题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
import java.util.Iterator; import java.util.Scanner; import java.util.TreeSet; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); String s = new StringBuilder(in.nextLine()).reverse().toString(); char[] a = s.toCharArray(); char[] b = new char[s.length()]; b[0] = a[0]; char c; int z = 1; int zhis = 0; for (int i = 1; i < s.length(); i++) { c = a[i]; for (int j = 0; j < z; j++) { if (c == b[j]) { zhis = 1; break; } } if (zhis == 0) { b[z] = c; z++; } zhis = 0; } String str = String.valueOf(b); Integer i = Integer.parseInt(str.trim()); System.out.println(i); } }