View Compilation Error

0_0_10262918_14627.cpp:14: error: `Hash' was not declared in this scope
0_0_10262918_14627.cpp: In member function `void node::cr()':
0_0_10262918_14627.cpp:17: error: `fir' undeclared (first use this function)
0_0_10262918_14627.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10262918_14627.cpp: In member function `void node::push(int, LL)':
0_0_10262918_14627.cpp:20: error: `fir' undeclared (first use this function)
0_0_10262918_14627.cpp:20: error: `Hash' undeclared (first use this function)