View Compilation Error

0_0_39526504_621.cpp: In function 'void solve()':
0_0_39526504_621.cpp:85:39: error: 'g' was not declared in this scope
   85 |                 if (a[i] % a[0] != 0) g = std::__gcd(g, a[i]);
      |                                       ^
0_0_39526504_621.cpp:88:20: error: 'g' was not declared in this scope
   88 |         if (a[0] < g) {
      |                    ^