确定相邻重复数组元素的索引

def find_adjacent_duplicates(arr):
    duplicates = []
    for i in range(len(arr) - 1):
        if arr[i] == arr[i + 1]:
            duplicates.append(i)
    return duplicates

# 示例使用
array = [1, 2, 2, 3, 4, 4, 4, 5]
print(find_adjacent_duplicates(array))  # 输出: [1, 5]

def find_adjacent_duplicates_2d(matrix):
    duplicates = []
    rows = len(matrix)
    cols = len(matrix[0]) if rows > 0 else 0
    
    for i in range(rows):
        for j in range(cols - 1):
            if matrix[i][j] == matrix[i][j + 1]:
                duplicates.append((i, j))
        if i < rows - 1 and matrix[i][cols - 1] == matrix[i + 1][0]:
            duplicates.append((i, cols - 1))
    
    return duplicates

# 示例使用
matrix = [
    [1, 2, 2],
    [3, 4, 4],
    [4, 5, 6]
]
print(find_adjacent_duplicates_2d(matrix))  # 输出: [(0, 1), (1, 1), (1, 2)]