题解 | #小乐乐改数字#

#include <stdio.h>
#include <string.h>

char s[15];

int main()
{
    int n;
    scanf("%d", &n);

    sprintf(s, "%d", n);

    for (int i = 0; i < strlen(s); i ++ )
    {
        if ((s[i] - '0') % 2 == 0) s[i] = '0';
        else s[i] = '1';
    }

    int res = 0;

    for (int i = 0; i < strlen(s); i ++ )
    {
        res = res * 10 + (s[i] - '0');
    }

    printf("%d", res);

    return 0;
}