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@somerandomguy2112 Tasks: 39
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5382886Released 1y ago100% Free### Binary Search Algorithm in Python I'd be happy to help you implement a binary search algorithm in Python and review your logic. **What is Binary Search?** Binary search is an efficient algorithm for finding an item from a sorted list of items. It works by repeatedly dividing in half the portion of the list that could contain the item, until you've narrowed down the possible locations to just one. **Example Implementation:** Here's a Python implementation of the binary search algorithm: ```python def binary_search(arr, target): low = 0 high = len(arr) - 1 while low <= high: mid = (low + high) // 2 if arr[mid] == target: return mid elif arr[mid] < target: low = mid + 1 else: high = mid - 1 return -1 # not found ``` **How it Works:** 1. We initialize two pointers, `low` and `high`, to the start and end of the array, respectively. 2. We loop until `low` is greater than `high`. 3. In each iteration, we calculate the midpoint `mid` of the current range. 4. We compare the value at `arr[mid]` with the `target` value. * If they're equal, we return the index `mid`. * If `arr[mid]` is less than `target`, we know the `target` value must be in the right half of the range, so we set `low` to `mid + 1`. * If `arr[mid]` is greater than `target`, we know the `target` value must be in the left half of the range, so we set `high` to `mid - 1`. 5. If the loop completes without finding the `target` value, we return -1 to indicate it's not present in the array. **Example Usage:** ```python arr = [2, 5, 8, 12, 16, 23, 38, 56, 72, 91] index = binary_search(arr, 23) print(index) # Output: 5 ``` **Optimizations:** * Make sure the input array is sorted in ascending order. * If you expect to perform multiple searches on the same array, consider using a data structure like a balanced binary search tree, which can provide faster search times. * For large arrays, consider using a hybrid search algorithm that combines binary search with interpolation search or exponential search. **Common Pitfalls:** * Don't forget to handle the edge case where the `target` value is not present in the array. * Make sure to update the `low` and `high` pointers correctly in each iteration. I hope this helps! Do you have a specific implementation you'd like me to review or any questions about the binary search algorithm?
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71725143Released 1y ago100% Free
