View Compilation Error

0_0_39761935_22186.cpp: In function 'void dfs(int, int)':
0_0_39761935_22186.cpp:14:21: error: 'L' was not declared in this scope
   14 |     for (int i=1;i<=L;i++)
      |                     ^
0_0_39761935_22186.cpp: In function 'int lca(int, int)':
0_0_39761935_22186.cpp:24:16: error: 'L' was not declared in this scope
   24 |     for (int i=L;i>=0;i--) if (dep[fa[x][i]]>=dep[y])
      |                ^
0_0_39761935_22186.cpp:27:16: error: 'L' was not declared in this scope
   27 |     for (int i=L;i>=0;i--) if (fa[x][i]!=fa[y][i])
      |                ^