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Top Resume Builder in 2k21

Step Numbers from 1 to N

#include<stdio.h>
#include <stdlib.h>

int main()
{
    int a,f=1;
    scanf("%d",&a);
    for(int i=10;i<=a;i++)
    {
        int v=i;
        while(v>9)
        {
            if
            (abs(v%10-v/10%10)!=1)
            {
            v=-1;
            break;
            }
            v=v/10;
        }
        if(v!=-1)
        {
        printf("%d ",i);
        f=0;
        }
    }
    if(f)
    printf("-1");
}

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