0747-Largest-Number-At-Least-Twice-of-Others 0752-Open-the-Lock 0765-Couples-Holding-Hands 0766-Toeplitz-Matrix 0771-Jewels-and-Stones 0772-Basic-Calculator-III 0780-Reaching-Points 0781-Rabbits-in-Forest 0783-Minimum-Distance-Between-BST-Nodes 0784-Letter-Case-Permutation 0785-Is-...
696. Count Binary Substrings # 题目 # Give a string s, count the number of non-empty (contiguous) substrings that have the same number of 0’s and 1’s, and all the 0’s and all the 1’s in these substrings are grouped consecutively. Substrings that
Given an integer arraynums, return the number of range sums that lie in[lower, upper]inclusive. Range sumS(i, j)is defined as the sum of the elements innumsbetween indicesiandj(i≤j), inclusive. Note: A naive algorithm ofO(n2) is trivial. You MUST do better than that. Example: Give...
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