Printing Sequences

시간 제한2초메모리 제한2048 MB

문제

Bessie is learning to code using a simple programming language. She first defines a valid program, then executes it to produce some output sequence.

Defining:

  • A program is a nonempty sequence of statements.
  • A statement is either of the form "PRINT $c$" where $c$ is an integer, or "REP $o$", followed by a program, followed by "END," where $o$ is an integer that is at least 1.

Executing:

  • Executing a program executes its statements in sequence.
  • Executing the statement "PRINT $c$" appends $c$ to the output sequence.
  • Executing a statement starting with "REP $o$" executes the inner program a total of $o$ times in sequence.

An example of a program that Bessie knows how to write is as follows.

REP 3
    PRINT 1
    REP 2
        PRINT 2
    END
END

The program outputs the sequence $[1,2,2,1,2,2,1,2,2]$.

Bessie wants to output a sequence of $N$ ($1 \le N \le 100$) positive integers. Elsie challenges her to use no more than $K$ ($1 \le K \le 3$) "PRINT" statements. Note that Bessie can use as many "REP" statements as she wants. Also note that each positive integer in the sequence is no greater than $K$.

For each of $T$ ($1 \le T \le 100$) independent test cases, determine whether Bessie can write a program that outputs some given sequence using at most $K$ "PRINT" statements.

입력

The first line contains $T$.

The first line of each test case contains two space-separated integers, $N$ and $K$.

The second line of each test case contains a sequence of $N$ space-separated positive integers, each at most $K$, which is the sequence that Bessie wants to produce.

출력

For each test case, output "YES" or "NO" (case sensitive) on a separate line.