POJ 3994

题意/题解：大水题，不想说了。

View Code

 1 #include<cstdio>

 2 #include<cstring>

 3 using namespace std;

 4 int main()

 5 {

 6     int ca=0,n;

 7     while(scanf("%d",&n),n)

 8         printf("%d. %s %d\n",++ca,(n%2==0)?"even":"odd",(3*n+1)/2/3);

 9     return 0;

10 }