#include <bits/stdc++.h>
using namespace std;
#define int long long
#define OYY LLONG_MAX
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define fi first
#define se second
#define FOR for(int i=1;i<=n;i++)
#define mid (start+end)/2
#define pb push_back
#define lim 1505
typedef long long lo;
int n,d;
vector<int> v[lim];
int dp[lim][lim];
inline void f(int node){
dp[node][0]=1;
for(auto go:v[node]){
f(go);
dp[node][0]+=dp[go][d-1];
}
for(int j=1;j<=d;j++){
int tot=0,tot2=0,maxi=0;
for(auto go:v[node]){
tot+=dp[go][d-j-1];
tot2+=dp[go][j-1];
maxi=max(maxi,dp[go][j-1]);
}
//if(node==2)cout<<"k"<<j<<" "<<tot<<endl;
for(auto go:v[node]){
tot-=dp[go][d-j-1];
tot+=dp[go][j-1];
//if(node==2)cout<<node<<" "<<go<<" -> "<<tot<<" "<<dp[node][j]<<" "<<j<<endl;
if(j<=d-j)dp[node][j]=max(dp[node][j],tot);
tot-=dp[go][j-1];
tot+=dp[go][d-j-1];
}
//if(node==2 && j==3)cout<<maxi<<" "<<dp[node][j]<<" "<<tot2<<endl;
if(j>=d-j){
dp[node][j]=max(dp[node][j],tot2);
//if(node==1)cout<<node<<" "<<j<<" "<<d-j<<" "<<tot2<<endl;
}
if(j<=d-j){
dp[node][j]=max(dp[node][j],maxi);
}
}
for(int j=d;j>=0;j--){
dp[node][j]=max(dp[node][j],dp[node][j+1]);
}
}
int32_t main(){
faster
cin>>n>>d;
d=min(d,n+2);
FOR{
if(i==1)continue;
int x;cin>>x;
x++;
v[x].pb(i);
}
f(1);
//~ FOR{
//~ cout<<i<<" ";
//~ for(int j=0;j<=d;j++){
//~ cout<<dp[i][j]<<" ";
//~ }
//~ cout<<'\n';
//~ }
int cev=0;
FOR{
for(int j=0;j<=d;j++){
cev=max(cev,dp[i][j]);
}
}
cout<<cev<<'\n';
return 0;
}
