題目：
Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 246913578, which happens to be another 9-digit number consisting exactly the numbers from 1 to 9, only in a different permutation. Check to see the result if we double it again!
Now you are suppose to check if there are more numbers with this property. That is, double a given number with k digits, you are to tell if the resulting number consists of only a permutation of the digits in the original number.
輸入格式:
Each input contains one test case. Each case contains one positive integer with no more than 20 digits.
輸出格式:
For each test case, first print in a line “Yes” if doubling the input number gives a number that consists of only a permutation of the digits in the original number, or “No” if not. Then in the next line, print the doubled number.
輸入樣例:
1234567899
輸出樣例:
Yes
2469135798
【題目大意】：
數字123456789是一個9位數的數字，完全由1到9的數字組成，沒有重複。把它翻倍，就得到246913578，它正好是另一個9位數的數字，恰好由1到9這兩個數字組成，只是排列方式不同。再翻一倍看看結果!
要檢查是否有更多的數字具有這個性質。也就是說，將一個給定的數字乘以兩倍，得到的數字是否只包含原數字中數字的排列。
思路：