Submission #1166905

#	Time	Username	Problem	Language	Result	Execution time	Memory
1166905		tch1cherin	Cat in a tree (BOI17_catinatree)	C++17	51 / 100	91 ms	88648 KiB

catinatree

#include<bits/stdc++.h>
using namespace std;
int N,D,A,P,X[1<<17]{},i=1;
deque<int>G[1<<17];
main(){
for(cin>>N>>D;i<N;)cin>>P,G[P].push_back(i++);
for(A=i--;~i;--i)for(int j:G[i])
if(++X[j]+X[i]<D)X[i]=max(X[i],X[j]),--A;
else X[i]=min(X[i],X[j]);
cout<<A;
}

Compilation message (stderr)

catinatree.cpp:5:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    5 | main(){
      | ^~~~

• Subtask 1: 11 / 11
• Subtask 2: 40 / 40
• Subtask 3: 0 / 49