Maxim is a big fan of all kinds of games. This time he is playing a game called "Minecraft".

This time he came up with a great idea to build a huge target and practice archery. According to Maxim's plan, the target will look like a square with an even side length $$$x$$$, and each inner layer is painted either white or red, with the colors alternating (for better understanding, see the picture):

Example of an $$$8 \times 8$$$ target.

Example of a $$$4 \times 4$$$ target.

Maxim also wants to make this target out of wool, but he doesn't have a lot of red wool, specifically $$$n$$$ blocks. Help Maxim figure out the maximum side length $$$x$$$ his target can have!