题解 | #汽水瓶#
汽水瓶
https://www.nowcoder.com/practice/fe298c55694f4ed39e256170ff2c205f
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextInt()) { // 注意 while 处理多个 case
int a = in.nextInt();
if (a == 0) {
break;
}
int count = 0;
int left = a % 3;
int newEmpty = a / 3;
count += newEmpty;
// 临时变量，防止计算后被重新赋值
int tempLeft = left;
while (newEmpty + left >= 3) {
left = (newEmpty + left) % 3;
newEmpty = (newEmpty + tempLeft) / 3;
count += newEmpty;
tempLeft = left;
}
if (newEmpty + left == 2) {
count++;
}
System.out.println(count);
}
}
}
