题解 | #提取不重复的整数#

import Foundation

while let line = readLine() {
    var res = 0
    var number = Int(line)!
    //! 需要过滤相同元素
    var hash = Set<Int>()
    while number != 0 {
        let temp = number % 10
    
        if hash.insert(temp).inserted {
            res = res * 10
            res += temp
        }
     
        number = number / 10 
   }

    print(res)
}