题解 | #小乐乐改数字# #递归法#

#include <stdio.h>

int bian(long long n)
{
    int b = n%10;
    int c = b%2;
    n = n/10;
    if( n  )
    {
 
        return 10 * bian(n) +c;
    }
 
    return c;
}

int main()
{
    long long n = 0;
    scanf("%lld",&n);
    int a = bian(n);
    printf("%d",a);
    return 0;
}