Stable Groups.cpp

// https://codeforces.com/contest/1539/problem/C
// Concept used : Heap and Multiset
//  299143BT
#include<bits/stdc++.h>
#define int long long int
#define MOD 1000000007
#define pi 3.1415926535
#define fi first
#define se second
#define vll vector<int>
#define vpll vector<pair <int,int> >
#define vvll vector< vll >
#define str string
#define umap unordered_map
#define uset unordered_set
#define rep(i,n) for(int i=0;i<n;i++)
#define repA(i,s,n) for(int i=s;i<=n;i++)
#define repD(i,s,n) for(int i=s;i>=n;i--)
#define pb push_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define elif else if
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define ALL(v) v.begin(),v.end()
#define sortA(v) sort(ALL(v))
#define sortD(v) sort(ALL(v),greater <int> ())
#define print(v) for(auto itr:v) cout<<itr<<" ";
#define sz size()
#define nl cout<<"\n";
using namespace std;
int factorial(int n){return (n==1||n==0)?1:n*factorial(n-1);}
int power(int x,int y){int res=1;while(y>0){if(y&1)res=res*x;y=y>>1;x=x*x;}return res;}
int powerMod(int x,int y,int m){if(y==0)return 1;int p=powerMod(x,y/2,m)%m;p=(p*p)%m;return (y%2==0)?p:(x*p)%m;}
int modInverse(int a,int m){return powerMod(a,m-2,m);}
int gcd(int a,int b){if(a==0){return b;}else if(b==0){return a;}else{if(a>b){return gcd(a%b,b);}else{return gcd(b%a,a);}}}

void pre(){}

void solve(int t) {

    int n=0,k=0,x=0;
    cin>>n>>k>>x;
    vll v(n);
    rep(i,n) cin>>v[i];
    sortA(v);
    vll tmp(n-1);
    rep(i,n-1) tmp[i]=max(v[i+1]-v[i],(int)0);
//    print(tmp);nl
    multiset <int> ms;
    rep(i,n-1){
        if(tmp[i]<=x) continue;
        ms.insert(tmp[i]);
    }
    int ans=1;
    for(auto itr:ms){
        int req=((itr-1)/x);
//        cout<<itr<<" "<<req;nl
        if(k>=req) k-=req;
        else ans++;
    }
    cout<<ans;
//    rep(i,n-1){
//        if(tmp[i]<=x) continue;
//        int req=((tmp[i])/x)-(tmp[i]%x==0);
//        cout<<i<<" : "<<req;nl
//        if(req<=k) k-=req;
//        else ans++;
//    }
//    cout<<ans;
}

int32_t main(){
    fast
    int t=1;
//    cin>>t;
    pre();
    rep(i,t) solve(t);
    return 0;
}