View Compilation Error

0_0_21691420_22811.cpp: In function 'void primitive_roots(int64)':
0_0_21691420_22811.cpp:105:13: error: 'gs' was not declared in this scope
             gs.push_back(pow_mod(g0, i, n));
             ^
0_0_21691420_22811.cpp:106:10: error: 'gs' was not declared in this scope
     sort(gs.begin(), gs.end());
          ^