842. Split Array into Fibonacci Sequence —— weekly contest 86

题目链接：https://leetcode.com/problems/split-array-into-fibonacci-sequence/description/

占坑。

string 的数值转换函数（c++11）介绍 ：https://blog.csdn.net/calmreason/article/details/41204211

答案可参考：https://leetcode.com/problems/split-array-into-fibonacci-sequence/discuss/133925/C++-DFS-backtracking-6ms