/in/foo.cc: In function 'Treap* Merge(Treap*, Treap*)':
/in/foo.cc:71:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(!x) return y;if(!y) return x;    
     ^~
/in/foo.cc:71:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(!x) return y;if(!y) return x;    
                     ^~