Ferris Wheel

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

int main(){
    int n, x;
    cin >> n >> x;
    vector<int> weight;

    for(int i=0; i<n; i++){
        int input;
        cin >> input;
        weight.push_back(input);
    }

    sort(weight.begin(), weight.end());
    int count=0;

    while(weight.empty()==0){
        int first = weight[0];
        weight.erase(weight.begin());
        if(first+weight[0]<=x){
            count++;
            weight.erase(weight.begin());
        }else{
            count++;
        }
    }

    cout << count << endl;
}