 Correct 163 ms 18908 KB Output is correct
62 Correct 183 ms 22840 KB Output is correct
63 Correct 267 ms 22780 KB Output is correct
64 Correct 481 ms 20848 KB Output is correct
65 Correct 224 ms 19020 KB Output is correct
66 Correct 422 ms 32216 KB Output is correct
67 Correct 120 ms 23236 KB Output is correct
68 Correct 257 ms 23116 KB Output is correct
69 Correct 258 ms 23328 KB Output is correct
70 Correct 217 ms 22664 KB Output is correct