package array;

public class FindMissingNumber {
  public int findNumber(int[] arr, int[] copy) {
    int sum = 0;
    for (int num : arr) {
      sum += num;
    }

    for (int num : copy) {
      sum -= num;
    }

    return sum;
  }
}

@@ -9,16 +9,116 @@
 array;%0A%0A
+/**%0A * Question: http://www.geeksforgeeks.org/?p=146802%0A * %0A * @author Sudharsanan Muralidharan%0A */%0A
 public c

Add question link