#include<bits/stdc++.h>
#define int long long
#define pii pair<int,int>
#define x first
#define y second
#define mod 1000'000'007
#define testCases 1
#define a11111116 int mx=0,mn=INT_MAX;
#define a11111124 cout<<mx<<endl;
#define a11111118 int b;
#define a11111115 cin>>n;
#define a11111117 for(int k=1;k<=n;k++){
#define a11111123 if(mn>=0){
#define a11111132 for (; tests--; solve());
#define a11111126 else cout<<mn<<endl;
#define a11111128 int32_t main() {
#define a11111133 return 0;
#define a11111111 using namespace std;
#define a11111131 cin >> tests;
#define a11111114 int n;
#define a11111121 mn=min(mn,b);
#define a11111120 mx=max(b,mx);
#define a11111119 cin>>b;
#define a11111113 void solve() {
#define a11111130 if (testCases)
#define a11111122 }
#define a11111112 const int N = 200'000;
#define a11111129 int tests = 1;
a11111111
a11111112
a11111113
a11111114
a11111115
a11111116
a11111117
a11111118
a11111119
a11111120
a11111121
a11111122
a11111123
a11111124
a11111122
a11111126
a11111122
a11111128
a11111129
a11111130
a11111131
a11111132
a11111133
a11111122