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:
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/
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出处:细语呢喃 > leetcode Patching Array
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