P21351 [CodeChef] PERFCONT
普及-
题目描述

Chef wants to organize a contest. Predicting difficulty levels of the problems can be a daunting task. Chef wants his contests to be balanced in terms of difficulty levels of the problems.
Assume a contest had total P participants. A problem that was solved by at least half of the participants (i.e. P / 2 (integer division)) is said to be cakewalk difficulty. A problem solved by at max P / 10 (integer division) participants is categorized to be a hard difficulty.
Chef wants the contest to be balanced. According to him, a balanced contest must have exactly 1 cakewalk and exactly 2 hard problems. You are given the description of N problems and the number of participants solving those problems. Can you tell whether the contest was balanced or not?

-----Input-----
The first line of the input contains an integer T denoting the number of test cases.
The first line of each test case contains two space separated integers, N, P denoting the number of problems, number of participants respectively.
The second line contains N space separated integers, i-th of which denotes number of participants solving the i-th problem.

-----Output-----
For each test case, output "yes" or "no" (without quotes) denoting whether the contest is balanced or not.

-----Constraints-----
- 1 ≤ T, N ≤ 500
- 1 ≤ P ≤ 108
- 1 ≤ Number of participants solving a problem ≤ P

-----Subtasks-----
- Subtask #1 (40 points): P is a multiple of 10
- Subtask #2 (60 points): Original constraints

-----Example-----
Input
6
3 100
10 1 100
3 100
11 1 100
3 100
10 1 10
3 100
10 1 50
4 100
50 50 50 50
4 100
1 1 1 1

Output
yes
no
no
yes
no
no

-----Explanation-----
Example case 1.: The problems are of hard, hard and cakewalk difficulty. There is 1 cakewalk and 2 hard problems, so the contest is balanced.
Example case 2.: The second problem is hard and the third is cakewalk. There is 1 cakewalk and 1 hard problem, so the contest is not balanced.
Example case 3.: All the three problems are hard. So the contest is not balanced.
Example case 4.: The problems are of hard, hard, cakewalk difficulty. The contest is balanced.
Example case 5.: All the problems are cakewalk. The contest is not balanced.
Example case 6.: All the problems are hard. The contest is not balanced.

输入格式

见题面

输出格式

见题面

样例输入
['6', '3 100', '10 1 100', '3 100', '11 1 100', '3 100', '10 1 10', '3 100', '10 1 50', '4 100', '50 50 50 50', '4 100', '1 1 1 1']
样例输出
['yes', 'no', 'no', 'yes', 'no', 'no']