add: rename some files

src/problem/mod.rs

@@ -1,19 +1,19 @@
-mod p0001_two_sum;
-mod p0009_palindrome_number;
-mod p0020_valid_parentheses;
+mod p1_two_sum;
+mod p9_palindrome_number;
+mod p20_valid_parentheses;
 mod p2697_lexicographically_smallest_palindrome;
-mod p0002_add_two_numbers;
-mod p0003_longest_substring_without_repeating_characters;
-mod p0162_find_peak_element;
+mod p2_add_two_numbers;
+mod p3_longest_substring_without_repeating_characters;
+mod p162_find_peak_element;
 mod p2828_check_if_a_string_is_an_acronym_of_words;
 mod p0052_n_queens_ii;
-mod p0912_sort_an_array;
+mod p912_sort_an_array;
 mod p1276_number_of_burgers_with_no_waste_of_ingredients;
-mod p0006_zigzag_conversion;
-mod p0007_reverse_integer;
-mod p0004_median_of_two_sorted_arrays;
-mod p0743_network_delay_time;
-mod p0447_number_of_boomerangs;
+mod p6_zigzag_conversion;
+mod p7_reverse_integer;
+mod p4_median_of_two_sorted_arrays;
+mod p743_network_delay_time;
+mod p447_number_of_boomerangs;
 mod p2085_count_common_words_with_one_occurrence;
 mod p2182_construct_string_with_repeat_limit;
 mod p83_remove_duplicates_from_sorted_list;