oj.uz

Submission #1024824

# Submission time Handle Problem Language Result Execution time Memory
1024824 2024-07-16T10:47:07 Z idas Race (IOI11_race) C++11
100 / 100
 1175 ms 54296 KB 
#include "race.h"
#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define pb push_back
#define s second
#define f first

using namespace std;

typedef pair<int, int> pii;

const int MxN=2e5+10;
vector<pii> ad[MxN];
bool v[MxN];
int sz[MxN];

void get_sizes(int u, int pst=-1)
{
    sz[u]=1;
    for(auto it : ad[u]){
        int x=it.f;
        if(v[x] || x==pst) continue;
        get_sizes(x, u);
        sz[u]+=sz[x];
    }
}

int get_centroid(int u, int max_size, int pst=-1)
{
    for(auto it : ad[u]){
        int x=it.f;
        if(v[x] || x==pst) continue;
        if(sz[x]>max_size/2){
            return get_centroid(x, max_size, u);
        }
    }
    return u;
}

void trav(int u, multiset<pii> &st, int w_sum, int cn, int pst=-1)
{
    st.insert({w_sum,cn});
    for(auto it : ad[u]){
        int x=it.f, w=it.s;
        if(v[x] || x==pst) continue;
        trav(x, st, w_sum+w, cn+1, u);
    }
}

int ans=1e9;
void calc_paths(int u, int k)
{
    int nb=ad[u].size();
    multiset<pii> st[nb], full;
    FOR(i, 0, nb)
    {
        int x=ad[u][i].f, w=ad[u][i].s;
        if(v[x]) continue;
        trav(x, st[i], w, 1, u);
        for(auto it : st[i]){
            full.insert(it);
        }
    }

    full.insert({0,0});

//    cout << u << ":\n";
//    for(auto it : full){
//        cout << it.f << " " << it.s << '\n';
//    }

    FOR(i, 0, nb)
    {
        for(auto it : st[i]){
            full.erase(full.find(it));
        }

        for(auto it : st[i]){
            auto fnd=full.lower_bound({k-it.f,0});
            if(fnd!=full.end() && (*fnd).f==k-it.f){
                ans=min(ans, it.s+(*fnd).s);
            }
        }

        for(auto it : st[i]){
            full.insert(it);
        }
    }
}

void dfs(int u, int k)
{
    get_sizes(u);
    int ct=get_centroid(u, sz[u]);

//    cout << u << " " << ct << endl;

    calc_paths(ct, k);

    v[ct]=true;
    for(auto it : ad[ct]){
        int x=it.f;
        if(v[x]) continue;
        dfs(x, k);
    }
}

int best_path(int n, int k, int h[][2], int l[])
{
    FOR(i, 0, n-1)
    {
        ad[h[i][0]].pb({h[i][1],l[i]});
        ad[h[i][1]].pb({h[i][0],l[i]});
    }

    dfs(0, k);

    return (ans==int(1e9)?-1:ans);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9652 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 1 ms 9564 KB Output is correct
13 Correct 2 ms 9772 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9636 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9652 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 1 ms 9564 KB Output is correct
13 Correct 2 ms 9772 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9636 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct
22 Correct 4 ms 9820 KB Output is correct
23 Correct 4 ms 9820 KB Output is correct
24 Correct 4 ms 9820 KB Output is correct
25 Correct 3 ms 9768 KB Output is correct
26 Correct 3 ms 9772 KB Output is correct
27 Correct 3 ms 9820 KB Output is correct
28 Correct 4 ms 9820 KB Output is correct
29 Correct 5 ms 9820 KB Output is correct
30 Correct 4 ms 9820 KB Output is correct
31 Correct 3 ms 9896 KB Output is correct
32 Correct 3 ms 9820 KB Output is correct
33 Correct 4 ms 9752 KB Output is correct
34 Correct 4 ms 9820 KB Output is correct
35 Correct 3 ms 9820 KB Output is correct
36 Correct 3 ms 9820 KB Output is correct
37 Correct 3 ms 9820 KB Output is correct
38 Correct 4 ms 9892 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9652 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 1 ms 9564 KB Output is correct
13 Correct 2 ms 9772 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9636 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 507 ms 24916 KB Output is correct
20 Correct 467 ms 26140 KB Output is correct
21 Correct 448 ms 25728 KB Output is correct
22 Correct 403 ms 26436 KB Output is correct
23 Correct 582 ms 26452 KB Output is correct
24 Correct 266 ms 26452 KB Output is correct
25 Correct 504 ms 30292 KB Output is correct
26 Correct 381 ms 32852 KB Output is correct
27 Correct 443 ms 39860 KB Output is correct
28 Correct 1082 ms 54296 KB Output is correct
29 Correct 1097 ms 53244 KB Output is correct
30 Correct 452 ms 40276 KB Output is correct
31 Correct 451 ms 40420 KB Output is correct
32 Correct 487 ms 40020 KB Output is correct
33 Correct 905 ms 39360 KB Output is correct
34 Correct 1040 ms 39516 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9564 KB Output is correct
2 Correct 2 ms 9564 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9652 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 2 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 2 ms 9564 KB Output is correct
11 Correct 2 ms 9564 KB Output is correct
12 Correct 1 ms 9564 KB Output is correct
13 Correct 2 ms 9772 KB Output is correct
14 Correct 2 ms 9564 KB Output is correct
15 Correct 2 ms 9560 KB Output is correct
16 Correct 2 ms 9636 KB Output is correct
17 Correct 2 ms 9564 KB Output is correct
18 Correct 2 ms 9564 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct
22 Correct 4 ms 9820 KB Output is correct
23 Correct 4 ms 9820 KB Output is correct
24 Correct 4 ms 9820 KB Output is correct
25 Correct 3 ms 9768 KB Output is correct
26 Correct 3 ms 9772 KB Output is correct
27 Correct 3 ms 9820 KB Output is correct
28 Correct 4 ms 9820 KB Output is correct
29 Correct 5 ms 9820 KB Output is correct
30 Correct 4 ms 9820 KB Output is correct
31 Correct 3 ms 9896 KB Output is correct
32 Correct 3 ms 9820 KB Output is correct
33 Correct 4 ms 9752 KB Output is correct
34 Correct 4 ms 9820 KB Output is correct
35 Correct 3 ms 9820 KB Output is correct
36 Correct 3 ms 9820 KB Output is correct
37 Correct 3 ms 9820 KB Output is correct
38 Correct 4 ms 9892 KB Output is correct
39 Correct 507 ms 24916 KB Output is correct
40 Correct 467 ms 26140 KB Output is correct
41 Correct 448 ms 25728 KB Output is correct
42 Correct 403 ms 26436 KB Output is correct
43 Correct 582 ms 26452 KB Output is correct
44 Correct 266 ms 26452 KB Output is correct
45 Correct 504 ms 30292 KB Output is correct
46 Correct 381 ms 32852 KB Output is correct
47 Correct 443 ms 39860 KB Output is correct
48 Correct 1082 ms 54296 KB Output is correct
49 Correct 1097 ms 53244 KB Output is correct
50 Correct 452 ms 40276 KB Output is correct
51 Correct 451 ms 40420 KB Output is correct
52 Correct 487 ms 40020 KB Output is correct
53 Correct 905 ms 39360 KB Output is correct
54 Correct 1040 ms 39516 KB Output is correct
55 Correct 29 ms 11096 KB Output is correct
56 Correct 37 ms 11096 KB Output is correct
57 Correct 516 ms 25428 KB Output is correct
58 Correct 91 ms 30916 KB Output is correct
59 Correct 448 ms 33104 KB Output is correct
60 Correct 1095 ms 53584 KB Output is correct
61 Correct 475 ms 39704 KB Output is correct
62 Correct 438 ms 40276 KB Output is correct
63 Correct 453 ms 40020 KB Output is correct
64 Correct 1084 ms 38992 KB Output is correct
65 Correct 931 ms 41556 KB Output is correct
66 Correct 1175 ms 48960 KB Output is correct
67 Correct 267 ms 51132 KB Output is correct
68 Correct 518 ms 40272 KB Output is correct
69 Correct 530 ms 38484 KB Output is correct
70 Correct 566 ms 39596 KB Output is correct