View Compilation Error

0_0_38689947_9770.cpp: In function 'int tree_r(int)':
0_0_38689947_9770.cpp:40:19: error: 'cnt' was not declared in this scope; did you mean 'int'?
   40 |             trees[cnt++] = dfs(i, i, 0);
      |                   ^~~
      |                   int
0_0_38689947_9770.cpp:45:25: error: 'cnt' was not declared in this scope; did you mean 'int'?
   45 |     for (int i = 1; i < cnt; i++) {
      |                         ^~~
      |                         int