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  1. import java.util.*;
  2.  
  3. class Ideone {
  4.     public static void main(String[] args) throws java.lang.Exception {
  5.         Scanner sc = new Scanner(System.in);
  6.         HashMap<Integer, Integer> map = new HashMap<>();
  7.  
  8.         int n = sc.nextInt();
  9.         int[] arr = new int[n];
  10.  
  11.         // Read array and populate the map
  12.         for (int i = 0; i < n; i++) {
  13.             arr[i] = sc.nextInt();
  14.             map.put(arr[i], map.getOrDefault(arr[i], 0) + 1);
  15.         }
  16.  
  17.         // Process queries
  18.         int q = sc.nextInt();
  19.         for (int i = 0; i < q; i++) {
  20.             int query = sc.nextInt();
  21.             int count = map.getOrDefault(query, 0);
  22.             System.out.println("count of query " + query + " is " + count);
  23.         }
  24.     }
  25. }
  26.  
Success #stdin #stdout 0.17s 58912KB
comments (?)
stdin
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5 
1 1 1 2 2
3
1
2
3
stdout
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count of query 1 is 3
count of query 2 is 2
count of query 3 is 0
https://ideone.com/t1bTZD
language:
Java (12.0.1)
created:
2 hours ago
visibility:
public

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