func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n;       int v[1000];       cin >> n;       for (int i = 0; i < n; i++) {         cin >> v[i];         v[i] = abs(v[i]);       }       int signo = 1;       for (int i = 0; i < n - 1; i++) {         cout << v[i] * signo <<    ;         signo *= -1;       }       cout << v[n - 1] * signo << endl;     }     return 0;   }   