返回排序数组中每个数字的最后一次相遇的函数

def find_last_occurrences(arr):
    last_occurrences = {}
    for i, num in enumerate(arr):
        last_occurrences[num] = i
    return last_occurrences

# 示例用法
arr = [1, 2, 2, 3, 3, 3, 4, 4, 5]
result = find_last_occurrences(arr)
print(result)  # 输出: {1: 0, 2: 2, 3: 5, 4: 7, 5: 8}

def find_last_occurrences(arr):
    if not arr:
        return {}
    last_occurrences = {}
    for i, num in enumerate(arr):
        last_occurrences[num] = i
    return last_occurrences

def find_last_occurrences(arr):
    last_occurrences = {}
    for i, num in enumerate(arr):
        last_occurrences[num] = i
    return last_occurrences