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#include<bits/stdc++.h>
#define vpi vector<pair,int>>
#define pii pair<int,int>
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define mp make_pai
using namespace std;
int main()
{
   int t;cin>>t;
   while(t--)
   {
       int n,k;cin>>n>>k;
       int a[n];
       int sum=0;
       for(int i=0;i<n;i++)
       {
           int j;cin>>j;sum+=j;a[i]=j;
       }
       sort(a,a+n);int sum1=0;
       if(k>(n-k))
        k=n-k;
       for(int i=0;i<k;i++)
        sum1+=a[i];
       cout<<sum-2*sum1<<endl;
   }
}

Runtime error #stdin #stdout 1s 16064KB

stdin

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Standard input is empty

stdout

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https://ideone.com/DjBehj

language:

C++14 (gcc 8.3)

created:

visibility:

secret

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