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  1. import java.io.BufferedReader;
  2. import java.io.InputStreamReader;
  3. import java.util.Map;
  4. import java.util.Scanner;
  5. import java.util.TreeMap;
  6.  
  7. public class Main {
  8.     public static void main(String[] args) throws Exception{
  9.         Scanner sc = new Scanner(System.in);
  10.         int m = sc.nextInt();
  11.         int n = sc.nextInt();
  12.         int[] nums = new int[m];
  13.         for(int i = 0; i < m; i++){
  14.             nums[i] = sc.nextInt();
  15.         }
  16.         TreeMap<Integer, Integer> blackBox = new TreeMap<>();
  17.         blackBox.put(Integer.MAX_VALUE, 1);
  18.         int size = 1;
  19.         int curKey = Integer.MAX_VALUE;
  20.         int curValue = 1;
  21.         int curPosition = 0;
  22.         for(int i = 0; i < n; i++){
  23.             int req = sc.nextInt();
  24.             for(int j = size - 1; j < req; j++){
  25.                 if (blackBox.containsKey(nums[j])) {
  26.                     blackBox.put(nums[j], blackBox.get(nums[j]) + 1);
  27.                     if (curKey == nums[j]) {
  28.                         curValue++;
  29.                     }
  30.                 }
  31.                 else {
  32.                     blackBox.put(nums[j], 1);
  33.                 }
  34.                 if(nums[j] < curKey) {
  35.                     if (curPosition == 0) {
  36.                         Map.Entry<Integer, Integer> curEnrty= blackBox.lowerEntry(curKey);
  37.                         curKey = curEnrty.getKey();
  38.                         curValue = curEnrty.getValue();
  39.                         curPosition = curValue - 1;
  40.                     }
  41.                     else {
  42.                         curPosition--;
  43.                     }
  44.                 }
  45.             }
  46.             size = req + 1;
  47.             System.out.println(curKey);
  48.             if (curPosition == curValue - 1) {
  49.                  Map.Entry<Integer, Integer> curEnrty = blackBox.higherEntry(curKey);
  50.                 curKey = curEnrty.getKey();
  51.                 curValue = curEnrty.getValue();
  52.                 curPosition = 0;
  53.             }
  54.             else {
  55.                 curPosition++;
  56.             }
  57.         }
  58.     }
  59. }
Runtime error #stdin #stdout #stderr 0.12s 2184192KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.util.NoSuchElementException
	at java.util.Scanner.throwFor(Scanner.java:862)
	at java.util.Scanner.next(Scanner.java:1485)
	at java.util.Scanner.nextInt(Scanner.java:2117)
	at java.util.Scanner.nextInt(Scanner.java:2076)
	at Main.main(Main.java:10)
https://ideone.com/Jv9ZXM
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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