CF31A Worms Evolution

Professor Vasechkin is studying evolution of worms. Recently he put forward hypotheses that all worms evolve by division. There are $ n $ forms of worms. Worms of these forms have lengths $ a_{1} $ , $ a_{2} $ , ..., $ a_{n} $ . To prove his theory, professor needs to find 3 different forms that the length of the first form is equal to sum of lengths of the other two forms. Help him to do this.

The first line contains integer $ n $ ( $ 3

Output 3 distinct integers $ i $ $ j $ $ k $ ( $ 1