View Compilation Error

0_0_37768847_14553.cpp: In function 'int main()':
0_0_37768847_14553.cpp:45:14: error: unable to find numeric literal operator 'operator""F'
   memset(dis,3F,sizeof(dis));
              ^
0_0_37768847_14553.cpp:45:14: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes