题目描述

blablabla

样例

blablabla

算法1(双指针)

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