View Compilation Error

0_0_14149945_2168.cpp:17:9: error: macro names must be identifiers
 #define 0x3f3f3f3f3f3f3f3f;  
         ^
0_0_14149945_2168.cpp: In function 'void init()':
0_0_14149945_2168.cpp:30:8: error: 'INF' was not declared in this scope
  ans = INF;
        ^