View Compilation Error

0_0_39570249_27157.cpp: In function 'int main()':
0_0_39570249_27157.cpp:50:28: error: 'x' was not declared in this scope
   50 |                         fa[x][pos]=get(l,v);
      |                            ^
0_0_39570249_27157.cpp:50:31: error: 'pos' was not declared in this scope; did you mean 'pow'?
   50 |                         fa[x][pos]=get(l,v);
      |                               ^~~
      |                               pow