codeforce - sale

#include<bits/stdc++.h>
using namespace std;
#define fastread()(ios_base::sync_with_stdio(false),cin.tie(NULL));
int main()
{
    fastread()
    int n,k;;
    cin>>n>>k;
    int res[n],j=0;
    for(int i=0;i<n;i++)
    {
        int x;
        cin>>x;
        if(x<0)res[j++]=x;
    }
    sort(res,res+j);
    int sum=0;
    if(j<k)k=j;
    for(int i=0;i<k;i++)
    {
        sum-=res[i];
        //cout<<res[i]<<endl;
    }
    cout<<sum<<endl;
}