View Compilation Error

0_0_6425017_8513.cpp: In function `void tarjan(int)':
0_0_6425017_8513.cpp:51: error: `count' undeclared (first use this function)
0_0_6425017_8513.cpp:51: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6425017_8513.cpp: In function `int solve()':
0_0_6425017_8513.cpp:66: error: `count' undeclared (first use this function)