#include 
#include 
#include 
//#include 

using namespace std;
typedef long long ll;
const int maxn = 1e5 + 10;
int n, d;
ll p;
int v[maxn];
bool check(int x) {
    priority_queue pq, greatest;
    for(int i = 0; i < n; i++) {
        pq.push(v[i]);
    }
    ll sum = 0;
    for(int i = 1; i <= d; i++) {
        int max_element = 0;
        if(!pq.empty()) {
            max_element = pq.top();
            pq.pop();
        }
        sum += max_element;
        if(i > x) {
            pq.push(greatest.top());
            greatest.pop();
        }
        greatest.push(max_element);
    }
    return sum >= p;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin >> n >> p >> d;
    
    
    for(int i = 0; i < n; i++) {
        cin >> v[i];
    }
    
    int L = 1, R = d;
    int res = -1;
    while(L <= R) {
        int mid = (L + R) / 2;
        if(check(mid)) {
            L = mid + 1;
            res = max(res, mid);
        }
        else {
            R = mid - 1;
        }
    }
    if(res == d) {
        cout << "seedno" << endl;
    }
    else {
        cout << res << endl;
    }
    return 0;
}