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Submission #378168

# Submission time Handle Problem Language Result Execution time Memory
378168 2021-03-16T05:57:33 Z YJU Cat in a tree (BOI17_catinatree) C++14
100 / 100
 139 ms 24616 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector,Ofast")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll N=2e5+5;
const ll MOD=1e9+7;
const ld pi=acos(-1);
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

vector<ll> v[N];
ll n,x,d;

pll DFS(ll nd,ll pa){
	vector<pll> lis;
    for(auto i:v[nd]){
		if(i==pa)continue;
		lis.pb(DFS(i,nd));
    }
    if(SZ(lis)==0){return mp(1,1);}
    sort(lis.begin(),lis.end(),greater<pll>());
    ll pos=0;
    for(int i=1;i<SZ(lis);i++){
		if(lis[i-1].X+lis[i].X>=d)pos=i;
    }
    ll ret=0;
    REP(i,SZ(lis))ret+=lis[i].Y-1;
    ret+=pos+1;
    if(lis[pos].X>=d)return mp(1,ret+1);
    else return mp(lis[pos].X+1,ret);
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>d;
    for(int i=1;i<n;i++)cin>>x,v[x].pb(i),v[i].pb(x);
    cout<<DFS(0,-1).Y<<"\n";
	return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5100 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 3 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 5 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 3 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 3 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 3 ms 4972 KB Output is correct
16 Correct 3 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5100 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 3 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 5 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 3 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 3 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 3 ms 4972 KB Output is correct
16 Correct 3 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 5228 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 4 ms 5100 KB Output is correct
25 Correct 4 ms 5100 KB Output is correct
26 Correct 4 ms 5100 KB Output is correct
27 Correct 4 ms 5100 KB Output is correct
28 Correct 4 ms 5100 KB Output is correct
29 Correct 5 ms 5100 KB Output is correct
30 Correct 4 ms 5100 KB Output is correct
31 Correct 4 ms 5100 KB Output is correct
32 Correct 4 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5100 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 4 ms 5100 KB Output is correct
37 Correct 4 ms 5100 KB Output is correct
38 Correct 4 ms 5100 KB Output is correct
39 Correct 4 ms 5100 KB Output is correct
40 Correct 5 ms 5356 KB Output is correct

Subtask #3
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5100 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 3 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 5 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 3 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 3 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 3 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 3 ms 4972 KB Output is correct
16 Correct 3 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 5228 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 4 ms 5100 KB Output is correct
24 Correct 4 ms 5100 KB Output is correct
25 Correct 4 ms 5100 KB Output is correct
26 Correct 4 ms 5100 KB Output is correct
27 Correct 4 ms 5100 KB Output is correct
28 Correct 4 ms 5100 KB Output is correct
29 Correct 5 ms 5100 KB Output is correct
30 Correct 4 ms 5100 KB Output is correct
31 Correct 4 ms 5100 KB Output is correct
32 Correct 4 ms 5100 KB Output is correct
33 Correct 4 ms 5100 KB Output is correct
34 Correct 4 ms 5100 KB Output is correct
35 Correct 4 ms 5100 KB Output is correct
36 Correct 4 ms 5100 KB Output is correct
37 Correct 4 ms 5100 KB Output is correct
38 Correct 4 ms 5100 KB Output is correct
39 Correct 4 ms 5100 KB Output is correct
40 Correct 5 ms 5356 KB Output is correct
41 Correct 67 ms 13924 KB Output is correct
42 Correct 43 ms 9324 KB Output is correct
43 Correct 43 ms 9324 KB Output is correct
44 Correct 47 ms 9324 KB Output is correct
45 Correct 53 ms 9324 KB Output is correct
46 Correct 125 ms 13676 KB Output is correct
47 Correct 130 ms 13804 KB Output is correct
48 Correct 139 ms 13676 KB Output is correct
49 Correct 134 ms 13804 KB Output is correct
50 Correct 29 ms 9580 KB Output is correct
51 Correct 29 ms 9708 KB Output is correct
52 Correct 28 ms 9580 KB Output is correct
53 Correct 62 ms 14188 KB Output is correct
54 Correct 65 ms 14316 KB Output is correct
55 Correct 64 ms 14188 KB Output is correct
56 Correct 4 ms 5228 KB Output is correct
57 Correct 10 ms 8044 KB Output is correct
58 Correct 37 ms 18796 KB Output is correct
59 Correct 94 ms 24616 KB Output is correct
60 Correct 63 ms 14060 KB Output is correct
61 Correct 85 ms 13164 KB Output is correct