#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<pii> vii;
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail>
void dbg_out(Head H, Tail... T) { cerr << ' ' << H; dbg_out(T...); }
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "): ", dbg_out(__VA_ARGS__)
template <typename T>
inline T gcd(T a, T b) { while (b != 0) swap(b, a %= b); return a; }
const int N = 200000 + 10;
vi adj[N];
int n, d;
pii dp[N];
void dfs(int u, int p = -1) {
dp[u] = {1, 0};
auto &here = dp[u] ;
for(int v : adj[u]) if(v != p) {
dfs(v, u);
here.first += dp[v].first;
if(dp[v].second + here.second + 1 < d) {
here.first--;
here.second = max(here.second, dp[v].second + 1);
}else here.second = min(here.second, dp[v].second + 1);
}
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n >> d;
for(int i = 1; i < n; i++) {
int p; cin >> p;
adj[p].push_back(i);
adj[i].push_back(p);
}
dfs(0);
cout << dp[0].first << "\n";
}
