foo.cc: In member function 'void Link_Cut_Tree::rotate(int)':
foo.cc:52:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   52 |     if(!isroot(y))c[z][c[z][1]==y]=x;fa[x]=z;
      |     ^~
foo.cc:52:38: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   52 |     if(!isroot(y))c[z][c[z][1]==y]=x;fa[x]=z;
      |                                      ^~

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