Prefix Sums and Difference Array: 20 minutes of EVERYTHING you need to know
In this video, I will explain everything about prefix sums (partial sums) and difference array. I will discuss prefix sums no 1, prefix sums no 2 (or difference array), 2D prefix sums, and the other sorts of prefix sum (partial sum). The solution for prefix sums has a close bond with dynamic programming. #competitiveprogramming #competitive_programming #Codeforces #codeforces_solution #atcoder #atcoder_solution #ioi #icpc 0:00 Intro 0:10 Prefix Sums No. 1 4:55 Prefix Sums No. 2 or Difference Array 11:18 Two Dimensional Prefix Sums No. 1 15:00 Two Dimensional Prefix Sums No. 2 16:37 Variants of Prefix Sums
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