很聪明的解法

https://leetcode.com/problems/patching-array/?tab=Description

好题目啊，下面的解法绝顶聪明：

https://discuss.leetcode.com/topic/35494/solution-explanation

int minPatches(vector<int>& nums, int n) {
    long miss = 1, added = 0, i = 0;
    while (miss <= n) {
        if (i < nums.size() && nums[i] <= miss) {
            miss += nums[i++];
        } else {
            miss += miss;
            added++;
        }
    }
    return added;
}