[A] Alex’s Game(I)
- 时间限制: 1000 ms 内存限制: 65535 K
- 问题描述
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Alex likes to play with one and zero!One day he gets an empty string.So our cute boy wants to add one and zero in it. Every time he will add ‘01’in the string at any position and then get a new string.For example:if the string is “01” now ,he can get “0101” or “0011,Now give you a string that is Alex has get,you need to answer whether the string is legal?
- 输入
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First is a integer n(n<=100)
Next contains n lines .Every line is a string whose legth is no more than 1000. - 输出
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For each case output "YES" in a single line if it’s legal.
Or you need to output “NO”; - 样例输入
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3 0101 0110 0011
- 样例输出
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YES NO YES
- 提示
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无
- 来源
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Tisuama@WUST
- 操作
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