View Compilation Error

0_0_39071817_26301.cpp: In function 'int main()':
0_0_39071817_26301.cpp:29:28: error: unable to find numeric literal operator 'operator""sizeof'
   29 |                 memset(vis,0.sizeof vis);
      |                            ^~~~~~~~
0_0_39071817_26301.cpp:29:28: note: use '-fext-numeric-literals' to enable more built-in suffixes