Shared code

#include<bits/stdc++.h>
#define inf 1e9+5
#define N 20
#define fr first
#define sc second
using namespace std;

int v[N];
pair <int, int> dp[(1 << N)];

bool comp(pair <int, int> a, pair <int, int> b){
    if(a.fr > b.fr) return true;
    if(a.fr < b.fr) return false;
    if(a.sc > b.sc) return true;
    return false;
}

int main(){
    int n, x;
    cin >> n >> x;

    for(int i = 0;i < n;i++){
        cin >> v[i];
    }

    dp[0].fr = 0;
    dp[0].sc = 0;

    for(int mask = 1;mask < (1 << n);mask++){
        dp[mask] = {inf, inf};
        for(int i = 0;i < n;i++){
            if((mask & (1 << i)) != 0){
                int s = (mask ^ (1 << i));
                pair <int, int> aux;
                if(dp[s].sc + v[i] > x){
                    aux.fr = dp[s].fr +1;
                    aux.sc = v[i];
                }

                else aux = {dp[s].fr, dp[s].sc + v[i]};

                if(comp(dp[mask], aux)){
                    dp[mask] = aux;
                }
            }
        }

        // cout <<mask << " " << dp[mask].fr << " " << dp[mask].sc << "\n";    
    }

    cout <<  dp[(1 << n)-1].fr + (dp[(1 << n) - 1].sc == 0 ? 0 : 1) << "\n";

    return 0;
}