View Compilation Error

0_0_11464752_27408.cpp:8:25: unordered_map: No such file or directory
0_0_11464752_27408.cpp:15: error: `std::unordered_map' has not been declared
0_0_11464752_27408.cpp:18: error: expected constructor, destructor, or type conversion before '<' token
0_0_11464752_27408.cpp:18: error: expected `,' or `;' before '<' token
0_0_11464752_27408.cpp: In member function `bool Team::operator<(const Team&) const':
0_0_11464752_27408.cpp:62: error: `cache' undeclared (first use this function)
0_0_11464752_27408.cpp:62: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11464752_27408.cpp: In function `int main()':
0_0_11464752_27408.cpp:214: error: `cache' undeclared (first use this function)