Problem2160--Square string

2160: Square string

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 10Submit Num: 23Statistics

Description

Output

Sample Input Copy 

10
a
aa
aaa
aaaa
abab
abcabc
abacaba
xxyy
xyyx
xyxy

Sample Output Copy 

NO
YES
NO
YES
YES
YES
NO
NO
NO
YES

Source/Category

CodeForces 
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