/in/foo.cc: In function 'int main()':
/in/foo.cc:47:3: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else
   ^~~~
/in/foo.cc:48:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
   b=b;N=N-1; 
       ^
/in/foo.cc:54:18: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int*' [-Wformat=]
    printf("%d",&b);
                  ^
/in/foo.cc: In function 'bool comp_node(Node, Node)':
/in/foo.cc:18:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^