#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 5;
const int inf = 1e9;
vector<int> g[N];
int k;
pair<int, int> Dfs(int s) {
vector<int> v;
v.push_back(0);
int ans = 1;
for (int u : g[s]) {
auto x = Dfs(u);
ans += x.first;
v.push_back(x.second);
}
sort(v.rbegin(), v.rend());
while (v.size() >= 2 && v.back() + v[v.size() - 2] < k) {
ans -= 1;
v.pop_back();
}
return {ans, v.back() + 1};
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n;
cin >> n >> k;
for (int i = 1; i < n; i++) {
int p; cin >> p;
g[p].push_back(i);
}
cout << Dfs(0).first << en;
return 0;
}
