View Compilation Error

0_0_5566558_8775.cpp: In function `void _input()':
0_0_5566558_8775.cpp:36: error: `hh' undeclared (first use this function)
0_0_5566558_8775.cpp:36: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5566558_8775.cpp: In function `int find_road(int, int, int, int, int, int)':
0_0_5566558_8775.cpp:70: error: `hh' undeclared (first use this function)
0_0_5566558_8775.cpp: In function `int main()':
0_0_5566558_8775.cpp:84: error: `hh' undeclared (first use this function)