GitHub - Serj1c/100-leetcode-easy

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Name		Name	Last commit message	Last commit date
Latest commit History 9 Commits
100_reverse_bits.py		100_reverse_bits.py
101_find_smallest_letter_gt_target.py		101_find_smallest_letter_gt_target.py
102_range_sum_query_immutable.py		102_range_sum_query_immutable.py
10_student_attendance_record.py		10_student_attendance_record.py
11_binary_tree_postorder_traversal.py		11_binary_tree_postorder_traversal.py
12_is_subsequence.py		12_is_subsequence.py
13_symmetric_tree.py		13_symmetric_tree.py
14_plus_one.py		14_plus_one.py
15_meeting_rooms.py		15_meeting_rooms.py
16_middle_of_the_linked_list.py		16_middle_of_the_linked_list.py
17_check_if_n_and_its_double_exist.py		17_check_if_n_and_its_double_exist.py
18_n_th_tribonacci_number.py		18_n_th_tribonacci_number.py
19_binary_search.py		19_binary_search.py
1_is_palindrome.py		1_is_palindrome.py
20_pascal_triangle.py		20_pascal_triangle.py
21_single_number.py		21_single_number.py
22_peak_index_in_a_mountain_array.py		22_peak_index_in_a_mountain_array.py
23_valid_palindrome.py		23_valid_palindrome.py
24_reverse_string.py		24_reverse_string.py
25_sqrtx.py		25_sqrtx.py
26_find_nums_with_even_num_of_digits.py		26_find_nums_with_even_num_of_digits.py
27_find_the_difference.py		27_find_the_difference.py
28_remove_all_adj_dupls_in_string.py		28_remove_all_adj_dupls_in_string.py
29_reverse_words_in_string_3.py		29_reverse_words_in_string_3.py
2_contains_diplicates.py		2_contains_diplicates.py
30_first_bad_version.py		30_first_bad_version.py
31_guess_num_higher_or_lower.py		31_guess_num_higher_or_lower.py
32_search_insert_position.py		32_search_insert_position.py
33_power_of_four.py		33_power_of_four.py
34_valid_anagram.py		34_valid_anagram.py
35_can_place_flowers.py		35_can_place_flowers.py
36_min_depth_of_b_tree.py		36_min_depth_of_b_tree.py
37_backspace_string_compare.py		37_backspace_string_compare.py
38_linked_list_cycle.py		38_linked_list_cycle.py
39_power_of_two.py		39_power_of_two.py
3_remove_linked_list_elements.py		3_remove_linked_list_elements.py
40_reverse_linked_list.py		40_reverse_linked_list.py
41_hamming_distance.py		41_hamming_distance.py
42_missing_number.py		42_missing_number.py
43_binary_tree_paths.py		43_binary_tree_paths.py
44_convert_sorted_array_to_bst.py		44_convert_sorted_array_to_bst.py
45_merge_two_binary_trees.py		45_merge_two_binary_trees.py
46_flipping_an_image.py		46_flipping_an_image.py
47_two_sum_sorted_array.py		47_two_sum_sorted_array.py
48_verifying_an_alien_dictionary.py		48_verifying_an_alien_dictionary.py
49_valid_mountain_array.py		49_valid_mountain_array.py
4_counting_bits.py		4_counting_bits.py
50_roman_to_integer.py		50_roman_to_integer.py
51_license_key_formatting.py		51_license_key_formatting.py
52_assign_cookies.py		52_assign_cookies.py
53_majority_element.py		53_majority_element.py
54_same_tree.py		54_same_tree.py
55_bi_tree_inorder_traversal.py		55_bi_tree_inorder_traversal.py
56_summary_ranges.py		56_summary_ranges.py
57_delete_node_in_a_l_list.py		57_delete_node_in_a_l_list.py
58_kids_with_most_candies.py		58_kids_with_most_candies.py
59_reverse_vowels_of_a_string.py		59_reverse_vowels_of_a_string.py
5_unique_emails.py		5_unique_emails.py
60_sum_of_left_leaves.py		60_sum_of_left_leaves.py
61_add_binary.py		61_add_binary.py
62_longest_palindrome.py		62_longest_palindrome.py
63_bi_tree_preorder_traversal.py		63_bi_tree_preorder_traversal.py
64_length_of_last_word.py		64_length_of_last_word.py
65_max_consecutive_ones.py		65_max_consecutive_ones.py
66_longest_continuous_incr_subseq.py		66_longest_continuous_incr_subseq.py
67_remove_dupls_from_sorted_array.py		67_remove_dupls_from_sorted_array.py
68_running_sum_of_1d_array.py		68_running_sum_of_1d_array.py
69_isomorphic_strings.py		69_isomorphic_strings.py
6_max_average_subarray.py		6_max_average_subarray.py
70_intersection_of_two_arrays.py		70_intersection_of_two_arrays.py
71_contains_duplicates_2.py		71_contains_duplicates_2.py
72_merge_two_sorted_lists.py		72_merge_two_sorted_lists.py
73_longest_common_prefix.py		73_longest_common_prefix.py
74_two_sum.py		74_two_sum.py
75_valid_parentheses.py		75_valid_parentheses.py
76_search_in_a_bst copy.py		76_search_in_a_bst copy.py
77_convert_binary_in_a_ll_to_int.py		77_convert_binary_in_a_ll_to_int.py
78_number_of_1_bits.py		78_number_of_1_bits.py
79_range_sum_of_bst.py		79_range_sum_of_bst.py
7_move_zeroes.py		7_move_zeroes.py
80_max_depth_of_bi_tree.py		80_max_depth_of_bi_tree.py
81_sort_array_by_parity.py		81_sort_array_by_parity.py
82_monotonic_array.py		82_monotonic_array.py
83_two_sum_bst.py		83_two_sum_bst.py
84_average_of_lvls_in_bi_tree.py		84_average_of_lvls_in_bi_tree.py
85_remove_element.py		85_remove_element.py
86_find_all_nums_in_an_array.py		86_find_all_nums_in_an_array.py
87_find_idx_of_1st_occur_in_str.py		87_find_idx_of_1st_occur_in_str.py
88_invert_binary_tree.py		88_invert_binary_tree.py
89_closest_bst_value.py		89_closest_bst_value.py
8_valid_perfect_square.py		8_valid_perfect_square.py
90_squares_of_a_sorted_array.py		90_squares_of_a_sorted_array.py
91_jewels_and_stones.py		91_jewels_and_stones.py
91_remove_dupls_from_sorted_list.py		91_remove_dupls_from_sorted_list.py
92_fst_unique_char_in_a_str.py		92_fst_unique_char_in_a_str.py
93_ransom_note.py		93_ransom_note.py
94_fizz_buzz.py		94_fizz_buzz.py
95_fib_num.py		95_fib_num.py
96_detect_capital.py		96_detect_capital.py
97_happy_number.py		97_happy_number.py

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def license_key_formatting(s: str, k: int) -> str:
    s = s.replace('-')
    s.upper()

    ans = ''

    for i in range(len(s)-1, -1, -1):
        if not len(ans) % (k+1):
            ans += '-'
        ans += s[i]

    return ans[::-1][:-1]