IAO 2002, Теория, Група β, английски — Задача 3
Theoretical round. Problems to solve — Group B · 22 октомври 2002 г.
Бележки от източника
The supplied key refers to a drawing for problem 2 but contains none. The B4 key prints “5 parameters” before concluding 16; the printed wording is retained. The printed B5 formula V_per·a(1−e)/2 and its numerical results are retained without correction.
Условие
We have received a message from Extraterrestrial Intelligence. Please decode it. The message is:
10001100010011001001001001100111100100110010010010011001001000110
(This is the whole message, not part of it.)
Решение
There are 65 signs in the message. Having presented it as the table (the alternative versions are not possible), we receive two possible solutions:
5 columns, 13 lines
10001 10001 00110 01001 00100 11001 11100 10011 00100 10010 01100 10010 00110
13 columns, 5 lines
1000110001001 1001001001001 1001111001001 1001001001001 1001001000110
After replacement of units on signs, and zero on gaps, the second version yields the quite understandable message:
“International Astronomical Union” or “1 astronomical unit”.
Оригинал в Архива: betatheo.jpg · официални решения: commonsol.jpg · допълнителни данни: alphasol.jpg · допълнителни данни: betatheodata.jpg · допълнителни данни: betasol.jpg