Description: There are 2* n+1 integers, of which the number of n-different from each other, each have occurred twice, left a number appears only once. Please find out the number.
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File list (Check if you may need any files):
findSingle\FindSingle.java
..........\StringCompare.java
..........\TestBinaryTree.java
..........\TestPosibility.java
..........\TestReverseList.java
findSingle