class Solution {
public:
    vector<vector<int> > findContinuousSequence(int sum) {
        vector<vector<int>> res;
        for (int i = 1, j = 1, s = 1; i <= sum / 2 + 1; i ++ )
        {
            while (s < sum) j ++ , s += j;
            if (s == sum && j > i)
            {
                vector<int> line;
                for (int k = i; k <= j; k ++ ) line.push_back(k);
                res.push_back(line);
            }
            s -= i;
        }
        return res;
    }
};