#include<stdio.h>
int main()
{
long i,j,k,m,n,N;
while(scanf("%ld %ld",&i,&j)!=EOF)
{
N=1;
     if(i>0&&j<1000000)
     {

     
                 for(m=i;m<=j;m++)
                 {
                       n=1;
                        k=m;
                         while(k!=1)
                         {
                                    if(k%2==0)
                                           k=k/2;
                                    else
                                           k=k*3+1;
                                    n++;
                          }
                          if(n>N)
                                   N=n;
                           
                   }
                 printf("%ld %ld %ld\n",i,j,N);
     }
}
return 0;
}

if条件语句错了

运行结果是对的 可以说详细点么

可以将原题发下吗，ACM有很多陷阱的都在题目里

请问，如何输入210，输出是0   1   2 呢？

    int x;
    scanf("%d",&x);
    while(x!=0){
     printf("%d  ",x%10);
     x=x/10;}