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Submission #715996

# Submission time Handle Problem Language Result Execution time Memory
715996 2023-03-28T18:20:25 Z ovidiush11 Race (IOI11_race) C++14
100 / 100
 461 ms 82748 KB 
#include <bits/stdc++.h>
#include "race.h"

using namespace std;

const int N_ = 2e5+1;

vector<vector<pair<int,int>>> a;
map<int,int> mp[N_];
int n,k,len[N_],sum[N_],ans = 1e9;

void dfs(int pos,int last,int ln,int sm)
{
    len[pos] = ln;
    sum[pos] = sm;
    mp[pos][sm] = ln;
    for(auto x : a[pos])
    {
        if(x.first == last)continue;
        dfs(x.first,pos,ln+1,sm+x.second);
    }
    return ;
}

void solve(int pos,int last)
{
    int K = k + 2 * sum[pos];
    for(auto v : a[pos])
    {
        if(v.first == last)continue;
        solve(v.first,pos);
        if(mp[v.first].size() > mp[pos].size())swap(mp[v.first],mp[pos]);
        for(auto i : mp[v.first])
        {
            if(mp[pos].find(K-i.first) != mp[pos].end()){
                ans = min(ans,mp[pos][K-i.first] + i.second - 2 * len[pos]);
            }
        }
        for(auto i : mp[v.first]){
            if(mp[pos].find(i.first) == mp[pos].end()){
                mp[pos].insert(i);
            }else{
                mp[pos][i.first] = min(mp[pos][i.first],i.second);
            }
        }
    }
}

int best_path(int n_, int k_, int h[][2], int l[])
{
    n = n_;k = k_;
    a.resize(n);
    for(int i = 0;i < n-1;i++)
    {
        int x = h[i][0],y = h[i][1];
        a[x].push_back({y,l[i]});
        a[y].push_back({x,l[i]});
    }
    dfs(0,-1,0,0);
    solve(0,-1);
    if(ans == 1e9)return -1;
    else return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9708 KB Output is correct
4 Correct 5 ms 9704 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9704 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9700 KB Output is correct
12 Correct 5 ms 9704 KB Output is correct
13 Correct 5 ms 9688 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 5 ms 9684 KB Output is correct
16 Correct 5 ms 9708 KB Output is correct
17 Correct 6 ms 9684 KB Output is correct
18 Correct 7 ms 9684 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9708 KB Output is correct
4 Correct 5 ms 9704 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9704 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9700 KB Output is correct
12 Correct 5 ms 9704 KB Output is correct
13 Correct 5 ms 9688 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 5 ms 9684 KB Output is correct
16 Correct 5 ms 9708 KB Output is correct
17 Correct 6 ms 9684 KB Output is correct
18 Correct 7 ms 9684 KB Output is correct
19 Correct 7 ms 9712 KB Output is correct
20 Correct 5 ms 9744 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 6 ms 9940 KB Output is correct
23 Correct 7 ms 9940 KB Output is correct
24 Correct 8 ms 9940 KB Output is correct
25 Correct 6 ms 9972 KB Output is correct
26 Correct 7 ms 9968 KB Output is correct
27 Correct 6 ms 9812 KB Output is correct
28 Correct 7 ms 9972 KB Output is correct
29 Correct 7 ms 9972 KB Output is correct
30 Correct 6 ms 9940 KB Output is correct
31 Correct 6 ms 9940 KB Output is correct
32 Correct 6 ms 9940 KB Output is correct
33 Correct 6 ms 9940 KB Output is correct
34 Correct 6 ms 9976 KB Output is correct
35 Correct 5 ms 9864 KB Output is correct
36 Correct 7 ms 9844 KB Output is correct
37 Correct 6 ms 9940 KB Output is correct
38 Correct 6 ms 9940 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9708 KB Output is correct
4 Correct 5 ms 9704 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9704 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9700 KB Output is correct
12 Correct 5 ms 9704 KB Output is correct
13 Correct 5 ms 9688 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 5 ms 9684 KB Output is correct
16 Correct 5 ms 9708 KB Output is correct
17 Correct 6 ms 9684 KB Output is correct
18 Correct 7 ms 9684 KB Output is correct
19 Correct 122 ms 30700 KB Output is correct
20 Correct 157 ms 30668 KB Output is correct
21 Correct 139 ms 30432 KB Output is correct
22 Correct 135 ms 30360 KB Output is correct
23 Correct 213 ms 39852 KB Output is correct
24 Correct 128 ms 32832 KB Output is correct
25 Correct 99 ms 32680 KB Output is correct
26 Correct 61 ms 40332 KB Output is correct
27 Correct 197 ms 42988 KB Output is correct
28 Correct 303 ms 80672 KB Output is correct
29 Correct 339 ms 77368 KB Output is correct
30 Correct 212 ms 41712 KB Output is correct
31 Correct 203 ms 41932 KB Output is correct
32 Correct 302 ms 41804 KB Output is correct
33 Correct 301 ms 45256 KB Output is correct
34 Correct 356 ms 69128 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9708 KB Output is correct
4 Correct 5 ms 9704 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 6 ms 9812 KB Output is correct
7 Correct 5 ms 9704 KB Output is correct
8 Correct 5 ms 9704 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9700 KB Output is correct
12 Correct 5 ms 9704 KB Output is correct
13 Correct 5 ms 9688 KB Output is correct
14 Correct 5 ms 9684 KB Output is correct
15 Correct 5 ms 9684 KB Output is correct
16 Correct 5 ms 9708 KB Output is correct
17 Correct 6 ms 9684 KB Output is correct
18 Correct 7 ms 9684 KB Output is correct
19 Correct 7 ms 9712 KB Output is correct
20 Correct 5 ms 9744 KB Output is correct
21 Correct 7 ms 9836 KB Output is correct
22 Correct 6 ms 9940 KB Output is correct
23 Correct 7 ms 9940 KB Output is correct
24 Correct 8 ms 9940 KB Output is correct
25 Correct 6 ms 9972 KB Output is correct
26 Correct 7 ms 9968 KB Output is correct
27 Correct 6 ms 9812 KB Output is correct
28 Correct 7 ms 9972 KB Output is correct
29 Correct 7 ms 9972 KB Output is correct
30 Correct 6 ms 9940 KB Output is correct
31 Correct 6 ms 9940 KB Output is correct
32 Correct 6 ms 9940 KB Output is correct
33 Correct 6 ms 9940 KB Output is correct
34 Correct 6 ms 9976 KB Output is correct
35 Correct 5 ms 9864 KB Output is correct
36 Correct 7 ms 9844 KB Output is correct
37 Correct 6 ms 9940 KB Output is correct
38 Correct 6 ms 9940 KB Output is correct
39 Correct 122 ms 30700 KB Output is correct
40 Correct 157 ms 30668 KB Output is correct
41 Correct 139 ms 30432 KB Output is correct
42 Correct 135 ms 30360 KB Output is correct
43 Correct 213 ms 39852 KB Output is correct
44 Correct 128 ms 32832 KB Output is correct
45 Correct 99 ms 32680 KB Output is correct
46 Correct 61 ms 40332 KB Output is correct
47 Correct 197 ms 42988 KB Output is correct
48 Correct 303 ms 80672 KB Output is correct
49 Correct 339 ms 77368 KB Output is correct
50 Correct 212 ms 41712 KB Output is correct
51 Correct 203 ms 41932 KB Output is correct
52 Correct 302 ms 41804 KB Output is correct
53 Correct 301 ms 45256 KB Output is correct
54 Correct 356 ms 69128 KB Output is correct
55 Correct 20 ms 12500 KB Output is correct
56 Correct 13 ms 11476 KB Output is correct
57 Correct 72 ms 28716 KB Output is correct
58 Correct 50 ms 23636 KB Output is correct
59 Correct 85 ms 45004 KB Output is correct
60 Correct 288 ms 78064 KB Output is correct
61 Correct 283 ms 44216 KB Output is correct
62 Correct 219 ms 41736 KB Output is correct
63 Correct 288 ms 41760 KB Output is correct
64 Correct 461 ms 82748 KB Output is correct
65 Correct 428 ms 81056 KB Output is correct
66 Correct 312 ms 73112 KB Output is correct
67 Correct 197 ms 37352 KB Output is correct
68 Correct 364 ms 53912 KB Output is correct
69 Correct 379 ms 57760 KB Output is correct
70 Correct 332 ms 52304 KB Output is correct