View Compilation Error

0_0_14866218_3959.cpp:6:1: error: expected ',' or ';' before 'using'
 using namespace std;
 ^
0_0_14866218_3959.cpp: In function 'void Union(int, int)':
0_0_14866218_3959.cpp:43:12: error: 'father' was not declared in this scope
  int tmp = father[r1] + father[r2];
            ^
0_0_14866218_3959.cpp: In function 'int main()':
0_0_14866218_3959.cpp:73:17: error: 'sort' was not declared in this scope
   sort(c+1,c+m+1);
                 ^
0_0_14866218_3959.cpp:73:17: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from 0_0_14866218_3959.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note:   'std::sort'
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
     ^