foo.cpp: In function 'int check(int, int)':
foo.cpp:31:13: error: invalid types 'int[int]' for array subscript
       if(x[i]>=x-d&&x[i]<=x+d)
             ^
foo.cpp:31:24: error: invalid types 'int[int]' for array subscript
       if(x[i]>=x-d&&x[i]<=x+d)
                        ^
foo.cpp:32:15: error: invalid types 'int[int]' for array subscript
         if(y[i]>=y-d&&y[i]<=y+d)
               ^
foo.cpp:32:26: error: invalid types 'int[int]' for array subscript
         if(y[i]>=y-d&&y[i]<=y+d)
                          ^