#include <iostream> using namespace std; int shuzu[10]; void panduan(); int main() { panduan(); return 0; } void panduan() { int i=0, j=0, k=0, n=0; int min, secondmin; cin >> n; for (i = 0; i < n; i++) { secondmin = 101; min = 101; cin >> j; for (k = 0; k < j; k++) { cin >> shuzu[k]; } min = shuzu[0]; for (k = 1; k < j; k++) { if (shuzu[k] < min) { secondmin = min; min = shuzu[k]; } else if (shuzu[k]<secondmin && shuzu[k]!=min) { secondmin = shuzu[k]; } } if (secondmin == 101 or secondmin==min) { cout << "NO"<<endl; } else { cout << secondmin<<endl; } } return; }