题解 | #汽水瓶# Java 普通实现

public class Algorithm { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int num = sc.nextInt(); int drink; int count = 0; while (num >= 2){ if (num == 2){ count++; break; }else{ drink = num - num % 3; count += drink / 3; num = drink / 3 + num % 3; } } System.out.println(count); } }