oj.uz

Submission #556283

# Submission time Handle Problem Language Result Execution time Memory
556283 2022-05-02T18:25:45 Z n0sk1ll Race (IOI11_race) C++17
100 / 100
 1291 ms 42376 KB 
#include "race.h"
#include <bits/stdc++.h>

#define xx first
#define yy second

using namespace std;
long long int typedef li;

vector<vector<pair<int,int>>> g(200005);
int ch[200005],ans=1e9;
bitset<200005> vis;

li K;

void dfs(int p, int q)
{
    ch[p]=1;
    for (auto [it,w] : g[p]) if (it!=q && !vis[it]) dfs(it,p),ch[p]+=ch[it];
}

int centroid(int p, int q, int s)
{
    int c=p;
    for (auto [it,w] : g[p]) if (it!=q && !vis[it])
    {
        int tmp=centroid(it,p,s);
        if (tmp!=-1) return tmp;
        if (2*ch[it]>s) c=-1;
    }
    if (2*ch[p]<s) c=-1;
    return c;
}

map<li,int> dub;

void add(int p, int q, li s, int d)
{
    auto it=dub.find(s);
    if (it==dub.end()) dub[s]=d;
    else it->yy=min(it->yy,d);
    for (auto [it,w] : g[p]) if (it!=q && !vis[it]) add(it,p,s+w,d+1);
}

void iter(int p, int q, li s, int d)
{
    auto it=dub.find(K-s);
    if (it!=dub.end()) ans=min(ans,d+it->yy);
    for (auto [it,w] : g[p]) if (it!=q && !vis[it]) iter(it,p,s+w,d+1);
}

void decomp(int p)
{
    dfs(p,-1);
    int c=centroid(p,-1,ch[p]);
    //cout<<","<<c<<endl;

    dub.clear(); dub[0]=0;
    for (auto [it,w] : g[c]) if (!vis[it]) iter(it,c,w,1),add(it,c,w,1);

    vis[c]=1;
    for (auto [it,w] : g[c]) if (!vis[it]) decomp(it);
}

int best_path(int n, int k, int H[][2], int L[])
{
    for (int i=0;i<n-1;i++) g[H[i][0]].push_back({H[i][1],L[i]}),g[H[i][1]].push_back({H[i][0],L[i]});
    K=k,decomp(0); return (ans==1e9?-1:ans);
}

/*

11 12
0 1 3
0 2 4
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7

7 3
0 1 1
0 4 1
4 5 1
5 6 1
1 2 3
1 3 2

7 8
0 1 1
0 4 1
4 5 1
5 6 1
1 2 3
1 3 2

*/

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 4 ms 5076 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 5 ms 5076 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5076 KB Output is correct
29 Correct 4 ms 5076 KB Output is correct
30 Correct 4 ms 5076 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 5 ms 5076 KB Output is correct
33 Correct 6 ms 5144 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5076 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 257 ms 10152 KB Output is correct
20 Correct 232 ms 10256 KB Output is correct
21 Correct 210 ms 10288 KB Output is correct
22 Correct 202 ms 10228 KB Output is correct
23 Correct 240 ms 10480 KB Output is correct
24 Correct 117 ms 10424 KB Output is correct
25 Correct 164 ms 14184 KB Output is correct
26 Correct 98 ms 17476 KB Output is correct
27 Correct 278 ms 15936 KB Output is correct
28 Correct 866 ms 42376 KB Output is correct
29 Correct 864 ms 41992 KB Output is correct
30 Correct 293 ms 16708 KB Output is correct
31 Correct 279 ms 16664 KB Output is correct
32 Correct 355 ms 16728 KB Output is correct
33 Correct 368 ms 15412 KB Output is correct
34 Correct 853 ms 27756 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 5028 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 2 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 2 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 4 ms 5076 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 4 ms 5076 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 5 ms 5076 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5076 KB Output is correct
29 Correct 4 ms 5076 KB Output is correct
30 Correct 4 ms 5076 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 5 ms 5076 KB Output is correct
33 Correct 6 ms 5144 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 4 ms 5076 KB Output is correct
36 Correct 4 ms 5076 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 257 ms 10152 KB Output is correct
40 Correct 232 ms 10256 KB Output is correct
41 Correct 210 ms 10288 KB Output is correct
42 Correct 202 ms 10228 KB Output is correct
43 Correct 240 ms 10480 KB Output is correct
44 Correct 117 ms 10424 KB Output is correct
45 Correct 164 ms 14184 KB Output is correct
46 Correct 98 ms 17476 KB Output is correct
47 Correct 278 ms 15936 KB Output is correct
48 Correct 866 ms 42376 KB Output is correct
49 Correct 864 ms 41992 KB Output is correct
50 Correct 293 ms 16708 KB Output is correct
51 Correct 279 ms 16664 KB Output is correct
52 Correct 355 ms 16728 KB Output is correct
53 Correct 368 ms 15412 KB Output is correct
54 Correct 853 ms 27756 KB Output is correct
55 Correct 23 ms 5928 KB Output is correct
56 Correct 15 ms 5588 KB Output is correct
57 Correct 127 ms 11288 KB Output is correct
58 Correct 43 ms 11252 KB Output is correct
59 Correct 251 ms 23020 KB Output is correct
60 Correct 895 ms 41420 KB Output is correct
61 Correct 340 ms 18308 KB Output is correct
62 Correct 310 ms 16620 KB Output is correct
63 Correct 396 ms 16624 KB Output is correct
64 Correct 1291 ms 22236 KB Output is correct
65 Correct 1054 ms 28820 KB Output is correct
66 Correct 1045 ms 39476 KB Output is correct
67 Correct 147 ms 16748 KB Output is correct
68 Correct 598 ms 27208 KB Output is correct
69 Correct 533 ms 27484 KB Output is correct
70 Correct 494 ms 26420 KB Output is correct