Can anyone help me by providing resources for learning node and angular js from very begining to advanced?

Any one who has 1 year of experience in coding and willing to prepare together so that regularity can be maintained..if interested plz pm..

me

Codeforces

this problem tells to implement binary search..........i know binary search but i can not find any way how will i implement binary search in this problem to get the desired solution.

i am new in competative programming.what is the best site for practicing problems i topic wise