View Compilation Error

0_0_38550854_10030.cpp: In function 'int main()':
0_0_38550854_10030.cpp:13:10: error: unable to find numeric literal operator 'operator""By'
 s=sqrt(x%2By);
          ^
0_0_38550854_10030.cpp:13:10: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes