Mobile coding works. A laptop is faster for long sessions.
Problem
Check if a number is divisible by 3.
Input (from file `input.txt`):
- A single integer N (-100000 ≤ N ≤ 100000)
Output (to file `output.txt`):
- "YES" if divisible by 3, "NO" otherwise
Example
input.txt:
12
output.txt:
YES
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