#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define AC "test"
#define foru(i, l, r) for (int i = (l); i <= (r); i++)
#define ford(i, l, r) for (int i = (l); i >= (r); i--)
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vii;
typedef vector<ll> vll;
const ll inf = 1e9 + 7;
const ll linf = 1e18 + 7;
const int mod = 1e9 + 7;
const int maxn = 1e6 + 7;
const int base = 31;
void fastIO(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
}
ll mul(ll a, ll b){
a%=mod;
ll res = 0;
while (b){
if (b%2) res = (res + a)%mod;
a = (a + a)%mod;
b/=2;
}
return res;
}
ll Pow(ll a, ll b){
ll ans = 1;
while (b){
if (b % 2) ans = mul(ans, a);
a = mul(a, a);
b/=2;
}
return ans;
}
ll n, k, a[maxn], res, cnt, cur, get2, get1;
vii p, pos;
void solve(){
cin >> n >> k;
foru(i, 1, n){
cin >> a[i];
p.pb(a[i]);
}
sort(p.begin(), p.end());
p.erase(unique(p.begin(), p.end()), p.end());
foru(i, 1, n){
a[i] = lower_bound(p.begin(), p.end(), a[i]) - p.begin();
a[i] = a[i] / k + 1;
}
res = 0;
pos.resize(n + 5);
pos[1] = n + 2;
foru(i, 1, n){
cur = upper_bound(pos.begin(), pos.begin() + res + 1, a[i]) - pos.begin();
pos[cur] = a[i];
res = max(res, cur);
}
cout << n - res;
}
int main(){
fastIO();
if (fopen(AC".inp", "r")){
freopen(AC".inp", "r", stdin);
freopen(AC".out", "w", stdout);
}
solve();
}
