CF1515A.Phoenix and Gold
入门
通过率:0%
时间限制:2.00s
内存限制:256MB
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题目描述
Phoenix has collected n pieces of gold, and he wants to weigh them together so he can feel rich. The i-th piece of gold has weight wi. All weights are distinct. He will put his n pieces of gold on a weight scale, one piece at a time.
The scale has an unusual defect: if the total weight on it is exactly x, it will explode. Can he put all n gold pieces onto the scale in some order, without the scale exploding during the process? If so, help him find some possible order.
Formally, rearrange the array w so that for each i (1≤i≤n), j=1∑iwj=x.
凤凰收集了 n 块金子,他想将它们一起称重,以感受自己的富有。第 i 块金子的重量为 wi,所有重量互不相同。他将把这 n 块金子依次放到秤上,每次放一块。
该秤存在一个特殊缺陷:若秤上的总重量恰好为 x,则秤会爆炸。他能否以某种顺序将全部 n 块金子放到秤上,使得整个过程中秤都不会爆炸?如果可以,请帮他找出一种可行的放置顺序。
形式化地说:请重排数组 w,使得对每个 i(1≤i≤n),均有 j=1∑iwj=x。
输入格式
The input consists of multiple test cases. The first line contains an integer t (1≤t≤1000) — the number of test cases.
The first line of each test case contains two integers n and x (1≤n≤100; 1≤x≤104) — the number of gold pieces that Phoenix has and the weight to avoid, respectively.
The second line of each test case contains n space-separated integers (1≤wi≤100) — the weights of the gold pieces. It is guaranteed that the weights are pairwise distinct.
输入包含多个测试用例。第一行包含一个整数 t(1≤t≤1000),表示测试用例的数量。
每个测试用例的第一行包含两个整数 n 和 x(1≤n≤100;1≤x≤104),分别表示凤凰拥有的金块数量以及需要避开的重量值。
每个测试用例的第二行包含 n 个用空格分隔的整数(1≤wi≤100),表示各金块的重量。保证所有重量两两互不相同。
输出格式
For each test case, if Phoenix cannot place all n pieces without the scale exploding, print NO. Otherwise, print YES followed by the rearranged array w. If there are multiple solutions, print any.
对于每个测试用例,如果凤凰无法在不使天平爆炸的情况下放置全部 n 个砝码,则输出 NO。否则,输出 YES,后跟重排后的数组 w。若存在多种解法,输出任意一种即可。
输入输出样例
输入#1
3 3 2 3 2 1 5 3 1 2 3 4 8 1 5 5
输出#1
YES 3 2 1 YES 8 1 2 3 4 NO
说明/提示
In the first test case, Phoenix puts the gold piece with weight 3 on the scale first, then the piece with weight 2, and finally the piece with weight 1. The total weight on the scale is 3, then 5, then 6. The scale does not explode because the total weight on the scale is never 2.
In the second test case, the total weight on the scale is 8, 9, 11, 14, then 18. It is never 3.
In the third test case, Phoenix must put the gold piece with weight 5 on the scale, and the scale will always explode.
在第一个测试用例中,凤凰首先将重量为 3 的金块放在天平上,然后放上重量为 2 的金块,最后放上重量为 1 的金块。此时天平上的总重量依次为 3、5、6。天平不会爆炸,因为天平上的总重量从未等于 2。
在第二个测试用例中,天平上的总重量依次为 8、9、11、14、18。其值从未等于 3。
在第三个测试用例中,凤凰必须将重量为 5 的金块放在天平上,此时天平总会爆炸。
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