View Compilation Error

0_0_24900064_31788.cpp: In function 'int main()':
0_0_24900064_31788.cpp:38:3: error: 'unionfind' was not declared in this scope
   unionfind a;
   ^
0_0_24900064_31788.cpp:39:3: error: 'a' was not declared in this scope
   a.begin();
   ^