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View Compilation Error

0_0_25521440_3761.cpp:9:1: error: reference to 'unordered_map' is ambiguous
 unordered_map<int,int> mp;
 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/tr1/unordered_map:42:0,
                 from 0_0_25521440_3761.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/tr1/unordered_map.h:180:11: note: candidates are: template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> class std::tr1::unordered_map
     class unordered_map
           ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/unordered_map:48:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:115,
                 from 0_0_25521440_3761.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/unordered_map.h:98:11: note:                 template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc> class std::unordered_map
     class unordered_map
           ^
0_0_25521440_3761.cpp:9:1: error: 'unordered_map' does not name a type
 unordered_map<int,int> mp;
 ^
0_0_25521440_3761.cpp: In function 'int main()':
0_0_25521440_3761.cpp:22:4: error: 'mp' was not declared in this scope
    mp.clear();
    ^


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