c039. 00100 - The 3n + 1 problem -- UVa100 | From: [1.162.104.7] | 發表日期 : 2012-03-22 22:14

#include<stdio.h>

#include<stdlib.h>

#include<math.h>

int main()

{

    int i,a,q=0,x=0,s[100],n;

    int p,w;

while(scanf("%d%d",&w,&n)!=EOF)

{

x=0;

p=0;

for(i=w;i<=n;i++)

{

a=i;

p=0;

while(a!=1)

{

if(p==0)

p=1;

p++;

if(a%2==0)

{

a/2;

}

else

a=a*3+1;

if(p>=x)

{

x=p;

}

}

}

printf("%d%d%d\n",w,n,x);

}

}