Is It a Number

In some programming languages(like C/C++), we define numbers like this:

number -> digits optional_fraction optional_exponent
optional_fraction -> [empty] | .digits
optional_exponent -> [empty] | E digits | E - digits
digits -> digit | digits digit
digit -> [0-9]

Given a string, you have to tell whether it is a legal number.

The first line of input contains an integer T(1<=T<=100) which indicate the number of test cases. Then T test cases follow. Each test case contains one line. Each line contains a string whose length will not exceed 100.

Note: there are no spaces and tabs at the begin and the end of the string.

For each test case, you have to tell whether the string is a legal number. If it is a legal number, output "YES" in a single line, otherwise, output "NO" in a single line.

5
0123
123.456
0.456E-5
123 456
0.456EF

YES
YES
YES
NO
NO

Ignatius.L

HDU 2006-5 Programming Contest