foo.cc: In function 'int main()':
foo.cc:4:15: error: conflicting declaration 'int a [100001]'
    4 |  int n,a,cd=0,a[100001];
      |               ^
foo.cc:4:8: note: previous declaration as 'int a'
    4 |  int n,a,cd=0,a[100001];
      |        ^
foo.cc:7:11: error: invalid types 'int[int]' for array subscript
    7 |   cin>>a[i];
      |           ^
foo.cc:8:9: error: 'sort' was not declared in this scope; did you mean 'qsort'?
    8 |         sort(a+1,a+n+1);
      |         ^~~~
      |         qsort

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