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Submission #751005

# Submission time Handle Problem Language Result Execution time Memory
751005 2023-05-30T19:01:39 Z sofija6 Railway (BOI17_railway) C++14
100 / 100
 144 ms 39000 KB 
#include <bits/stdc++.h>
#define ll long long
#define MAXN 100010
#define logn 18
using namespace std;
ll c[MAXN],t=2,up[MAXN][logn],in[MAXN],out[MAXN],k;
vector<pair<ll,ll> > G[MAXN];
vector<ll> ans;
void DFS(ll i,ll p)
{
    in[i]=t;
    t++;
    up[i][0]=p;
    for (ll j=1;j<logn;j++)
        up[i][j]=up[up[i][j-1]][j-1];
    for (auto next : G[i])
    {
        if (next.first!=p)
            DFS(next.first,i);
    }
    out[i]=t;
    t++;
}
bool Is_Ancestor(ll u,ll v)
{
    return in[u]<=in[v] && out[u]>=out[v];
}
ll LCA(ll u,ll v)
{
    if (Is_Ancestor(u,v))
        return u;
    if (Is_Ancestor(v,u))
        return v;
    for (ll i=logn-1;i>=0;i--)
    {
        if (!Is_Ancestor(up[u][i],v))
            u=up[u][i];
    }
    return up[u][0];
}
bool Cmp(ll x,ll y)
{
    return in[x]<in[y];
}
struct bit
{
    vector<ll> v;
    void Init()
    {
        v.resize(2*MAXN);
    }
    void Add(ll pos,ll val)
    {
        for (ll i=pos;i<2*MAXN;i+=i&(-i))
            v[i]+=val;
    }
    ll Calc(ll pos)
    {
        ll cur=0;
        for (ll i=pos;i>0;i-=i&(-i))
            cur+=v[i];
        return cur;
    }
    ll Query(ll l,ll r)
    {
        return Calc(r)-Calc(l-1);
    }
};
bit B;
void DFS_Solve(ll i,ll p)
{
    for (auto next : G[i])
    {
        if (next.first!=p)
        {
            if (B.Query(in[next.first],out[next.first])>=2*k)
                ans.push_back(next.second);
            DFS_Solve(next.first,i);
        }
    }
}
int main()
{
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,m,a,b,s;
    cin >> n >> m >> k;
    for (ll i=1;i<n;i++)
    {
        cin >> a >> b;
        G[a].push_back({b,i});
        G[b].push_back({a,i});
    }
    DFS(1,1);
    B.Init();
    for (ll i=1;i<=m;i++)
    {
        cin >> s;
        for (ll j=1;j<=s;j++)
            cin >> c[j];
        sort(c+1,c+1+s,Cmp);
        c[s+1]=c[1];
        for (ll j=2;j<=s+1;j++)
        {
            ll l=LCA(c[j-1],c[j]);
            B.Add(in[l],-2);
            B.Add(in[c[j-1]],1);
            B.Add(in[c[j]],1);
        }
    }
    DFS_Solve(1,1);
    sort(ans.begin(),ans.end());
    cout << ans.size() << "\n";
    for (ll i : ans)
        cout << i << " ";
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 7 ms 6356 KB Output is correct
3 Correct 7 ms 6356 KB Output is correct
4 Correct 2 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 9 ms 7084 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 8 ms 6484 KB Output is correct
9 Correct 8 ms 6408 KB Output is correct
10 Correct 2 ms 4212 KB Output is correct
11 Correct 3 ms 4180 KB Output is correct
12 Correct 2 ms 4180 KB Output is correct
13 Correct 3 ms 4180 KB Output is correct
14 Correct 2 ms 4180 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 7 ms 6356 KB Output is correct
3 Correct 7 ms 6356 KB Output is correct
4 Correct 2 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 9 ms 7084 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 8 ms 6484 KB Output is correct
9 Correct 8 ms 6408 KB Output is correct
10 Correct 2 ms 4212 KB Output is correct
11 Correct 3 ms 4180 KB Output is correct
12 Correct 2 ms 4180 KB Output is correct
13 Correct 3 ms 4180 KB Output is correct
14 Correct 2 ms 4180 KB Output is correct
15 Correct 31 ms 6884 KB Output is correct
16 Correct 26 ms 6812 KB Output is correct
17 Correct 27 ms 6932 KB Output is correct
18 Correct 8 ms 6996 KB Output is correct
19 Correct 7 ms 6484 KB Output is correct
20 Correct 33 ms 6932 KB Output is correct
21 Correct 40 ms 6820 KB Output is correct
22 Correct 3 ms 4180 KB Output is correct
23 Correct 8 ms 6400 KB Output is correct
24 Correct 7 ms 6400 KB Output is correct
25 Correct 3 ms 4180 KB Output is correct
26 Correct 2 ms 4180 KB Output is correct
27 Correct 8 ms 7044 KB Output is correct
28 Correct 7 ms 6484 KB Output is correct
29 Correct 7 ms 6356 KB Output is correct
30 Correct 7 ms 6356 KB Output is correct
31 Correct 3 ms 4180 KB Output is correct
32 Correct 3 ms 4208 KB Output is correct
33 Correct 3 ms 4180 KB Output is correct
34 Correct 3 ms 4180 KB Output is correct
35 Correct 2 ms 4180 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 38460 KB Output is correct
2 Correct 3 ms 4180 KB Output is correct
3 Correct 92 ms 38020 KB Output is correct
4 Correct 70 ms 37336 KB Output is correct
5 Correct 80 ms 38604 KB Output is correct
6 Correct 80 ms 39000 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 32264 KB Output is correct
2 Correct 135 ms 27368 KB Output is correct
3 Correct 119 ms 26696 KB Output is correct
4 Correct 120 ms 26692 KB Output is correct
5 Correct 128 ms 26776 KB Output is correct
6 Correct 89 ms 32460 KB Output is correct
7 Correct 94 ms 32380 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 32264 KB Output is correct
2 Correct 135 ms 27368 KB Output is correct
3 Correct 119 ms 26696 KB Output is correct
4 Correct 120 ms 26692 KB Output is correct
5 Correct 128 ms 26776 KB Output is correct
6 Correct 89 ms 32460 KB Output is correct
7 Correct 94 ms 32380 KB Output is correct
8 Correct 107 ms 32436 KB Output is correct
9 Correct 121 ms 32460 KB Output is correct
10 Correct 74 ms 38764 KB Output is correct
11 Correct 71 ms 38596 KB Output is correct
12 Correct 85 ms 26052 KB Output is correct
13 Correct 101 ms 26052 KB Output is correct
14 Correct 107 ms 26660 KB Output is correct
15 Correct 109 ms 26688 KB Output is correct
16 Correct 111 ms 26824 KB Output is correct
17 Correct 127 ms 26828 KB Output is correct
18 Correct 122 ms 26816 KB Output is correct
19 Correct 112 ms 27296 KB Output is correct
20 Correct 96 ms 32672 KB Output is correct
21 Correct 97 ms 32796 KB Output is correct
22 Correct 99 ms 32676 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 7 ms 6356 KB Output is correct
3 Correct 7 ms 6356 KB Output is correct
4 Correct 2 ms 4180 KB Output is correct
5 Correct 3 ms 4180 KB Output is correct
6 Correct 9 ms 7084 KB Output is correct
7 Correct 9 ms 6528 KB Output is correct
8 Correct 8 ms 6484 KB Output is correct
9 Correct 8 ms 6408 KB Output is correct
10 Correct 2 ms 4212 KB Output is correct
11 Correct 3 ms 4180 KB Output is correct
12 Correct 2 ms 4180 KB Output is correct
13 Correct 3 ms 4180 KB Output is correct
14 Correct 2 ms 4180 KB Output is correct
15 Correct 31 ms 6884 KB Output is correct
16 Correct 26 ms 6812 KB Output is correct
17 Correct 27 ms 6932 KB Output is correct
18 Correct 8 ms 6996 KB Output is correct
19 Correct 7 ms 6484 KB Output is correct
20 Correct 33 ms 6932 KB Output is correct
21 Correct 40 ms 6820 KB Output is correct
22 Correct 3 ms 4180 KB Output is correct
23 Correct 8 ms 6400 KB Output is correct
24 Correct 7 ms 6400 KB Output is correct
25 Correct 3 ms 4180 KB Output is correct
26 Correct 2 ms 4180 KB Output is correct
27 Correct 8 ms 7044 KB Output is correct
28 Correct 7 ms 6484 KB Output is correct
29 Correct 7 ms 6356 KB Output is correct
30 Correct 7 ms 6356 KB Output is correct
31 Correct 3 ms 4180 KB Output is correct
32 Correct 3 ms 4208 KB Output is correct
33 Correct 3 ms 4180 KB Output is correct
34 Correct 3 ms 4180 KB Output is correct
35 Correct 2 ms 4180 KB Output is correct
36 Correct 76 ms 38460 KB Output is correct
37 Correct 3 ms 4180 KB Output is correct
38 Correct 92 ms 38020 KB Output is correct
39 Correct 70 ms 37336 KB Output is correct
40 Correct 80 ms 38604 KB Output is correct
41 Correct 80 ms 39000 KB Output is correct
42 Correct 101 ms 32264 KB Output is correct
43 Correct 135 ms 27368 KB Output is correct
44 Correct 119 ms 26696 KB Output is correct
45 Correct 120 ms 26692 KB Output is correct
46 Correct 128 ms 26776 KB Output is correct
47 Correct 89 ms 32460 KB Output is correct
48 Correct 94 ms 32380 KB Output is correct
49 Correct 107 ms 32436 KB Output is correct
50 Correct 121 ms 32460 KB Output is correct
51 Correct 74 ms 38764 KB Output is correct
52 Correct 71 ms 38596 KB Output is correct
53 Correct 85 ms 26052 KB Output is correct
54 Correct 101 ms 26052 KB Output is correct
55 Correct 107 ms 26660 KB Output is correct
56 Correct 109 ms 26688 KB Output is correct
57 Correct 111 ms 26824 KB Output is correct
58 Correct 127 ms 26828 KB Output is correct
59 Correct 122 ms 26816 KB Output is correct
60 Correct 112 ms 27296 KB Output is correct
61 Correct 96 ms 32672 KB Output is correct
62 Correct 97 ms 32796 KB Output is correct
63 Correct 99 ms 32676 KB Output is correct
64 Correct 99 ms 32588 KB Output is correct
65 Correct 132 ms 26812 KB Output is correct
66 Correct 144 ms 26740 KB Output is correct
67 Correct 123 ms 26700 KB Output is correct
68 Correct 83 ms 25824 KB Output is correct
69 Correct 84 ms 25832 KB Output is correct
70 Correct 102 ms 33028 KB Output is correct
71 Correct 100 ms 32176 KB Output is correct
72 Correct 3 ms 4216 KB Output is correct
73 Correct 8 ms 6356 KB Output is correct
74 Correct 7 ms 6356 KB Output is correct
75 Correct 2 ms 4180 KB Output is correct
76 Correct 2 ms 4180 KB Output is correct
77 Correct 8 ms 7124 KB Output is correct
78 Correct 8 ms 6484 KB Output is correct
79 Correct 7 ms 6356 KB Output is correct
80 Correct 7 ms 6420 KB Output is correct
81 Correct 3 ms 4180 KB Output is correct
82 Correct 2 ms 4180 KB Output is correct
83 Correct 4 ms 4180 KB Output is correct
84 Correct 3 ms 4180 KB Output is correct
85 Correct 2 ms 4180 KB Output is correct
86 Correct 27 ms 6752 KB Output is correct
87 Correct 28 ms 6844 KB Output is correct
88 Correct 31 ms 6924 KB Output is correct
89 Correct 9 ms 6996 KB Output is correct
90 Correct 8 ms 6484 KB Output is correct
91 Correct 43 ms 6984 KB Output is correct
92 Correct 40 ms 6812 KB Output is correct
93 Correct 3 ms 4180 KB Output is correct
94 Correct 74 ms 38568 KB Output is correct
95 Correct 70 ms 38084 KB Output is correct
96 Correct 72 ms 37340 KB Output is correct
97 Correct 71 ms 38504 KB Output is correct
98 Correct 81 ms 38976 KB Output is correct
99 Correct 118 ms 26808 KB Output is correct
100 Correct 108 ms 26804 KB Output is correct
101 Correct 125 ms 26844 KB Output is correct
102 Correct 120 ms 27368 KB Output is correct
103 Correct 88 ms 32308 KB Output is correct
104 Correct 89 ms 32836 KB Output is correct
105 Correct 87 ms 32352 KB Output is correct
106 Correct 108 ms 32664 KB Output is correct
107 Correct 113 ms 32460 KB Output is correct
108 Correct 81 ms 38672 KB Output is correct
109 Correct 76 ms 38596 KB Output is correct
110 Correct 93 ms 26012 KB Output is correct
111 Correct 86 ms 26056 KB Output is correct
112 Correct 106 ms 26684 KB Output is correct
113 Correct 124 ms 26632 KB Output is correct