小易去买苹果,有两种包装,一种一袋8个,一种一袋6个,小易要买n个苹果(不能多也不能少),输出袋子最少的购买方案,如无法正好买到n个,则输出-1.
public class BuyApple {
public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("输入一个整数:"); int n = input.nextInt(); int[] min = buyApple(n); if(min[0] == n){ System.out.println(-1); }else{ System.out.println("最少需要"+min[0]+"袋,其中:8个苹果"+min[1]+"袋、6个苹果"+min[2]+"袋"); } }public static int[] buyApple(int n) {
int min = n; int[] results = {n,0,0};//总袋数,8个的袋数,6个的袋数 if(n%8 == 0){ results[0] = n/8; results[1] = n/8; }else if(n%6 == 0){ if(n/6 < results[0]){ results[0] = n / 6; results[1] = n / 6; } }else{ for(int i = 0; i <= n/8; ++i){ if((n-8*i)%6 == 0){ if((n-8*i)/6 + i < min){ results[0] = (n-8*i)/6 + i; results[1] = i; results[2] = (n-8*i)/6; } } } } return results; }}