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Saturday 16 July 2022

[Solution] Difference Operations Codeforces Solution



A. Difference Operations
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

You are given an array a consisting of n positive integers.

You are allowed to perform this operation any number of times (possibly, zero):

  • choose an index i (2in), and change ai to aiai1.

Is it possible to make ai=0 for all 2in?

Input

The input consists of multiple test cases. The first line contains a single integer t (1t100)  — the number of test cases. The description of the test cases follows.

The first line contains one integer n (2n100) — the length of array a.

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The second line contains n integers a1,a2,,an (1ai109).

Output

For each test case, print "YES" (without quotes), if it is possible to change ai to 0 for all 2in, and "NO" (without quotes) otherwise.

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You can print letters in any case (upper or lower).

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