Min Points to Create a Line Chart

You task is to build a line chart for the server load change through time, given a sequence of load rate data. Each data point is a pair of numerics [int timestamp, double rate]. The timestamp starts from 0 and naturally increments by 1 per data point.
Find out the minimum number of points necessary for the line chart. Return a list of significant points in the chart...



Get one-to-one training from Google Facebook engineers

Top-notch Professionals

Learn from Facebook and Google senior engineers interviewed 100+ candidates.
Most recent interview questions and system design topics gathered from aonecode alumnus.
One-to-one online classes. Get feedbacks from real interviewers.

Customized Private Class

Already a coding expert? - Advance straight to hard interview topics of your interest.
New to the ground? - Develop basic coding skills with your own designated mentor.
Days before interview? - Focus on most important problems in target company question bank.