C. 777.

(5 points)

Deadline expired.

Statistics on problem C. 777. 390 students sent a solution. 5 points: 106 students. 4 points: 99 students. 3 points: 74 students. 2 points: 28 students. 1 point: 42 students. 0 point: 34 students. Unfair, not evaluated: 7 solutions.