#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;
pii dfs(int v,int p,vvector<int> &G,int k) {
int ans=0,dep=INF;
for (int i:G[v]) {
if (i==p) continue;
auto [now,nd]=dfs(i,v,G,k);
if (nd+dep>=k) {
ans+=now;
dep = min(dep,nd);
} else {
ans+=now-1;
dep=max(dep,nd);
}
}
if (dep==INF or dep>=k) {
ans++;
dep=0;
}
// cout<<v<<" "<<ans<<" "<<dep<<" v ans dep\n";
return {ans,dep+1};
}
int main() {
speed;
int n,d;
cin>>n>>d;
vvector<int> G(n);
for (int i=1;i<n;i++) {
int x;
cin>>x;
G[x].push_back(i);
G[i].push_back(x);
}
auto [ans,dp] = dfs(0,-1,G,d);
cout<<ans<<"\n";
return 0;
}
