View Compilation Error

0_0_39434175_26201.cpp: In function 'int main()':
0_0_39434175_26201.cpp:8:31: error: unable to find numeric literal operator 'operator""a1'
    8 |                 vector<int> g[10000a1];
      |                               ^~~~~~~
0_0_39434175_26201.cpp:8:31: note: use '-fext-numeric-literals' to enable more built-in suffixes
0_0_39434175_26201.cpp:15:25: error: 'g' was not declared in this scope
   15 |                         g[a].push_back(b);
      |                         ^
0_0_39434175_26201.cpp:30:36: error: 'g' was not declared in this scope
   30 |                         for(auto y:g[x]){
      |                                    ^