View Compilation Error

0_0_27033537_4954.cpp: In function 'int main()':
0_0_27033537_4954.cpp:101:13: error: too few arguments to function 'int tarjan(int, int)'
     tarjan(i);
             ^
0_0_27033537_4954.cpp:43:5: note: declared here
 int tarjan(int x, int fa)
     ^