View Compilation Error

0_0_36441273_13428.cpp:2:13: error: expected unqualified-id before numeric constant
 #define inf 0x3f3f3f3f
             ^
0_0_36441273_13428.cpp:15:10: note: in expansion of macro 'inf'
 const ll inf=1ll<<60;
          ^
0_0_36441273_13428.cpp: In function 'long long int dis(int, int)':
0_0_36441273_13428.cpp:30:26: error: 'fab' was not declared in this scope
  return fab(p[i].x-p[j].x)+fab(p[i].y-p[j].y);
                          ^