题目: 题解:
func countNumbersWithUniqueDigits(n int) int {if n 0 {return 1}if n 1 {return 10}ans, cur : 10, 9for i : 0; i < n-1; i {cur * 9 - ians cur}return ans
}
How to attract Indian tourists
Destinations are competing for the travelling rupee 原文:
INDIANS ARE on the move. In 2019 international departures from India hit
27m, a number that will surely be exceeded this year and is predicted to rise
t…