这个问题的解决办法在网上有很多种办法，但是对于我来说都不使用，所以查看自己的studio的log文件，如果你是跟我一样的问题，可以尝试我这种办法，

Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,000) on the same number line. Farmer John has two modes of transportation: walking and teleporting.

测量字典中，键值对的个数

index和count与字符串中的用法相同