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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main(String[] args) {
  11.         Scanner scanner = new Scanner(System.in);
  12.         int q= scanner.nextInt();
  13.         int n = scanner.nextInt();
  14.  
  15.         int[] nums = new int[n];
  16.         int []quer =new int[q];
  17.         for (int i = 0; i < q; i++) {
  18.             quer[i] = scanner.nextInt();
  19.         }
  20.  
  21.         for (int i = 0; i < n; i++) {
  22.             nums[i] = scanner.nextInt();
  23.         }
  24.         List<Integer> res = countFreq(nums,quer);
  25.         System.out.println(res);
  26.     }
  27.  
  28.     public static List<Integer> countFreq(int []nums,int []q){
  29.     	Map<Integer,Integer> map = new HashMap<>();
  30.     	List<Integer> list =new ArrayList<>();
  31.         for(int num : nums){
  32.            map.put(num,map.getOrDefault(num,0)+1);
  33.         }
  34.         for(int ele : q ){
  35.         	if(map.containsKey(ele)){
  36.         		list.add(map.get(ele));
  37.         	}else{
  38.         		list.add(0);
  39.         	}
  40.         }
  41.         return list;
  42.     }
  43. }
Success #stdin #stdout 0.1s 54468KB
comments (?)
stdin 
4 7
1 2 3 4
1 2 1 3 3 2 6
stdout 
[2, 2, 2, 0]
https://ideone.com/xZy4xh
language:
Java (HotSpot 12)
created:
26 days ago
visibility:
public

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