#include <cmath>
#include <queue>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#define LL long long
#define INF 0x3f3f3f3f
#define RR freopen("D:\\in.txt","r",stdin)
#define WW freopen("D:\\out.txt","w",stdout)
using namespace std;
const int maxn = 5e4+7;
int main()
{
    int n,t,i,a[33];
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        for(i=1;i<=n;i++)
            scanf("%d",a+i);
        sort(a+1,a+1+n);
        printf("%d\n",a[n]);
    }
    return 0;
}