FUNCTION GetMinimum(a, b, c, d: Integer): Integer; BEGIN IF a < b THEN IF a < c THEN IF a < d THEN GetMinimum := a ELSE GetMinimum := d ELSE IF c < d THEN GetMinimum := c ELSE GetMinimum := d ELSE IF b < c THEN IF b < d THEN GetMinimum := b ELSE GetMinimum := d ELSE IF c < d THEN GetMinimum := c ELSE GetMinimum := d END;