查找表中的三个“特别号码”。
In given table of numbers find three numbers with these properties:
- all three numbers must be different,
- middle number must me average of other two numbers,
- distance between first and second number must be equal to
distance between second and third number,
(all three numbers may be in single row , or in single column, or may be laying on diagonal)
Find as many numbers as you can in 100 seconds.