/in/foo.cc: In function 'int main()':
/in/foo.cc:17:15: error: invalid types 'int[int]' for array subscript
  if((a[i]||x[i])>=x[i+1]&&(a[i]||x[i])<=a[i+1]){
               ^
/in/foo.cc:17:24: error: invalid types 'int[int]' for array subscript
  if((a[i]||x[i])>=x[i+1]&&(a[i]||x[i])<=a[i+1]){
                        ^
/in/foo.cc:17:37: error: invalid types 'int[int]' for array subscript
  if((a[i]||x[i])>=x[i+1]&&(a[i]||x[i])<=a[i+1]){
                                     ^
/in/foo.cc:18:16: error: invalid types 'int[int]' for array subscript
   if((b[i]||y[i])>=y[i+1]&&(b[i]||y[i])<=b[i+1]) {
                ^
/in/foo.cc:18:25: error: invalid types 'int[int]' for array subscript
   if((b[i]||y[i])>=y[i+1]&&(b[i]||y[i])<=b[i+1]) {
                         ^
/in/foo.cc:18:38: error: invalid types 'int[int]' for array subscript
   if((b[i]||y[i])>=y[i+1]&&(b[i]||y[i])<=b[i+1]) {
                                      ^
/in/foo.cc:20:22: error: invalid types 'int[int]' for array subscript
     cout<<k<<" "<<x[i]<<y[i];} 
                      ^
/in/foo.cc:20:28: error: invalid types 'int[int]' for array subscript
     cout<<k<<" "<<x[i]<<y[i];} 
                            ^