[tutorial:1113A]↵
[tutorial:1113B]↵
[tutorial:1109A]↵
[tutorial:1109B]↵
[tutorial:1109C]↵
[tutorial:1109D]↵
[tutorial:1109E]↵
[tutorial:1109F]Author's solution](https://ideone.com/hxF5jk)↵
[tutorial:1113B]↵
[Author's solution](https://ideone.com/mkondU)↵
[tutorial:1109A]↵
[Author's solution](https://ideone.com/Jf8Za8)↵
[tutorial:1109B]↵
[Author's solution](https://ideone.com/5XG0Bp)↵
[Solution of bonus task](https://ideone.com/mwSGec)↵
[tutorial:1109C]↵
[Author's solution](https://ideone.com/2jVhHb)↵
[tutorial:1109D]↵
[Author's solution](https://ideone.com/vbiC9L)↵
[tutorial:1109E]↵
[Author's solution](https://ideone.com/wmOHHu)↵
[tutorial:1109F]↵
[Author's solution](https://ideone.com/GWzJof)
[
[tutorial:1109A]↵
[tutorial:1109B]↵
[tutorial:1109C]↵
[tutorial:1109D]↵
[tutorial:1109E]↵
[tutorial:1109F]
[tutorial:1113B]↵
[Author's solution](https://ideone.com/mkondU)↵
[tutorial:1109A]↵
[Author's solution](https://ideone.com/Jf8Za8)↵
[tutorial:1109B]↵
[Author's solution](https://ideone.com/5XG0Bp)↵
[Solution of bonus task](https://ideone.com/mwSGec)↵
[tutorial:1109C]↵
[Author's solution](https://ideone.com/2jVhHb)↵
[tutorial:1109D]↵
[Author's solution](https://ideone.com/vbiC9L)↵
[tutorial:1109E]↵
[Author's solution](https://ideone.com/wmOHHu)↵
[tutorial:1109F]↵
[Author's solution](https://ideone.com/GWzJof)