DIM A, B, M, R, T AS INTEGER
A = -10 : B = 10
M = A : R = F(A)
FOR T = A TO B
  IF F(T + 1) <= R THEN
    M = T : R = F(T)
  END IF
NEXT T
PRINT M - R

FUNCTION F(x)
  F = abs(9 - (x - 3) * (x - 3)) - 2
END FUNCTION