题解 | #查找兄弟单词#
查找兄弟单词
http://www.nowcoder.com/practice/03ba8aeeef73400ca7a37a5f3370fe68
import java.util.Scanner; import java.util.*; // 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); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNextLine()){ // 注意 while 处理多个 case String lineStr = in.nextLine(); String[] lineArr = lineStr.split(" "); int n = Integer.parseInt(lineArr[0]); int k = Integer.parseInt(lineArr[lineArr.length-1]); String target = lineArr[lineArr.length-2]; List<String> list = new ArrayList<>(n); for(int i=1; i<=n; i++){ if(isBrother(target, lineArr[i])){ list.add(lineArr[i]); } } Collections.sort(list); System.out.println(list.size()); if(list.size() > k){ System.out.println(list.get(k-1)); } } } private static boolean isBrother(String x, String y){ if(x.equals(y)){ return false; } if(x.length() != y.length()){ return false; } ArrayList<String> xArr = new ArrayList<>(); ArrayList<String> yArr = new ArrayList<>(); for(int i=0; i<x.length(); i++){ xArr.add(String.valueOf(x.charAt(i))); yArr.add(String.valueOf(y.charAt(i))); } Collections.sort(xArr); Collections.sort(yArr); for(int i=0; i<xArr.size(); i++){ if(!xArr.get(i).equals(yArr.get(i))){ return false; } } return true; } }