Submission #7475480

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Source Code Expand

import java.util.*;

public class Main {

  public static void main (String[] args) {

    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();

    int[] a = new int[N];

    for (int i = 0; i < N; i++) {
      a[i] = sc.nextInt();
    }

    sc.close();

    HashMap<Integer, Integer> hashMap = new HashMap<>();

    hashMap.put(a[0] * 2,1);

    int count = 1;

    for (int i = 1; i < N; i++) {
      if (!(hashMap.containsKey(a[i]))){
        count++;
      } 
      hashMap.put(a[i] * 2, 1);
    }

    System.out.println(count);

  }

}

Submission Info

Judge Result