//#pragma GCC optimize("O3,unroll-loops,Ofast") //#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt") #include <bits/stdc++.h> // #include <ext/pb_ds/assoc_container.hpp> // #include <ext/pb_ds/tree_policy.hpp> using namespace std; // using namespace __gnu_pbds; #define MAX 10005 #define pb push_back // #define mp make_pair #define int long long #define f first #define s second #define vi vector<int> #define pii pair<int,int> #define si set<int> #define vpii vector<pair<int,int>> const int mod = 1e9+7; const int INF = 1e18; // myMap.begin()->first : key // myMap.begin()->second : value int epow(int a,int b){int ans=1;while(b){if(b&1) ans*=a;a*=a;b>>=1;ans%=mod;a%=mod;}return ans%mod;} int gcd(int a,int b) {if(a<b)swap(a,b);while(b){int tmp=b;b=a%b;a=tmp;}return a;} int mul(int a,int b){return ((a%mod)*(b%mod))%mod;} int sum(int a,int b){return ((a%mod)+(b%mod))%mod;} //typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_set; // typedef // tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_multiset; void solve(){ int n,m; cin>>n>>m; vi arr(n+5); for(int i=1;i<=n;i++) cin>>arr[i],arr[i]-=i*m; // for(int i=1;i<=n;i++) arr[i]=-arr[i]; multiset<int> lis; for(int i=1;i<=n;i++){ if(arr[i]>0) continue; if(lis.empty() || arr[i]<=*lis.begin()) {lis.insert(arr[i]);continue;} auto itr = upper_bound(lis.begin(),lis.end(),arr[i]); if(itr==lis.begin()) continue; else{ itr--; // if(*itr==arr[i]) lis.insert(arr[i]); lis.erase(lis.find(*itr)); lis.insert(arr[i]); } } // for(auto u : lis) cout<<u<<" ";cout<<endl; cout<<n-(int)lis.size()<<endl; } int32_t main(/*int32_t argc, char* argv[]*/){ std::ios_base::sync_with_stdio(0); std::cin.tie(0); // freopen("cowjog.in", "r", stdin); // freopen("cowjog.out", "w", stdout); int t=1; // cin >> t; while (t--) solve(); return 0; }