codechef - chef and price control

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fast()(ios_base::sync_with_stdio(0),cin.tie(NULL));
int main()
{
    fast()
    int t;
    cin>>t;
    while(t--)
    {
        int n,k;
        cin>>n>>k;
        int sum =0;
        for(int i=0;i<n;i++)
        {
            int x;
            cin>>x;
            if(x>k)sum+=(x-k);
        }
        cout<<sum<<endl;
    }
}