/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
#define pb push_back
#define all(x) x.begin(), x.end()
const int N = 2e6+10, M = 5e3, MOD = 1e9+7;
int n, d, a[N], T, dp[M][M], pref[N], suf[N];
void solve(){
cin >> n >> d >> T;
for(int i = 1; i <= n; ++i) cin >> a[i];
pref[0] = 0, suf[n + 1] = 0;
int cur = MOD;
for(int i = 1; i <= n; ++i){
pref[i] = pref[i - 1];
if(min(a[i], cur) < T) pref[i]++;
cur = min(a[i] + 1, cur + 1);
}
cur = MOD;
for(int i = n; i >= 1; --i){
suf[i] = suf[i + 1];
if(min(a[i], cur) < T) suf[i]++;
cur = min(a[i] + 1, cur + 1);
}
int ans = n;
for(int i = 0; i <= n; ++i){
ans = min(ans, pref[i] + suf[i + 1]);
}
cout << ans;
}
int main(){
cin.tie(0); ios::sync_with_stdio(0);
solve();
return 0;
}
