This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*
ID: samikgo1
TASK:
LANG: C++
*/
#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ll;
typedef pair<ll,ll> pll;
#define all(x) x.begin(),x.end()
#define allr(x) x.rbegin(),x.rend()
#define f first
#define s second
//#define x first
//#define y second
const int INF = INT32_MAX;
const ll modulo = 1e4;
//#define int ll
int32_t main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
// freopen("input.in","r",stdin);
// freopen("haybales.out","w",stdout);
int n,k;
cin >> n >> k;
vector<int> arr(n);
for(int&i:arr)cin>>i;
vector<int> arrsort = arr;
sort(all(arrsort));
for(int&i:arr) {
int index = lower_bound(all(arrsort),i)-arrsort.begin()+1;
if(index%k)index = index/k +1;
else index /= k;
i = index;
}
vector<int> lis;
for(int&i:arr){
if(lis.empty()){lis.emplace_back(i);continue;}
if(i>=lis.back()){lis.emplace_back(i);continue;}
*upper_bound(all(lis),i) = i;
}
cout << n-lis.size();
}
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