collatz

#include <stdio.h>

int main()
{
    int number, times;

    /* 0 < number < MAX_INT */
    scanf("%d", &number);

    times = 1;

    do {
        number = (number % 2 == 0) ? number/2 : number*3+1;
        times++;
    } while (number != 1);

    printf("%d\n", times);

    return 0;
}