2021-09-16:給定一個僅包含數字 2-9 的字串,返回所有它能表示
Println(ret)}var phone = [][]byte{ {‘a’, ‘b’, ‘c’}, // 2 0 {‘d’, ‘e’, ‘f’}, // 3 1 {‘g’, ‘h’, ‘...
Println(ret)}var phone = [][]byte{ {‘a’, ‘b’, ‘c’}, // 2 0 {‘d’, ‘e’, ‘f’}, // 3 1 {‘g’, ‘h’, ‘...
其他情況,不需要開闢空間...