https://leetcode-solutions-5zk.pages.dev/tags/backtracking/Recent content in Backtracking on LeetCode 题解笔记Hugozh-cn2026 ZenzZweiMon, 11 May 2026 12:12:02 +0800https://leetcode-solutions-5zk.pages.dev/posts/3348-smallest-divisible-digit-product-ii/Wed, 06 May 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3348-smallest-divisible-digit-product-ii/Hard | Math, String, Backtracking, Greedy, Number Theoryhttps://leetcode-solutions-5zk.pages.dev/posts/1774-closest-dessert-cost/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1774-closest-dessert-cost/Medium | Array, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1947-maximum-compatibility-score-sum/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1947-maximum-compatibility-score-sum/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/2014-longest-subsequence-repeated-k-times/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2014-longest-subsequence-repeated-k-times/Hard | Hash Table, Two Pointers, String, Backtracking, Counting, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2151-maximum-good-people-based-on-statements/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2151-maximum-good-people-based-on-statements/Hard | Array, Backtracking, Bit Manipulation, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2397-maximum-rows-covered-by-columns/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2397-maximum-rows-covered-by-columns/Medium | Array, Backtracking, Bit Manipulation, Matrix, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/0037-sudoku-solver/Thu, 30 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0037-sudoku-solver/Hard | Array, Hash Table, Backtracking, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/1239-maximum-length-of-a-concatenated-string-with-unique-characters/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1239-maximum-length-of-a-concatenated-string-with-unique-characters/Medium | Array, String, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0126-word-ladder-ii/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0126-word-ladder-ii/Hard | Hash Table, String, Backtracking, Breadth-First Searchhttps://leetcode-solutions-5zk.pages.dev/posts/0131-palindrome-partitioning/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0131-palindrome-partitioning/Medium | String, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/2767-partition-string-into-minimum-beautiful-substrings/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2767-partition-string-into-minimum-beautiful-substrings/Medium | Hash Table, String, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0306-additive-number/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0306-additive-number/Medium | String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0401-binary-watch/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0401-binary-watch/Easy | Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0526-beautiful-arrangement/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0526-beautiful-arrangement/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0090-subsets-ii/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0090-subsets-ii/Medium | Array, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0980-unique-paths-iii/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0980-unique-paths-iii/Hard | Array, Backtracking, Bit Manipulation, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/0988-smallest-string-starting-from-leaf/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0988-smallest-string-starting-from-leaf/Medium | String, Backtracking, Tree, Depth-First Search, Binary Treehttps://leetcode-solutions-5zk.pages.dev/posts/0996-number-of-squareful-arrays/Wed, 29 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0996-number-of-squareful-arrays/Hard | Array, Hash Table, Math, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/3211-generate-binary-strings-without-adjacent-zeros/Mon, 27 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3211-generate-binary-strings-without-adjacent-zeros/Medium | String, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/3376-minimum-time-to-break-locks-i/Mon, 27 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3376-minimum-time-to-break-locks-i/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Breadth-First Search, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/3646-next-special-palindrome-number/Mon, 27 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3646-next-special-palindrome-number/Hard | Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/3669-balanced-k-factor-decomposition/Mon, 27 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3669-balanced-k-factor-decomposition/Medium | Math, Backtracking, Number Theoryhttps://leetcode-solutions-5zk.pages.dev/posts/3799-word-squares-ii/Mon, 27 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/3799-word-squares-ii/Medium | Array, String, Backtracking, Sorting, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2698-find-the-punishment-number-of-an-integer/Sat, 25 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2698-find-the-punishment-number-of-an-integer/Medium | Math, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/2708-maximum-strength-of-a-group/Sat, 25 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2708-maximum-strength-of-a-group/Medium | Array, Dynamic Programming, Backtracking, Greedy, Bit Manipulation, Sorting, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2850-minimum-moves-to-spread-stones-over-grid/Sat, 25 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2850-minimum-moves-to-spread-stones-over-grid/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Matrix, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/2002-maximum-product-of-the-length-of-two-palindromic-subsequences/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2002-maximum-product-of-the-length-of-two-palindromic-subsequences/Medium | String, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/2044-count-number-of-maximum-bitwise-or-subsets/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2044-count-number-of-maximum-bitwise-or-subsets/Medium | Array, Backtracking, Bit Manipulation, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2048-next-greater-numerically-balanced-number/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2048-next-greater-numerically-balanced-number/Medium | Hash Table, Math, Backtracking, Counting, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2056-number-of-valid-move-combinations-on-chessboard/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2056-number-of-valid-move-combinations-on-chessboard/Hard | Array, String, Backtracking, Simulationhttps://leetcode-solutions-5zk.pages.dev/posts/2065-maximum-path-quality-of-a-graph/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2065-maximum-path-quality-of-a-graph/Hard | Array, Backtracking, Graph Theoryhttps://leetcode-solutions-5zk.pages.dev/posts/2178-maximum-split-of-positive-even-integers/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2178-maximum-split-of-positive-even-integers/Medium | Math, Backtracking, Greedyhttps://leetcode-solutions-5zk.pages.dev/posts/2212-maximum-points-in-an-archery-competition/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2212-maximum-points-in-an-archery-competition/Medium | Array, Backtracking, Bit Manipulation, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/2305-fair-distribution-of-cookies/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2305-fair-distribution-of-cookies/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/2375-construct-smallest-number-from-di-string/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2375-construct-smallest-number-from-di-string/Medium | String, Backtracking, Stack, Greedyhttps://leetcode-solutions-5zk.pages.dev/posts/2597-the-number-of-beautiful-subsets/Fri, 24 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/2597-the-number-of-beautiful-subsets/Medium | Array, Hash Table, Math, Dynamic Programming, Backtracking, Sorting, Combinatoricshttps://leetcode-solutions-5zk.pages.dev/posts/1286-iterator-for-combination/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1286-iterator-for-combination/Medium | String, Backtracking, Design, Iteratorhttps://leetcode-solutions-5zk.pages.dev/posts/1307-verbal-arithmetic-puzzle/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1307-verbal-arithmetic-puzzle/Hard | Array, Math, String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n/Medium | String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1467-probability-of-a-two-boxes-having-the-same-number-of-distinct-balls/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1467-probability-of-a-two-boxes-having-the-same-number-of-distinct-balls/Hard | Array, Math, Dynamic Programming, Backtracking, Combinatorics, Probability and Statisticshttps://leetcode-solutions-5zk.pages.dev/posts/1593-split-a-string-into-the-max-number-of-unique-substrings/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1593-split-a-string-into-the-max-number-of-unique-substrings/Medium | Hash Table, String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1601-maximum-number-of-achievable-transfer-requests/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1601-maximum-number-of-achievable-transfer-requests/Hard | Array, Backtracking, Bit Manipulation, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/1655-distribute-repeating-integers/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1655-distribute-repeating-integers/Hard | Array, Hash Table, Dynamic Programming, Backtracking, Bit Manipulation, Counting, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/1718-construct-the-lexicographically-largest-valid-sequence/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1718-construct-the-lexicographically-largest-valid-sequence/Medium | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1723-find-minimum-time-to-finish-all-jobs/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1723-find-minimum-time-to-finish-all-jobs/Hard | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/1799-maximize-score-after-n-operations/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1799-maximize-score-after-n-operations/Hard | Array, Math, Dynamic Programming, Backtracking, Bit Manipulation, Number Theory, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/1849-splitting-a-string-into-descending-consecutive-values/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1849-splitting-a-string-into-descending-consecutive-values/Medium | String, Backtracking, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/1863-sum-of-all-subset-xor-totals/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1863-sum-of-all-subset-xor-totals/Easy | Array, Math, Backtracking, Bit Manipulation, Combinatorics, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/1980-find-unique-binary-string/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1980-find-unique-binary-string/Medium | Array, Hash Table, String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1986-minimum-number-of-work-sessions-to-finish-the-tasks/Thu, 23 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1986-minimum-number-of-work-sessions-to-finish-the-tasks/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/1079-letter-tile-possibilities/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1079-letter-tile-possibilities/Medium | Hash Table, String, Backtracking, Countinghttps://leetcode-solutions-5zk.pages.dev/posts/1096-brace-expansion-ii/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1096-brace-expansion-ii/Hard | Hash Table, String, Backtracking, Stack, Breadth-First Search, Sortinghttps://leetcode-solutions-5zk.pages.dev/posts/1219-path-with-maximum-gold/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1219-path-with-maximum-gold/Medium | Array, Backtracking, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/1238-circular-permutation-in-binary-representation/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1238-circular-permutation-in-binary-representation/Medium | Math, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/1240-tiling-a-rectangle-with-the-fewest-squares/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1240-tiling-a-rectangle-with-the-fewest-squares/Hard | Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/1255-maximum-score-words-formed-by-letters/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/1255-maximum-score-words-formed-by-letters/Hard | Array, Hash Table, String, Dynamic Programming, Backtracking, Bit Manipulation, Counting, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0756-pyramid-transition-matrix/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0756-pyramid-transition-matrix/Medium | Hash Table, String, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0773-sliding-puzzle/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0773-sliding-puzzle/Hard | Array, Dynamic Programming, Backtracking, Breadth-First Search, Memoization, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/0784-letter-case-permutation/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0784-letter-case-permutation/Medium | String, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0797-all-paths-from-source-to-target/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0797-all-paths-from-source-to-target/Medium | Backtracking, Depth-First Search, Breadth-First Search, Graph Theoryhttps://leetcode-solutions-5zk.pages.dev/posts/0816-ambiguous-coordinates/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0816-ambiguous-coordinates/Medium | String, Backtracking, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/0842-split-array-into-fibonacci-sequence/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0842-split-array-into-fibonacci-sequence/Medium | String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0949-largest-time-for-given-digits/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0949-largest-time-for-given-digits/Medium | Array, String, Backtracking, Enumerationhttps://leetcode-solutions-5zk.pages.dev/posts/0967-numbers-with-same-consecutive-differences/Wed, 22 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0967-numbers-with-same-consecutive-differences/Medium | Backtracking, Breadth-First Searchhttps://leetcode-solutions-5zk.pages.dev/posts/0491-non-decreasing-subsequences/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0491-non-decreasing-subsequences/Medium | Array, Hash Table, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0494-target-sum/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0494-target-sum/Medium | Array, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0638-shopping-offers/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0638-shopping-offers/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Memoization, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0679-24-game/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0679-24-game/Hard | Array, Math, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0691-stickers-to-spell-word/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0691-stickers-to-spell-word/Hard | Array, Hash Table, String, Dynamic Programming, Backtracking, Bit Manipulation, Memoization, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0698-partition-to-k-equal-sum-subsets/Tue, 21 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0698-partition-to-k-equal-sum-subsets/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Memoization, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0357-count-numbers-with-unique-digits/Mon, 20 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0357-count-numbers-with-unique-digits/Medium | Math, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0473-matchsticks-to-square/Mon, 20 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0473-matchsticks-to-square/Medium | Array, Dynamic Programming, Backtracking, Bit Manipulation, Bitmaskhttps://leetcode-solutions-5zk.pages.dev/posts/0113-path-sum-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0113-path-sum-ii/Medium | Backtracking, Tree, Depth-First Search, Binary Treehttps://leetcode-solutions-5zk.pages.dev/posts/0140-word-break-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0140-word-break-ii/Hard | Array, Hash Table, String, Dynamic Programming, Backtracking, Trie, Memoizationhttps://leetcode-solutions-5zk.pages.dev/posts/0017-letter-combinations-of-a-phone-number/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0017-letter-combinations-of-a-phone-number/Medium | Hash Table, String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0212-word-search-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0212-word-search-ii/Hard | Array, String, Backtracking, Trie, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/0216-combination-sum-iii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0216-combination-sum-iii/Medium | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0022-generate-parentheses/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0022-generate-parentheses/Medium | String, Dynamic Programming, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0257-binary-tree-paths/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0257-binary-tree-paths/Easy | String, Backtracking, Tree, Depth-First Search, Binary Treehttps://leetcode-solutions-5zk.pages.dev/posts/0282-expression-add-operators/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0282-expression-add-operators/Hard | Math, String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0301-remove-invalid-parentheses/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0301-remove-invalid-parentheses/Hard | String, Backtracking, Breadth-First Searchhttps://leetcode-solutions-5zk.pages.dev/posts/0039-combination-sum/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0039-combination-sum/Medium | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0040-combination-sum-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0040-combination-sum-ii/Medium | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0046-permutations/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0046-permutations/Medium | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0047-permutations-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0047-permutations-ii/Medium | Array, Backtracking, Sortinghttps://leetcode-solutions-5zk.pages.dev/posts/0051-n-queens/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0051-n-queens/Hard | Array, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0052-n-queens-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0052-n-queens-ii/Hard | Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0077-combinations/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0077-combinations/Medium | Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0078-subsets/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0078-subsets/Medium | Array, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0079-word-search/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0079-word-search/Medium | Array, String, Backtracking, Depth-First Search, Matrixhttps://leetcode-solutions-5zk.pages.dev/posts/0089-gray-code/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0089-gray-code/Medium | Math, Backtracking, Bit Manipulationhttps://leetcode-solutions-5zk.pages.dev/posts/0093-restore-ip-addresses/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0093-restore-ip-addresses/Medium | String, Backtrackinghttps://leetcode-solutions-5zk.pages.dev/posts/0095-unique-binary-search-trees-ii/Fri, 17 Apr 2026 00:00:00 +0000https://leetcode-solutions-5zk.pages.dev/posts/0095-unique-binary-search-trees-ii/Medium | Dynamic Programming, Backtracking, Tree, Binary Search Tree, Binary Tree