View Compilation Error

0_0_37766218_12232.cpp: In function 'void solve()':
0_0_37766218_12232.cpp:38:11: error: unable to find numeric literal operator 'operator""sizeof'
  memset(p,0sizeof(p));
           ^
0_0_37766218_12232.cpp:38:11: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes