Segment Tree Lazy
Resouce : https://www.youtube.com/watch?v=xuoQdt5pHj0&fbclid=IwAR3iKBFDCWddsYw1FMxqNkz5hwG_V6ddSKIgyTYSQyEFthkV_IGlV0vp1yw
https://ideone.com/S6yxAe
Practice : https://codeforces.com/edu/course/2