leetcode Patching Array

题意：给定一个数组nums和一个数n，求添加最少的数使得[1,n]中的每个数都可以由数组中元素和组成用known_sum表示已知的连续和为[1,known_sum)，有了这个表示那就简单了：

nums[i] <= known_sum，更新已知范围为：[1,known_sum + nums[i] )

nums[i] > known_sum, 添加known_sum进数组才能达到最大的范围，所以已知范围更新为：[1,known_sum *2 )

class Solution {
public:int minPatches(vector<int>& nums, int n) {int cnt = 0, i = 0;for (long known_sum = 1; known_sum <= n;) {if (i < nums.size() && nums[i] <= known_sum) {known_sum += nums[i++];}else {known_sum <<= 1;cnt++;}}return cnt;}
};

本文是leetcode 330 Patching Array 的题解，更多题解可见

https://www.hrwhisper.me/leetcode-algorithm-solution/

本文由 hrwhisper 原创发布
出处：细语呢喃 > leetcode Patching Array
地址：https://www.hrwhisper.me/leetcode-patching-array/

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