func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( Ofast,no-stack-protector,unroll-loops )   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native )   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long t;     cin >> t;     while (t--) {       long long n;       cin >> n;       long long a[n];       for (long long i = 0; i < n; i++) {         cin >> a[i];       }       long long b[n];       for (long long i = 0; i < n; i++) {         if (i % 2) {           if (a[i] >= 0)             b[i] = a[i];           else             b[i] = -a[i];         } else {           if (a[i] <= 0)             b[i] = a[i];           else             b[i] = -a[i];         }         cout << b[i] <<    ;       }       cout <<   n ;     }     return 0;   }   