View Compilation Error

0_0_24880427_3746.cpp: In function 'int main()':
0_0_24880427_3746.cpp:37:28: error: unable to find numeric literal operator 'operator""a'
         for(int i = 0; i < 10000a; i++){
                            ^
0_0_24880427_3746.cpp:37:28: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes