Please give some online judge problems in which prefix sum( also known as cumulative sum) technique is useful. and freuqancy array
Please give some online judge problems in which prefix sum( also known as cumulative sum) technique is useful. and freuqancy array
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can you tell me how to approach RANGESUM using prefix array. We're adding a new element every time here, we'll have to calculate prefix sum every time.
Store the array as its reverse and then use prefix sum.
try edu