Steward

分享是一種喜悅、更是一種幸福

程式語言 - LeetCode - C++ - 386. Lexicographical Numbers

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題目：


解答：

class Solution {
public:
    vector<int> lexicalOrder(int n) {
        vector<int> ans;
        int cur = 1;

        for (int i = 0; i < n; ++i) {
            ans.push_back(cur);

            if (cur * 10 <= n) {
                cur *= 10;
            }
            else {
                while (cur % 10 == 9 || cur + 1 > n) {
                    cur /= 10;
                }
                cur += 1;
            }
        }

        return ans;
    }
};