View Compilation Error

0_0_37551630_14247.cpp:8:7: error: 'LL' does not name a type
 const LL INF = 0x3f3f3f3f3f3f3f3fLL;
       ^
0_0_37551630_14247.cpp: In function 'int main()':
0_0_37551630_14247.cpp:37:22: error: 'INF' was not declared in this scope
         double ans = INF;
                      ^