func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long T;     cin >> T;     while (T--) {       long long n, a[100005];       cin >> n;       for (long long i = 1; i <= n; i++) {         cin >> a[i];       }       long long ans = 0;       for (long long i = 1; i < n; i++) {         long long t = a[i] * a[i + 1];         ans = max(ans, t);       }       cout << ans << endl;     }     return 0;   }   