View Compilation Error

0_0_39425335_26260.cpp: In function 'void tarjan(int, int)':
0_0_39425335_26260.cpp:34:17: error: 'p' was not declared in this scope
   34 |         if (low[p]==dfn[x])
      |                 ^
0_0_39425335_26260.cpp:44:31: error: 'id' was not declared in this scope
   44 |                 while (nw.id!=id);
      |                               ^~