Last Year's Substring

TimeLimit:2000MS  MemoryLimit:256MB
64-bit integer IO format:%I64d
未提交 | 登录后收藏
Problem Description

Polycarp has a string s[1 …… n] of length n consisting of decimal digits. Polycarp performs the following operation with the string s no more than once (i.e. he can perform operation 0 or 1 time):

  • Polycarp selects two numbers i and j (1 ≤ i ≤ j ≤ n) and removes characters from the s string at the positions i, i+1, i+2, ……, j (i.e. removes substring s[i …… j]). More formally, Polycarp turns the string s into the string s_1 s_2 …… s_{i-1} s_{j+1} s_{j+2} …… s_{n}.

For example, the string s = "20192020" Polycarp can turn into strings:

  • "2020" (in this case (i, j)=(3, 6) or (i, j)=(1, 4));

  • "2019220" (in this case (i, j)=(6, 6));

  • "020" (in this case (i, j)=(1, 5));

  • other operations are also possible, only a few of them are listed above.

Polycarp likes the string "2020" very much, so he is wondering if it is possible to turn the string s into a string "2020" in no more than one operation? Note that you can perform zero operations.

Input

The first line contains a positive integer t (1 ≤ t ≤ 1000 ) — number of test cases in the test. Then t test cases follow.

The first line of each test case contains an integer n (4 ≤ n ≤ 200) — length of the string s. The next line contains a string s of length n consisting of decimal digits. It is allowed that the string s starts with digit 0.

Output

For each test case, output on a separate line:

  • "YES" if Polycarp can turn the string s into a string "2020" in no more than one operation (i.e. he can perform 0 or 1 operation);

  • "NO" otherwise.

You may print every letter of "YES" and "NO" in any case you want (so, for example, the strings yEs, yes, Yes and YES will all be recognized as positive answer).

SampleInput
6
8
20192020
8
22019020
4
2020
5
20002
6
729040
6
200200
SampleOutput
YES
YES
YES
NO
NO
NO
Note

In the first test case, Polycarp could choose i=3 and j=6.

In the second test case, Polycarp could choose i=2 and j=5.

In the third test case, Polycarp did not perform any operations with the string.

Submit
题目统计信息详细
总AC数10
通过人数9
尝试人数9
总提交量13
AC率69.23%
AC该题后可以添加标签
贴完标签可以获得20ACB。
并且可以获得本题所有提交代码查看权限。
点击标题可以显示标签。
如果你还没认真思考过这题,请不要查看标签
如果您已经通过了该题,请务为该题贴上标签

T^T Online Judge

[BUG反馈] [FAQ] [闽ICP备17026590号-1]
当前版本:3.24 系统时间: