C. 770.

(5 points)

Deadline expired.

Statistics on problem C. 770. 562 students sent a solution. 5 points: 237 students. 4 points: 40 students. 3 points: 24 students. 2 points: 116 students. 1 point: 103 students. 0 point: 30 students. Unfair, not evaluated: 12 solutions.