一个n看他是不是回文数
字符串(最多10000000000000000000000000000)n。
是回文数吗? 是输出YES,不是输出NO
3
GDSH
121
3565
NO
YES
NO
2
51532124542115215
0..0
NO
YES
回文数指左右对称的数,如:959,o.o
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