IncredibleThings

摘要： Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Note: num[i]存的是nums的前i-1个元素之和，反正前j个元素和减 阅读全文

摘要： Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. Example 1 Input: [3,0,1] Output: 阅读全文