//#include <bits/stdc++.h>
#include <random>
#include "set"
#include <iostream>
#include "vector"
#include "deque"
#include "climits"
#include "algorithm"
#include "stack"
#include "map"
#include "unordered_set"
#include "bitset"
#include "unordered_map"
#include "stack"
#include "queue"
using namespace std;
/*
====================================================================================================
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====================================================================================================
*/
using ll = long long;
using ull = unsigned long long;
#define MOD 1000000007
#define endl '\n'
#define pb(v,i) (v).push_back(i)
#define vll vector<ll>
#define pll pair<ll,ll>
#define _ << ' ' <<
#define clearvis for (int i=0; i<maxn;visited[i++]=false)
//__int128 fpow(ll base,ll exp){__int128 result=1;while (exp){if (exp%2==1) result*=base;exp/=2;base*=base;}return result;}
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
*/
ll fastpow(ll base, ll exp) {
ll res = 1;
while (exp) {
if (exp & 1)
res *= base;
base *= base;
res %= MOD;
base %= MOD;
exp >>= 1;
}
return res;
}
ll n, d;
vll edges[200005];
ll depth[200005];
vll byd[200005];
ll rmvd[200005];
void rmv(ll node, ll dist = d){
if (rmvd[node] >= dist) return;
rmvd[node] = dist;
if (dist == 1) return;
for (ll nd : edges[node]){
rmv(nd, dist-1);
}
}
void solve() {
// cout << fixed << setprecision(6);
ll ans = 0;
cin >> n >> d;
pb(byd[0], 0);
for (int i=1; i<n; i++){
ll x; cin >> x;
depth[i] = depth[x] + 1;
pb(byd[depth[i]], i);
pb(edges[i],x);
pb(edges[x], i);
}
for (int dep = n+2; dep >=0; dep--){
for (ll node : byd[dep]){
if (rmvd[node]) continue;
rmv(node);
ans++;
}
}
cout << ans;
}
signed main() {
ios::sync_with_stdio(false);cin.tie(nullptr);
//freopen("berries.in","r",stdin);
//freopen("berries.out","w",stdout);
ll t=1;
//cin >> t;
for (int i=1; i<=t; i++){
//cout << "Case #" << i << ": ";
solve();
cout << endl;
}
return 0; // ok
}
