View Compilation Error

0_0_28882740_32561.cpp: In function 'int main()':
0_0_28882740_32561.cpp:25:31: error: 'en' was not declared in this scope
   if(n&i)(ans+=(n%i+1ll+((n>>(en+1)<<len)%MO)%MO)%=MO;
                               ^
0_0_28882740_32561.cpp:25:54: error: expected ')' before ';' token
   if(n&i)(ans+=(n%i+1ll+((n>>(en+1)<<len)%MO)%MO)%=MO;
                                                      ^