Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may be large, return the answer modulo 109 + 7. Explanation: Subarrays ...
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consists of two lines. The first line of each test case is N and S, where N is ...
Abstract: The deployment of extremely large-scale multiple-input multiple-output (XL-MIMO) significantly enlarges the near-field region. Accurate near-field channel state information estimation is of ...
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