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No.3702 Don't Wanna Fail! (Don't Wanna Fail!)

レベル : / AI推定難易度 : 101 / 実行時間制限 : 1ケース 2.000秒 / メモリ制限 : 1024 MB / 標準ジャッジ問題
タグ : （解説公開後に AC するまで非表示） / 解いたユーザー数 39
作問者 : Rapca1256 / テスター : tomorunn
お気に入りにしたユーザー ProblemId : 13979 / 自分の提出
問題文最終更新日: 2026-09-10 17:28:37
This statement was translated by AI (claude-opus-5-5, effort medium) and may contain errors or differ in nuance from the original. The original statement takes precedence. Back to the original
JOI1次風非公式模試 (Suken Programming Contest 007) (順位表) の他の問題:

Problem Statement

Suken, a student at Kowasugi High School, is about to take $N$ tests.
Since Suken can see the future, he looked at the score of each test and found that his score on the $i$-th test is $A_i$ points.
Suken is currently on the verge of repeating a year: if he gets even one failing score, that is, a score below $30$ points, he is certain to repeat the year.

However, under the school's terrifying policy, if he does not take at least $K$ tests, he will repeat the year at that point.
Given that he may skip any number of tests, that is, ignore their scores, determine whether he can avoid repeating the year.

Input

$N\ K$
$A_1\ A_2\ A_3\ \cdots\ A_N$
  • $1 \le K \le N \le 100$
  • $0 \le A_i \le 100$
  • All input values are integers.

Output

Print Yes if there is a way of taking the tests such that he does not repeat the year, and No otherwise.
Do not print anything other than the answer. (Do not print messages such as input prompts either.)
For the answer format, you may refer to practice problems and their sample solutions, but note that no links are provided.

Sample

Sample 1
Input
5 3
49 24 14 83 30
Output
Yes

If he does not take the $2$nd and $3$ subjects, all the subjects he takes have scores of $30$ points or more.

Sample 2
Input
5 5
0 0 0 0 0
Output
No

Sample 3
Input
7 4
29 83 43 12 30 0 5
Output
No

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