#include <bits/stdc++.h>
using namespace std;
#define sped ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pb push_back
#define s second
#define f first
const int N = 5e5 + 10;
void okok(){
int n,m;
cin >> n >> m;
int a[n + 1];
for(int i = 0;i < n;i++){
cin >> a[i];
}
int mx = n;
for(int i = 0;i < (1<<n);i++){
int cur = 0;
for(int j = 0;j < n;j++){
if( (i & (1<<j)) != 0 ){
cur+=m;
}
else{
if(cur + m < a[i]){
cur = -1;
break;
}
else{
cur = a[i];
}
}
}
if(cur == -1){
continue;
}
mx = min(mx,__builtin_popcount(i));
}
}
signed main() {
//freopen("bank.in", "r", stdin) ;
//freopen("bank.out", "w", stdout);
sped
int tt = 1;
//cin >> tt;
while(tt--){
okok();
cout << '\n';
}
}
