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並前往https://leetcode.com/problems/count-and-say/discuss/551945/C%2B%2B-Easy-solution-using-2D-vectors

C++ Easy solution using 2D vectors (with explanation)

string countAndSay(int n) { n = n-1; vector<vector<int>> res(30); //2D vector to store the series res[0].push_back(1); //1st element int freq = 0; ...

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