View Compilation Error

0_0_33692573_9573.cpp: In function 'int Find(int)':
0_0_33692573_9573.cpp:40:14: error: 'fa' was not declared in this scope
     if (x == fa[x])
              ^
0_0_33692573_9573.cpp:42:12: error: 'fa' was not declared in this scope
     return fa[x] = find(fa[x]);
            ^