#include <bits/stdc++.h>
#define ll int64_t
#define ld long double
using namespace std;
//
const int maxn =2e5+5;
const int mod = 1e9+7; // 998244353,1610612741
const ll inf = 1e18;
const ld pi = atan(1.0L)*4;
int n,d,res,mn[maxn];
vector<int> g[maxn];
void dfs(int u) {
for (auto v:g[u]) {
dfs(v);
if (++mn[v]+mn[u]<d) res--,mn[u]=max(mn[u],mn[v]);
else mn[u]=min(mn[u],mn[v]);
}
}
int main() {
// freopen("../input.inp","r",stdin);
// freopen("output.out","w",stdout);
ios::sync_with_stdio(false);
cin.tie(nullptr);
clock_t start,end;
start=clock();
cin >>n>>d;
res=n;
for (int i=2;i<=n;i++) {
int p;
cin>>p;
g[p+1].push_back(i);
}
dfs(1);
cout <<res;
end=clock();
ld dur=(ld)(end-start)/(ld)(CLOCKS_PER_SEC)*(1000.0L);
cerr<<dur<<'\n';
return 0;
}
