#include <iostream>
using namespace std;
void solve(){
bool vozr = true, ubyv = true;
int prev, cur;
cin >> prev >> cur;
while(cur != 0){
if(cur >= prev) ubyv = false;
if(cur <= prev) vozr = false;
prev = cur;
cin >> cur;
}
if(vozr) cout << -1;
else if(ubyv) cout << 1;
else cout << 0;
cout << "\n";
}
signed main(){
int k;
cin >> k;
while(k--) solve();
}