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Time limit 2000/4000/4000/4000 ms. Memory limit 65000/65000/65000/65000 Kb.
Difficulty Beta
Ladder is a set of cubes in one or more layers in which each over the top layer contains fewer blocks than the bottom. Count the number of ladders that can be built from N cubes. Enter At the entrance recorded the number N (1 ≤ N ≤ 100). Output Print the required number of ladders.
Для отправки решений необходимо выполнить вход. |