Submission #7153686

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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();

    int count = 1;

    int[] check = new int[200010];

    check[a[0]*2] = 1;

    for (int i = 1; i < N; i++) {
      if (check[a[i]] == 0) {
        count++;
      }
      check[a[i]*2] = 1;
    }

    System.out.println(count);

  }

}

Submission Info

Judge Result