oj.uz

Submission #945784

# Submission time Handle Problem Language Result Execution time Memory
945784 2024-03-14T07:41:33 Z noyancanturk Railway (BOI17_railway) C++17
100 / 100
 60 ms 19308 KB 
#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
    const int lim=1e5+100;
#else
    const int lim=1e5+3;
#endif

const int lglim=17;
    
#include "bits/stdc++.h"
using namespace std;
    
//#define int int64_t
#define pb push_back
    
const int mod=998244353;
//const int mod=(1ll<<61)-1;

using pii=pair<int,int>;

int n,m,k;
int tin[lim],tout[lim],dep[lim],tt=0;
int lift[lglim][lim];
vector<pii>v[lim];
int pare[lim];

inline void tour(int node,int par){
    tin[node]=tt++;
    dep[node]=dep[par]-1;
    lift[0][node]=par;
    int i=1;
    while(i<lglim&&(lift[i][node]=lift[i-1][lift[i-1][node]]))i++;
    for(auto [j,c]:v[node]){
        if(j^par){
            pare[j]=c;
            tour(j,node);
        }
    }
    tout[node]=tt-1;
}

int lgll[lim];

inline int lca(int x,int y){
    if(dep[y]<dep[x])swap(x,y);
    int dif=dep[y]-dep[x];
    while(dif){
        int lll=lgll[dif&-dif];
        dif-=1<<lll;
        x=lift[lll][x];
    }
    if(x==y)return x;
    for(int i=lgll[-dep[x]];0<=i;i--){
        if(lift[i][x]^lift[i][y]){
            x=lift[i][x];
            y=lift[i][y];
        }
    }
    return lift[0][x];
}

int val[lim];
bool can[lim];
vector<int>ans;

inline int dfs(int node,int par){
    for(auto [j,c]:v[node]){
        if(j^par){
            val[node]+=dfs(j,node);
        }
    }
    if(2*k<=val[node]){
        can[pare[node]]=1;
    }
    return val[node];
}

inline void solve(){
    lgll[1]=0;
    for(int i=2;i<lim;i++){
        lgll[i]=lgll[i/2]+1;
    }
    cin>>n>>m>>k;
    for(int i=1;i<=n-1;i++){
        int x,y;
        cin>>x>>y;
        v[x].pb({y,i});
        v[y].pb({x,i});
    }
    tour(1,0);
    int inds[n+1];
    for(int r=0;r<m;r++){
        int s;
        cin>>s;
        for(int i=0;i<s;i++){
            cin>>inds[i];
        }
        sort(inds,inds+s,[&](int i,int j) -> bool {
            return tin[i]<tin[j];
        });
        inds[s]=inds[0];
        for(int i=0;i<s;i++){
            val[inds[i]]++;
            val[inds[i+1]]++;
            val[lca(inds[i],inds[i+1])]-=2;
        }
    }
    dfs(1,0);
    int cnt=0;
    for(int i=0;i<n;i++){
        if(can[i])cnt++;
    }
    cout<<cnt<<"\n";
    for(int i=0;i<n;i++)if(can[i])cout<<i<<" ";
}
    
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
#ifdef Local  
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
#else

#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 5 ms 7016 KB Output is correct
3 Correct 4 ms 7004 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 4 ms 9304 KB Output is correct
7 Correct 5 ms 9052 KB Output is correct
8 Correct 3 ms 7004 KB Output is correct
9 Correct 3 ms 7248 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 5 ms 7016 KB Output is correct
3 Correct 4 ms 7004 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 4 ms 9304 KB Output is correct
7 Correct 5 ms 9052 KB Output is correct
8 Correct 3 ms 7004 KB Output is correct
9 Correct 3 ms 7248 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 12 ms 7004 KB Output is correct
16 Correct 12 ms 7004 KB Output is correct
17 Correct 17 ms 7004 KB Output is correct
18 Correct 5 ms 9308 KB Output is correct
19 Correct 5 ms 9308 KB Output is correct
20 Correct 10 ms 5388 KB Output is correct
21 Correct 12 ms 7004 KB Output is correct
22 Correct 1 ms 6492 KB Output is correct
23 Correct 4 ms 7028 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 4 ms 9308 KB Output is correct
28 Correct 4 ms 9052 KB Output is correct
29 Correct 3 ms 7004 KB Output is correct
30 Correct 3 ms 7004 KB Output is correct
31 Correct 1 ms 6492 KB Output is correct
32 Correct 2 ms 6588 KB Output is correct
33 Correct 1 ms 6492 KB Output is correct
34 Correct 1 ms 6492 KB Output is correct
35 Correct 1 ms 6488 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 18848 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Correct 49 ms 18520 KB Output is correct
4 Correct 47 ms 18264 KB Output is correct
5 Correct 42 ms 18936 KB Output is correct
6 Correct 44 ms 18964 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 17236 KB Output is correct
2 Correct 47 ms 14932 KB Output is correct
3 Correct 40 ms 11864 KB Output is correct
4 Correct 46 ms 11976 KB Output is correct
5 Correct 39 ms 11980 KB Output is correct
6 Correct 41 ms 17236 KB Output is correct
7 Correct 43 ms 17128 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 17236 KB Output is correct
2 Correct 47 ms 14932 KB Output is correct
3 Correct 40 ms 11864 KB Output is correct
4 Correct 46 ms 11976 KB Output is correct
5 Correct 39 ms 11980 KB Output is correct
6 Correct 41 ms 17236 KB Output is correct
7 Correct 43 ms 17128 KB Output is correct
8 Correct 57 ms 17236 KB Output is correct
9 Correct 44 ms 17232 KB Output is correct
10 Correct 40 ms 19048 KB Output is correct
11 Correct 40 ms 19028 KB Output is correct
12 Correct 30 ms 12124 KB Output is correct
13 Correct 29 ms 12120 KB Output is correct
14 Correct 44 ms 11876 KB Output is correct
15 Correct 41 ms 11864 KB Output is correct
16 Correct 41 ms 11864 KB Output is correct
17 Correct 40 ms 11752 KB Output is correct
18 Correct 45 ms 11856 KB Output is correct
19 Correct 60 ms 14684 KB Output is correct
20 Correct 42 ms 17388 KB Output is correct
21 Correct 44 ms 17492 KB Output is correct
22 Correct 53 ms 17232 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 5 ms 7016 KB Output is correct
3 Correct 4 ms 7004 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 4 ms 9304 KB Output is correct
7 Correct 5 ms 9052 KB Output is correct
8 Correct 3 ms 7004 KB Output is correct
9 Correct 3 ms 7248 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 12 ms 7004 KB Output is correct
16 Correct 12 ms 7004 KB Output is correct
17 Correct 17 ms 7004 KB Output is correct
18 Correct 5 ms 9308 KB Output is correct
19 Correct 5 ms 9308 KB Output is correct
20 Correct 10 ms 5388 KB Output is correct
21 Correct 12 ms 7004 KB Output is correct
22 Correct 1 ms 6492 KB Output is correct
23 Correct 4 ms 7028 KB Output is correct
24 Correct 4 ms 7004 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 4 ms 9308 KB Output is correct
28 Correct 4 ms 9052 KB Output is correct
29 Correct 3 ms 7004 KB Output is correct
30 Correct 3 ms 7004 KB Output is correct
31 Correct 1 ms 6492 KB Output is correct
32 Correct 2 ms 6588 KB Output is correct
33 Correct 1 ms 6492 KB Output is correct
34 Correct 1 ms 6492 KB Output is correct
35 Correct 1 ms 6488 KB Output is correct
36 Correct 50 ms 18848 KB Output is correct
37 Correct 2 ms 6488 KB Output is correct
38 Correct 49 ms 18520 KB Output is correct
39 Correct 47 ms 18264 KB Output is correct
40 Correct 42 ms 18936 KB Output is correct
41 Correct 44 ms 18964 KB Output is correct
42 Correct 42 ms 17236 KB Output is correct
43 Correct 47 ms 14932 KB Output is correct
44 Correct 40 ms 11864 KB Output is correct
45 Correct 46 ms 11976 KB Output is correct
46 Correct 39 ms 11980 KB Output is correct
47 Correct 41 ms 17236 KB Output is correct
48 Correct 43 ms 17128 KB Output is correct
49 Correct 57 ms 17236 KB Output is correct
50 Correct 44 ms 17232 KB Output is correct
51 Correct 40 ms 19048 KB Output is correct
52 Correct 40 ms 19028 KB Output is correct
53 Correct 30 ms 12124 KB Output is correct
54 Correct 29 ms 12120 KB Output is correct
55 Correct 44 ms 11876 KB Output is correct
56 Correct 41 ms 11864 KB Output is correct
57 Correct 41 ms 11864 KB Output is correct
58 Correct 40 ms 11752 KB Output is correct
59 Correct 45 ms 11856 KB Output is correct
60 Correct 60 ms 14684 KB Output is correct
61 Correct 42 ms 17388 KB Output is correct
62 Correct 44 ms 17492 KB Output is correct
63 Correct 53 ms 17232 KB Output is correct
64 Correct 46 ms 17236 KB Output is correct
65 Correct 44 ms 11868 KB Output is correct
66 Correct 40 ms 11812 KB Output is correct
67 Correct 39 ms 11980 KB Output is correct
68 Correct 26 ms 12212 KB Output is correct
69 Correct 26 ms 12124 KB Output is correct
70 Correct 47 ms 17424 KB Output is correct
71 Correct 43 ms 17236 KB Output is correct
72 Correct 1 ms 6488 KB Output is correct
73 Correct 4 ms 7004 KB Output is correct
74 Correct 4 ms 7004 KB Output is correct
75 Correct 1 ms 6492 KB Output is correct
76 Correct 1 ms 6492 KB Output is correct
77 Correct 4 ms 9464 KB Output is correct
78 Correct 4 ms 9052 KB Output is correct
79 Correct 3 ms 7004 KB Output is correct
80 Correct 3 ms 7004 KB Output is correct
81 Correct 2 ms 6492 KB Output is correct
82 Correct 1 ms 6492 KB Output is correct
83 Correct 1 ms 6492 KB Output is correct
84 Correct 2 ms 6492 KB Output is correct
85 Correct 2 ms 6492 KB Output is correct
86 Correct 12 ms 7004 KB Output is correct
87 Correct 12 ms 7004 KB Output is correct
88 Correct 12 ms 7004 KB Output is correct
89 Correct 5 ms 9304 KB Output is correct
90 Correct 4 ms 9052 KB Output is correct
91 Correct 9 ms 5212 KB Output is correct
92 Correct 11 ms 7244 KB Output is correct
93 Correct 1 ms 6492 KB Output is correct
94 Correct 53 ms 18800 KB Output is correct
95 Correct 50 ms 18684 KB Output is correct
96 Correct 43 ms 18268 KB Output is correct
97 Correct 45 ms 18772 KB Output is correct
98 Correct 45 ms 19036 KB Output is correct
99 Correct 39 ms 11860 KB Output is correct
100 Correct 43 ms 11864 KB Output is correct
101 Correct 39 ms 11856 KB Output is correct
102 Correct 53 ms 15188 KB Output is correct
103 Correct 41 ms 17244 KB Output is correct
104 Correct 43 ms 17488 KB Output is correct
105 Correct 41 ms 17244 KB Output is correct
106 Correct 47 ms 17368 KB Output is correct
107 Correct 44 ms 17116 KB Output is correct
108 Correct 40 ms 19032 KB Output is correct
109 Correct 41 ms 19308 KB Output is correct
110 Correct 28 ms 12128 KB Output is correct
111 Correct 30 ms 12124 KB Output is correct
112 Correct 47 ms 11860 KB Output is correct
113 Correct 39 ms 11868 KB Output is correct