View Compilation Error

0_0_16763427_23496.cpp: In function 'int main()':
0_0_16763427_23496.cpp:23:19: error: unable to find numeric literal operator 'operator""xf'
         memset(dp,03xf,sizeof(dp));
                   ^
0_0_16763427_23496.cpp:23:19: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes