Hello friends can someone tell me how to approach these problems? I participated in this practice round in the morning and could not solve these 3 problems. Can someone tell me the approach to solve these problems. Thanks in advance.

@vijju123 @taran_1407 @vivek_1998299 @meooow @john_smith_3 @aryanc403 @vbt_95

[Problem 1 ][1] [Problem 2][2] [Problem 3][3]

**Note** Contest is over so we can have a discussion over the approach used or can be used.

[1]: https://drive.google.com/open?id=1v3ULoaTbtcqKQk-_ysGtOSo82K2Ha0CJ

[2]: https://drive.google.com/open?id=1GHKmT8YGfU8NE_vCJq7ZpNBtQsCd320k

[3]: https://drive.google.com/open?id=1JXahLgHhpyuSWoYwp9W_Ofm3wwho1keh