IOM 2020, Блиц — Задача 79

The Blitz-contest of IOM-2020

Условие

Network graph of 11 nodes (circles) joined by lines; one node on the left is filled red, the others are white; no node is labelled.

The picture describes the computer network with 11 computers which names are A,B,C,…,KA, B, C, \dots, K. In the network you can find these four sequences of the adjacent computers:

  1. IDCJG
  2. BDFGHK
  3. JKAH
  4. GCBDEF

What is the name of the red computer?

Отговори

Решение

Внимание: Непълно решение

The source contains only the answer key, no worked solution.

Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf