IOM 2018, Блиц, английски — Задача 50

OLYMPIAD OF METROPOLISES. Moscow, September 3 · 3 септември 2018 г.

Условие

How many different paths are in the graph below which lead from AA to TT?

Directed graph with circled vertices A, B, C, D, E, F, G, H, K, M, N, P, Q, R, S and T; arrows lead from A on the left through the intermediate vertices to T on the right.

Отговори

Решение

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