Anik- Of Gears and Boxes

#include <bits/stdc++.h>
#define ll long long
using namespace std;

int main(){
    ll int n,box,capacity,i,prev=0,dum_capa,x;
    cin>>n>>box>>capacity;
    dum_capa = capacity;
    for(i=0;i<n;i++){
        cin>>x;
        if(prev!=x){
            box--;
            prev = x;
            dum_capa= capacity;
        }
        else{
            if(dum_capa==0){
                box--;
                dum_capa= capacity;
            }
        }
        dum_capa--;
    }
    cout<<abs(0-box)<<endl;
}