View Compilation Error

0_0_38777887_25737.cpp: In function 'bool check(int)':
0_0_38777887_25737.cpp:91:38: error: 'tarjan' was not declared in this scope; did you mean 'tarjan_s'?
   91 |         fp(i,0,(n<<1)-1) if(!dfn[i]) tarjan(i);
      |                                      ^~~~~~
      |                                      tarjan_s