BZOJ 1666 Usaco 奶牛的数字游戏

 1 #include <cstdio>
 2 #include <algorithm>
 3  
 4 int n;
 5 int tot;
 6  
 7 int main(){
 8     scanf("%d",&n);
 9     while(n!=1){
10         if(n%2!=0){
11             n=n*3+1;
12             tot++;
13         }
14         else if(n%2==0){
15             n>>=1;
16             tot++;
17         }
18     }
19     printf("%d\n",tot);
20 }