题解 | #魔法数字变换#

#include <stdio.h>

int main() {
    int n, cnt = 0;
    while (scanf("%d", &n) != EOF) {
        while (n != 1) {
            if (n % 2 == 0) {
                n /= 2;
                cnt++;
            } else {
                n = n * 3 + 1;
                cnt++;
            }
        }
        printf("%d\n", cnt);
    }
    return 0;
}