foo.cc: In function 'void solve()':
foo.cc:43:16: error: found ':' in nested-name-specifier, expected '::'
   43 |         for(it : divisor[a[i]]) nextGc[it] = LLONG_MAX ;
      |                ^
      |                ::
foo.cc:43:13: error: 'it' has not been declared
   43 |         for(it : divisor[a[i]]) nextGc[it] = LLONG_MAX ;
      |             ^~
foo.cc:44:5: error: expected primary-expression before '}' token
   44 |     }
      |     ^
foo.cc:43:57: error: expected ';' before '}' token
   43 |         for(it : divisor[a[i]]) nextGc[it] = LLONG_MAX ;
      |                                                         ^
      |                                                         ;
   44 |     }
      |     ~                                                    
foo.cc:44:5: error: expected primary-expression before '}' token
   44 |     }
      |     ^
foo.cc:43:57: error: expected ')' before '}' token
   43 |         for(it : divisor[a[i]]) nextGc[it] = LLONG_MAX ;
      |            ~                                            ^
      |                                                         )
   44 |     }
      |     ~                                                    
foo.cc:44:5: error: expected primary-expression before '}' token
   44 |     }
      |     ^