def search_insert_position(nums, target):
    left, right = 0, len(nums) - 1

    while left <= right:
        mid = (left + right) // 2

        if nums[mid] == target:
            return mid  # Target found
        elif nums[mid] < target:
            left = mid + 1
        else:
            right = mid - 1

    return left  # The position where the target should be inserted

# Example usage
nums = [1, 3, 5, 6]
target = 5
print(search_insert_position(nums, target))  # Output: 2

target = 2
print(search_insert_position(nums, target))  # Output: 1

target = 7
print(search_insert_position(nums, target))  # Output: 4