View Compilation Error

0_0_31532780_27775.cpp: In function 'void iniTarjan()':
0_0_31532780_27775.cpp:31:9: error: 'in' was not declared in this scope
  memset(in, 0, sizeof(in));
         ^
0_0_31532780_27775.cpp:32:9: error: 'out' was not declared in this scope
  memset(out, 0, sizeof(out));
         ^