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Submission #256652

# Submission time Handle Problem Language Result Execution time Memory
256652 2020-08-03T05:04:28 Z nandonathaniel Tax Evasion (LMIO19_mokesciai) C++14
100 / 100
 362 ms 46944 KB 
#include<bits/stdc++.h>
using namespace std;
const int MAXN=200005,LOG=18;

vector<int> adj[MAXN],que[MAXN];
int pa[LOG][MAXN],depth[MAXN],ST[MAXN],EN[MAXN],preorder[MAXN],idx;
bool coin[MAXN];

int anc(int u,int naik){
	for(int i=LOG-1;i>=0;i--){
		if(naik&(1<<i))u=pa[i][u];
	}
	return u;
}

void dfs(int now){
	idx++;
	ST[now]=idx;
	preorder[idx]=now;
	for(auto nxt : adj[now])dfs(nxt);	
	EN[now]=idx;
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int n,m,p,a;
	cin >> n >> m;
	for(int i=2;i<=n;i++){
		cin >> p;
		adj[p].push_back(i);
		depth[i]=depth[p]+1;
		pa[0][i]=p;
		for(int j=1;j<LOG;j++)pa[j][i]=pa[j-1][pa[j-1][i]];
	}
	dfs(1);
	for(int i=1;i<=m;i++){
		cin >> a;
		coin[a]=true;
	}
	if(coin[1]){
		cout << 1 << '\n';
		return 0;
	}
	for(int i=1;i<=n;i++){
		if(coin[i]){
			int atas=anc(i,(depth[i]-1)/2);
			que[ST[atas]].push_back(EN[atas]+1);
		}
	}
	int ki=0,ka=n,res;
	while(ki<=ka){
		int mid=(ki+ka)/2;
		priority_queue<int,vector<int>,greater<int> > PQ;
		bool yes=true;
		for(int i=1;i<=n;i++){
			for(auto isi : que[i])PQ.push(isi);
			if(!PQ.empty() && depth[preorder[i]]>=mid){
				if(PQ.top()<=i)yes=false;
				PQ.pop();
			}
		}
		if(yes && PQ.empty()){
			res=mid;
			ki=mid+1;
		}
		else ka=mid-1;
	}
	cout << res+1 << '\n';
	return 0;
}

Compilation message

mokesciai.cpp: In function 'int main()':
mokesciai.cpp:68:19: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << res+1 << '\n';
                   ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9856 KB Output is correct
2 Correct 6 ms 9856 KB Output is correct
3 Correct 9 ms 10752 KB Output is correct
4 Correct 11 ms 10752 KB Output is correct
5 Correct 10 ms 10752 KB Output is correct
6 Correct 71 ms 40696 KB Output is correct
7 Correct 69 ms 40696 KB Output is correct
8 Correct 9 ms 10624 KB Output is correct
9 Correct 205 ms 45936 KB Output is correct
10 Correct 221 ms 46944 KB Output is correct
11 Correct 147 ms 43964 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9856 KB Output is correct
2 Correct 9 ms 10496 KB Output is correct
3 Correct 7 ms 10496 KB Output is correct
4 Correct 9 ms 10368 KB Output is correct
5 Correct 7 ms 10496 KB Output is correct
6 Correct 9 ms 10368 KB Output is correct
7 Correct 71 ms 40696 KB Output is correct
8 Correct 69 ms 40696 KB Output is correct
9 Correct 9 ms 10624 KB Output is correct
10 Correct 69 ms 34980 KB Output is correct
11 Correct 65 ms 34852 KB Output is correct
12 Correct 76 ms 30188 KB Output is correct
13 Correct 69 ms 35704 KB Output is correct
14 Correct 64 ms 31224 KB Output is correct
15 Correct 100 ms 30456 KB Output is correct
16 Correct 70 ms 35704 KB Output is correct
17 Correct 143 ms 31356 KB Output is correct
18 Correct 69 ms 38264 KB Output is correct
19 Correct 70 ms 34860 KB Output is correct
20 Correct 74 ms 34680 KB Output is correct
21 Correct 79 ms 34552 KB Output is correct
22 Correct 76 ms 34680 KB Output is correct
23 Correct 78 ms 34296 KB Output is correct
24 Correct 70 ms 34424 KB Output is correct

Subtask #3
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9856 KB Output is correct
2 Correct 6 ms 9856 KB Output is correct
3 Correct 6 ms 9856 KB Output is correct
4 Correct 6 ms 9856 KB Output is correct
5 Correct 6 ms 9856 KB Output is correct
6 Correct 9 ms 10496 KB Output is correct
7 Correct 8 ms 10496 KB Output is correct
8 Correct 8 ms 10496 KB Output is correct
9 Correct 8 ms 10496 KB Output is correct
10 Correct 8 ms 10368 KB Output is correct
11 Correct 10 ms 10496 KB Output is correct
12 Correct 9 ms 10496 KB Output is correct
13 Correct 15 ms 10624 KB Output is correct
14 Correct 9 ms 10496 KB Output is correct
15 Correct 10 ms 10624 KB Output is correct
16 Correct 8 ms 10624 KB Output is correct
17 Correct 10 ms 10496 KB Output is correct
18 Correct 11 ms 10752 KB Output is correct
19 Correct 8 ms 10496 KB Output is correct
20 Correct 8 ms 10368 KB Output is correct
21 Correct 12 ms 10368 KB Output is correct
22 Correct 6 ms 9856 KB Output is correct
23 Correct 6 ms 9856 KB Output is correct
24 Correct 9 ms 10752 KB Output is correct
25 Correct 11 ms 10752 KB Output is correct
26 Correct 10 ms 10752 KB Output is correct
27 Correct 7 ms 9856 KB Output is correct
28 Correct 9 ms 10496 KB Output is correct
29 Correct 7 ms 10496 KB Output is correct
30 Correct 9 ms 10368 KB Output is correct
31 Correct 7 ms 10496 KB Output is correct
32 Correct 9 ms 10368 KB Output is correct
33 Correct 9 ms 10624 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9856 KB Output is correct
2 Correct 6 ms 9856 KB Output is correct
3 Correct 6 ms 9856 KB Output is correct
4 Correct 6 ms 9856 KB Output is correct
5 Correct 6 ms 9856 KB Output is correct
6 Correct 9 ms 10496 KB Output is correct
7 Correct 8 ms 10496 KB Output is correct
8 Correct 8 ms 10496 KB Output is correct
9 Correct 8 ms 10496 KB Output is correct
10 Correct 8 ms 10368 KB Output is correct
11 Correct 10 ms 10496 KB Output is correct
12 Correct 9 ms 10496 KB Output is correct
13 Correct 15 ms 10624 KB Output is correct
14 Correct 9 ms 10496 KB Output is correct
15 Correct 10 ms 10624 KB Output is correct
16 Correct 8 ms 10624 KB Output is correct
17 Correct 10 ms 10496 KB Output is correct
18 Correct 11 ms 10752 KB Output is correct
19 Correct 8 ms 10496 KB Output is correct
20 Correct 8 ms 10368 KB Output is correct
21 Correct 12 ms 10368 KB Output is correct
22 Correct 6 ms 9856 KB Output is correct
23 Correct 6 ms 9856 KB Output is correct
24 Correct 9 ms 10752 KB Output is correct
25 Correct 11 ms 10752 KB Output is correct
26 Correct 10 ms 10752 KB Output is correct
27 Correct 7 ms 9856 KB Output is correct
28 Correct 9 ms 10496 KB Output is correct
29 Correct 7 ms 10496 KB Output is correct
30 Correct 9 ms 10368 KB Output is correct
31 Correct 7 ms 10496 KB Output is correct
32 Correct 9 ms 10368 KB Output is correct
33 Correct 71 ms 40696 KB Output is correct
34 Correct 69 ms 40696 KB Output is correct
35 Correct 9 ms 10624 KB Output is correct
36 Correct 69 ms 34980 KB Output is correct
37 Correct 65 ms 34852 KB Output is correct
38 Correct 76 ms 30188 KB Output is correct
39 Correct 69 ms 35704 KB Output is correct
40 Correct 64 ms 31224 KB Output is correct
41 Correct 100 ms 30456 KB Output is correct
42 Correct 70 ms 35704 KB Output is correct
43 Correct 143 ms 31356 KB Output is correct
44 Correct 69 ms 38264 KB Output is correct
45 Correct 70 ms 34860 KB Output is correct
46 Correct 74 ms 34680 KB Output is correct
47 Correct 79 ms 34552 KB Output is correct
48 Correct 76 ms 34680 KB Output is correct
49 Correct 78 ms 34296 KB Output is correct
50 Correct 70 ms 34424 KB Output is correct
51 Correct 205 ms 45936 KB Output is correct
52 Correct 221 ms 46944 KB Output is correct
53 Correct 147 ms 43964 KB Output is correct
54 Correct 89 ms 35824 KB Output is correct
55 Correct 85 ms 35736 KB Output is correct
56 Correct 152 ms 38088 KB Output is correct
57 Correct 124 ms 33376 KB Output is correct
58 Correct 81 ms 30192 KB Output is correct
59 Correct 258 ms 36132 KB Output is correct
60 Correct 128 ms 33284 KB Output is correct
61 Correct 362 ms 40524 KB Output is correct
62 Correct 187 ms 33600 KB Output is correct
63 Correct 124 ms 40652 KB Output is correct
64 Correct 120 ms 36692 KB Output is correct
65 Correct 104 ms 36048 KB Output is correct
66 Correct 129 ms 37424 KB Output is correct
67 Correct 138 ms 37244 KB Output is correct
68 Correct 114 ms 36524 KB Output is correct
69 Correct 193 ms 39256 KB Output is correct
70 Correct 75 ms 22984 KB Output is correct
71 Correct 127 ms 36020 KB Output is correct