View Compilation Error

0_0_11825530_25694.cpp:3:25: unordered_map: No such file or directory
0_0_11825530_25694.cpp: In function `int main()':
0_0_11825530_25694.cpp:13: error: `unordered_map' undeclared (first use this function)
0_0_11825530_25694.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11825530_25694.cpp:13: error: expected primary-expression before ',' token
0_0_11825530_25694.cpp:13: error: expected primary-expression before "int"
0_0_11825530_25694.cpp:13: error: expected `;' before "int"
0_0_11825530_25694.cpp:17: error: `table' undeclared (first use this function)
0_0_11825530_25694.cpp:21: error: ISO C++ forbids declaration of `it' with no type
0_0_11825530_25694.cpp:23: error: base operand of `->' is not a pointer
0_0_11825530_25694.cpp:24: error: base operand of `->' is not a pointer
0_0_11825530_25694.cpp:24: error: base operand of `->' is not a pointer