#include <bits/stdc++.h>
using namespace std;
const int MXN = 2e5+5, LOG = 17;
int n, d, sz[MXN];
vector<int> g[MXN];
bool dead[MXN];
int get_sz(int v, int p=-1) {
sz[v] = 1;
for(int u : g[v])
if(!dead[u] && u!=p)
sz[v] += get_sz(u, v);
return sz[v];
}
int centroid(int v, int N, int p=-1) {
for(int u : g[v])
if(!dead[u] && u!=p && 2*sz[u]>N)
return centroid(u, N, v);
return v;
}
int h[MXN], par[MXN], dp[LOG][MXN], val[MXN];
void dfs(int id, int v, int p=-1) {
for(int u : g[v])
if(!dead[u] && u!=p)
dp[id][u] = dp[id][v]+1,
dfs(id, u, v);
}
void decompose(int v, int cur=0, int p=-1) {
dead[v = centroid(v, get_sz(v))] = 1;
h[v] = cur;
par[v] = p;
val[v] = 1e9;
dp[h[v]][v] = 0;
dfs(h[v], v);
for(int u : g[v])
if(!dead[u])
decompose(u, cur+1, v);
}
void upd(int v) {
for(int u=v; u!=-1; u=par[u])
val[u] = min(val[u], dp[h[u]][v]);
}
int get(int v) {
int res = 1e9;
for(int u=v; u!=-1; u=par[u])
res = min(res, dp[h[u]][v]+val[u]);
return res;
}
vector<int> vec;
void DFS(int v, int p=-1) {
for(int u : g[v])
if(u!=p)
DFS(u, v);
vec.push_back(v);
}
int32_t main() {
cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);
cin >> n >> d;
for(int i=1; i<n; i++) {
int p;
cin >> p;
g[p].push_back(i);
g[i].push_back(p);
}
decompose(0);
DFS(0);
int ans = 0;
for(int v : vec)
if(get(v)>=d) {
ans++;
upd(v);
}
cout << ans << '\n';
return 0;
}
