新文件:       solution_leecode/singlenumber.cpp
	修改:         solution_leecode/countandsay.cpp
	修改:         solution_leecode/palindrome.cpp
	修改:         solution_leecode/palindromenumber.cpp
	修改:         solution_leecode/reverseInterger.cpp
	修改:         solution_leecode/singlenumber.cpp
	修改:         solution_leecode/string2interger.cpp
	修改:         solution_leecode/symmetricTree.cpp