#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e9;
int n,d,root,cnt;
vector<int> con[200005];
int parent[200005],depth[200005];
int insus[200005];
void dfs(int nod, int interzis)
{
insus[nod]=interzis;
for(int adj:con[nod])
{
if(adj==parent[nod])
continue;
parent[adj] = nod;
dfs(adj,interzis-1);
insus[nod] = max(insus[nod], insus[adj]-1);
interzis = max(interzis, insus[adj]-1);
}
if(interzis<=0)
{
cnt++;
insus[nod]=d;
}
}
signed main()
{
ios_base::sync_with_stdio(0);cin.tie(0);
cin>>n>>d;
int u;
for(int i=2;i<=n;i++)
{
cin>>u;
u++;
con[i].push_back(u);
con[u].push_back(i);
}
root=1;
for(int i=1;i<=n;i++)
if((int)con[i].size()>1)
root=i;
//cerr<<root<<" root\n";
dfs(root,-1);
cout<<cnt;
return 0;
}
