leetcode 分治 beautiful array

题目链接

typedef vector<int> vi;
class Solution
{public:vi beautifulArray(int n){if (n == 1)return vi(1, 1);vi left = beautifulArray((n + 1) / 2);vi right = beautifulArray(n / 2);vi res;res.clear();for (auto ele : left)res.push_back(2 * ele - 1);for (auto ele : right)res.push_back(2 * ele);return res;}
};

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