#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=1e6+5;
const ll inf=1e18;
ll t,n,x;
ll a[N];
int main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>t;
	while(t--){
		ll mx=0,sum=0;
		cin>>n>>x;
		for(int i=1;i<=n;i++){
			cin>>a[i];
			sum+=a[i];
			mx=max(mx,a[i]);
		}
		cout<<max(mx,(sum+x-1)/x)<<'\n';
		//(sum+x-1)/x的操作类似于向上取整，跟ceil函数作用一样
	}
	return 0;
}