View Compilation Error

46027_0_31859.cpp:7:20: hash_map: No such file or directory
46027_0_31859.cpp: In function `int main()':
46027_0_31859.cpp:28: error: `hash_map' undeclared (first use this function)
46027_0_31859.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
46027_0_31859.cpp:28: error: expected primary-expression before ',' token
46027_0_31859.cpp:28: error: expected primary-expression before '>' token
46027_0_31859.cpp:28: error: `ap' undeclared (first use this function)