View Compilation Error

0_0_11015298_22233.cpp: In function `void tarjan()':
0_0_11015298_22233.cpp:73: error: `nj' undeclared (first use this function)
0_0_11015298_22233.cpp:73: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11015298_22233.cpp:73: error: expected `;' before ')' token