human
Can you provide a code to largest number not greater than N all the digits of which are odd and the other steps required given the following:
Largest number not greater than N all the digits of which are odd | function to return the largest number with all digits odd.
convert the number to a string for easy operations.
find first even digit.
if no even digit , then N is the answer.
till first even digit , add all odd numbers.
decrease 1 from the even digit.
add 9 in the rest of the digits.
Driver Code"
Solution in Python:
assistant
#Here is code to largest number not greater than N all the digits of which are odd and the other steps required.
 def largestNumber ( n ) :
	s = " "
	duplicate = n
	while ( n ) :
		s = chr ( n % 10 + 48 ) + s
		n //= 10
	index = - 1
	for i in range ( len ( s ) ) :
		if ( ( ( ord ( s [ i ] ) - ord ( '0' ) ) % 2 & 1 ) == 0 ) :
			index = i
			break
	if ( index == - 1 ) :
		return duplicate
	num = 0
	for i in range ( index ) :
		num = num * 10 + ( ord ( s [ i ] ) - ord ( '0' ) )
	num = num * 10 + ( ord ( s [ index ] ) - ord ( '0' ) - 1 )
	for i in range ( index + 1 , len ( s ) ) :
		num = num * 10 + 9
	return num
N = 24578
print ( largestNumber ( N ) )