View Compilation Error

0_0_20958840_21431.cpp: In function 'int main()':
0_0_20958840_21431.cpp:44:33: error: no matching function for call to 'find(edge&)'
      f[find(e[k].x)] = find(e[i]);
                                 ^
0_0_20958840_21431.cpp:44:33: note: candidates are:
0_0_20958840_21431.cpp:13:5: note: int find(int)
 int find(int x)
     ^
0_0_20958840_21431.cpp:13:5: note:   no known conversion for argument 1 from 'edge' to 'int'
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from 0_0_20958840_21431.cpp:2:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:3770:5: note: template<class _IIter, class _Tp> _IIter std::find(_IIter, _IIter, const _Tp&)
     find(_InputIterator __first, _InputIterator __last,
     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:3770:5: note:   template argument deduction/substitution failed:
0_0_20958840_21431.cpp:44:33: note:   candidate expects 3 arguments, 1 provided
      f[find(e[k].x)] = find(e[i]);
                                 ^