View Compilation Error

0_0_1955632_3559.cpp:2:19: hash_map: No such file or directory
0_0_1955632_3559.cpp: In function `int main()':
0_0_1955632_3559.cpp:65: error: `hash_map' undeclared (first use this function)
0_0_1955632_3559.cpp:65: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1955632_3559.cpp:65: error: expected primary-expression before ',' token
0_0_1955632_3559.cpp:65: error: expected primary-expression before "int"
0_0_1955632_3559.cpp:65: error: expected `;' before "int"
0_0_1955632_3559.cpp:73: error: `m2' undeclared (first use this function)
0_0_1955632_3559.cpp:128: error: `m1' undeclared (first use this function)