View Compilation Error

0_0_8930155_21070.cpp: In function `void Tarjan(int, int)':
0_0_8930155_21070.cpp:92: error: `tm' undeclared (first use this function)
0_0_8930155_21070.cpp:92: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8930155_21070.cpp: In function `int main()':
0_0_8930155_21070.cpp:200: error: `tm' undeclared (first use this function)