View Compilation Error

0_0_16584473_16905.cpp: In function 'll dist(int, int)':
0_0_16584473_16905.cpp:40:10: error: unable to find numeric literal operator 'operator""LLp'
  return (1LLp[i].x-p[j].x)*(1LL*p[i].x-p[j].x)+(1LL*p[i].y-p[j].y)*(1LL*p[i].y-p[j].y);
          ^
0_0_16584473_16905.cpp:40:10: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes