View Compilation Error

0_0_39266566_27782.cpp: In function 'int find(int)':
0_0_39266566_27782.cpp:30:9: error: 'fa' was not declared in this scope
   30 |     if (fa[t] == t)
      |         ^~
0_0_39266566_27782.cpp:32:5: error: 'fa' was not declared in this scope
   32 |     fa[t] = find(fa[t]);
      |     ^~