400. Nth Digit 第N位
阿新 • • 發佈:2017-07-19
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Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ...
Note:
n is positive and will fit within the range of a 32-bit signed integer (n < 231).
Example 1:
Input:3Output:3
Example 2:
Input:11Output:0Explanation:The 11th digit of the sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... is a 0, which is part of the number 10.
給定一個無窮整數序列1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ... 求序列的第n位數字。
123456789101112 | class Solution( object ): def findNthDigit( self , n): """ :type n: int :rtype: int """ n - = 1 for digits in range ( 1 , 11 ): first = 10 * * (digits - 1 ) if n < 9 * first * digits: return int ( str (first + n / digits)[n % digits]) n - = 9 * first * digits |
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400. Nth Digit 第N位