Two-pass approach used to solve the problem #204
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Note: Assume ‘0’ as the invalid number and all others as a valid number. The sequence of the valid numbers is present in the same order. Example: Input: arr[] = [2, 2, 0, 4, 0, 8] Output: [4, 4, 8, 0, 0, 0] Explanation: At index 0 and 1 both the elements are the same. So, we will change the element at index 0 to 4 and the element at index 1 is 0 then we will shift all the zeros to the end of the array. So, the array will become [4, 4, 8, 0, 0, 0].Input: arr[] = [0, 2, 2, 2, 0, 6, 6, 0, 0, 8] Output: [4, 2, 12, 8, 0, 0, 0, 0, 0, 0] Explanation: At index 5 and 6 both the elements are the same. So, we will change the element at index 5 to 12 and the element at index 6 is 0. We will change the element at index 1 to 4 and the element at index 2 is 0. Then we shift all the zeros to the end of the array. So, array will become [4, 2, 12, 8, 0, 0, 0, 0, 0, 0]. Expected Time Complexity: O(n) Expected Auxiliary Space: O(n) Constraints: 1 ≤ arr.size() ≤ 105 1 ≤ arr[i] ≤ 106
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Note:
Assume ‘0’ as the invalid number and all others as a valid number. The sequence of the valid numbers is present in the same order.
Example:
Input: arr[] = [2, 2, 0, 4, 0, 8]
Output: [4, 4, 8, 0, 0, 0]
Explanation: At index 0 and 1 both the elements are the same. So, we will change the element at index 0 to 4 and the element at index 1 is 0 then we will shift all the zeros to the end of the array. So, the array will become [4, 4, 8, 0, 0, 0].Input: arr[] = [0, 2, 2, 2, 0, 6, 6, 0, 0, 8] Output: [4, 2, 12, 8, 0, 0, 0, 0, 0, 0]
Explanation: At index 5 and 6 both the elements are the same. So, we will change the element at index 5 to 12 and the element at index 6 is 0. We will change the element at index 1 to 4 and the element at index 2 is 0. Then we shift all the zeros to the end of the array. So, array will become [4, 2, 12, 8, 0, 0, 0, 0, 0, 0]. Expected Time Complexity: O(n)
Expected Auxiliary Space: O(n)
Constraints:
1 ≤ arr.size() ≤ 105
1 ≤ arr[i] ≤ 106
Description
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Fixes: #[issue_number] (replace with the issue number, if applicable)
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