B. 3670.

(5 points)

Deadline expired.

Statistics on problem B. 3670. 76 students sent a solution. 5 points: Bednay Dezső, Birkus Róbert, Czank Tamás, Estélyi István, Jankó Zsuzsanna, Lorántfy Bettina, Sándor Ágnes Petra. 4 points: 56 students. 3 points: 3 students. 2 points: 1 student. 1 point: 1 student. 0 point: 4 students. Unfair, not evaluated: 4 solutions.