#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int a[1000],T,i,j,n,ans;
int main(){
    scanf("%I64d",&T);
    while(T--){
        scanf("%d",&n);
        for(i=1;i<=n;++i){
            scanf("%d",&a[i]);
        }
        ans=0;
        for(i=2;i<=n;++i){
            for(j=1;j<i;++j){
                if(a[j]>a[i])ans=max(ans,a[i]);
            }
        }
        printf("%d\n",ans);
    }
    return 0;
}