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#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <cstring>
#include <queue>
#include <set>
#include <cmath>
#define ll long long
using namespace std;
int arr[100005];
int n,d;
ll p;

int f(int k){
    priority_queue<int>pq;
    priority_queue<int>iseceni;
    for(int i = 0;i<n;i++){
        pq.push(arr[i]);
    }
    ll sum =0;
    for(int i =1;i<=d;i++){
        int najgolemo = 0;
        if(!pq.empty()) {
            najgolemo = pq.top();
            pq.pop();
        }
            sum+= najgolemo;
            if(i>k and !iseceni.empty()){
                pq.push(iseceni.top());
                iseceni.pop();
            }
            iseceni.push(najgolemo);
        
    }
    
    if(sum >= p) return 1;
    else return  -1;
}
int main() {
   
    cin >> n >> p >>d;
    for(int i =0;i<n;i++){
        cin >> arr[i];
    }
    
    int left,right,mid;
    left = 0;
    right = d;
    int res = -1;
    while(left <= right){
        mid = (left+right)/2;
        if(f(mid) == 1){
            left= mid+1;
            res = max(res,mid);
        }
        else if(f(mid) == -1){
            right=mid-1;
        }
    }
    
    
    if(res == d){
        cout << "seedno";
    }
    else cout << res;
}