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View Compilation Error

0_0_24372693_27838.cpp:30:1: error: reference to 'vector' is ambiguous
 vector verunit(point a,point b){
 ^
0_0_24372693_27838.cpp:14:15: note: candidates are: typedef struct point vector
 typedef point vector;
               ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/vector:64:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/random.h:34,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:49,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_24372693_27838.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_vector.h:214:11: note:                 template<class _Tp, class _Alloc> class std::vector
     class vector : protected _Vector_base<_Tp, _Alloc>
           ^
0_0_24372693_27838.cpp:30:1: error: 'vector' does not name a type
 vector verunit(point a,point b){
 ^
0_0_24372693_27838.cpp: In function 'void solve()':
0_0_24372693_27838.cpp:49:33: error: 'verunit' was not declared in this scope
     point p1=m+verunit(p[i],p[j])*dist(p[i],p[j])/2.0;
                                 ^


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