/in/foo.cc:7:1: error: expected ',' or ';' before 'const'
 const long long inf=1<<31;
 ^~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:52:20: error: 'inf' was not declared in this scope
  b.insert((node){0,inf,0});
                    ^~~