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https://t.me/coderhelpp/9041 E. Flatten or Concatenate time limit per test3 seconds memory limit per test512 megabytes This is an interactive problem. While procrastinating at work, Dilhan the elf stumbled upon two arrays a and b . Initially, both of them consist of a single integer 2k (i.e., a=b=[2k] ), where k is a non-negative integer. Dilhan then applied the following two types of operations an arbitrary number of times (possibly zero), in any order: Flatten — Choose either a or b , and select any element x that is maximal within that array (x does not need to be maximal in the other array). Then, replace x with two copies of x2 in the same position. This operation can only be applied if x is even. Concatenate — Set both a and b to be a+b , where + denotes array concatenation. After performing these operations, Dilhan discards b , hides a from you, and challenges you to a game. Let n be the length of the hidden array a . You may make the following query: Choose an interval [l,r] (1≤l≤r≤n ), and Dilhan will tell you the sum al+al+1+⋯+ar . Determine the value of the maximum element of a by making at most 300 queries. Input Each test contains multiple test cases.