题解 | #小乐乐改数字#

#include <stdio.h>
int main ()
{
long long power(int w);
long long n;
int i=1,w = 0,y ;
scanf("%ld",&n);
i = n;

while(i)
{
i = i/10;
w++;
}
int a[w +1];
    for(i = 0;i<w+1;i++)
    {
        a[i] = 0;
    }

    int v = w;
for(y = 1;y<=v;y++,w--)
{
  a[y] = n / (power(w-1));
  n = n%(power(w-1));
}

int sum = 0;
int k;

for(i = 1;i<=v;i++)
{
    if(a[i]%2 != 0)
    {
        printf("1");
        k = i;
        break;
    }
    if(i == v)
    {
        goto loop;
    }
}
for(i = k+1;i<=v;i++)
{

        if(a[i]%2 == 1)
        {
            printf("1");
        }
            else
        {
            printf("0");


}

}
    loop:for(i = 1;i<=v;i++)
    {
        sum  = a[i]%2+sum;
    }
    if(sum == 0)
    {
        printf("0");
    }
}
long long power (int w)
{
    int result = 1,i;
    if(w==0)
    {
        return 1;
    }
    for(i = 0;i <w;i++)

    {
        result *= 10;
}
    return result;
}