/in/foo.cc: In function 'void rotate(int)':
/in/foo.cc:29:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(!isroot(y))t[z].ch[t[z].ch[1]==y]=x;  t[x].fa=z;
     ^~
/in/foo.cc:29:46: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(!isroot(y))t[z].ch[t[z].ch[1]==y]=x;  t[x].fa=z;
                                              ^