/in/foo.cc: In function 'int main()':
/in/foo.cc:5:33: error: conflicting declaration 'long long int a [100]'
  long long n,a,b,i,count=0,a[100],b[100],c[100];
                                 ^
/in/foo.cc:5:14: note: previous declaration as 'long long int a'
  long long n,a,b,i,count=0,a[100],b[100],c[100];
              ^
/in/foo.cc:5:40: error: conflicting declaration 'long long int b [100]'
  long long n,a,b,i,count=0,a[100],b[100],c[100];
                                        ^
/in/foo.cc:5:16: note: previous declaration as 'long long int b'
  long long n,a,b,i,count=0,a[100],b[100],c[100];
                ^
/in/foo.cc:8:11: error: invalid types 'long long int[long long int]' for array subscript
   cin>>a[i]>>b[i]>>c[i];
           ^
/in/foo.cc:8:17: error: invalid types 'long long int[long long int]' for array subscript
   cin>>a[i]>>b[i]>>c[i];
                 ^