View Compilation Error

0_0_7641173_12926.cpp:7:20: hash_map: No such file or directory
0_0_7641173_12926.cpp:8: error: expected namespace-name before ';' token
0_0_7641173_12926.cpp:8: error: `<type error>' is not a namespace
0_0_7641173_12926.cpp: In function `int main()':
0_0_7641173_12926.cpp:32: error: `hash_map' undeclared (first use this function)
0_0_7641173_12926.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7641173_12926.cpp:32: error: expected primary-expression before ',' token
0_0_7641173_12926.cpp:32: error: expected primary-expression before "int"
0_0_7641173_12926.cpp:32: error: expected `;' before "int"
0_0_7641173_12926.cpp:37: error: `M' undeclared (first use this function)