View Compilation Error

0_0_25857978_12229.cpp: In function 'int main()':
0_0_25857978_12229.cpp:72:22: error: 'e8' was not declared in this scope
         else if(n<=4*e8)
                      ^
0_0_25857978_12229.cpp:85:29: error: 'ans' was not declared in this scope
             printf("%lld\n",ans);
                             ^