#include<bits/stdc++.h>
using namespace std;
const int MXN = 2e6 + 5;
const int LOG = 20;
int n, D, T, res;
int arr[MXN], L[MXN], val[MXN];
array<int, 2> mx[MXN];
vector<int> adj[MXN];
void dfs(int a, int w)
{
mx[a] = {w, a};
for (int &v : adj[a])
{
dfs(v, w + 1);
mx[a] = max(mx[a], mx[v]);
}
val[mx[a][1]]++;
}
void _()
{
cin >> n >> D >> T;
res = n;
for (int i = 1; i <= n; i++) cin >> arr[i];
{
vector<int> v;
for (int i = 1; i <= n; i++)
{
while (!v.empty() && arr[i] - i <= arr[v.back()] - v.back()) v.pop_back();
v.push_back(i);
while (!v.empty() && arr[v.back()] - v.back() > T - i) v.pop_back();
if (!v.empty()) L[i] = v.back();
}
}
vector<int> v;
for (int i = 1; i <= n; i++)
{
if (!L[i])
{
res--;
continue;
}
if (L[i] == i) continue;
while (!v.empty() && L[v.back()] >= L[i])
{
adj[i].push_back(v.back());
v.pop_back();
}
v.push_back(i);
}
for (int &i : v) dfs(i, 0);
sort(val + 1, val + n + 1, greater<int>());
for (int i = 1; i <= D; i++) res -= val[i];
cout << res << '\n';
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
// cin >> t;
while (t--) _();
}
