@@ -61,9 +61,9 @@ leetcode 题解，记录自己的 leetcode 解题之路。
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6262![ basic-data-structure-call-stack] ( ./assets/thinkings/basic-data-structure-call-stack.png )
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64- 再看动态规划 :
64+ 回溯法解题 :
6565
66- ![ dynamic-programming-3 ] ( ./assets/thinkings/dynamic-programming-3 .png )
66+ ![ backtrack ] ( ./assets/problems/backtrack .png )
6767
6868875 . koko-eating-bananas:
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@@ -98,10 +98,16 @@ leetcode 题解，记录自己的 leetcode 解题之路。
9898- [ 11.container-with-most-water] ( ./problems/11.container-with-most-water.md )
9999- [ 19. Remove Nth Node From End of List] ( ./problems/removeNthNodeFromEndofList.md )
100100- [ 24. Swap Nodes In Pairs] ( ./problems/swapNodesInPairs.md )
101- - 🆕[ 55.jump-game.md] ( ./problems/55.jump-game.md )
101+ - 🆕[ 39.combination-sum] ( ./problems/39.combination-sum.md )
102+ - 🆕[ 40.combination-sum-ii] ( ./problems/40.combination-sum-ii.md )
103+ - 🆕[ 46.permutations] ( ./problems/46.permutations.md )
104+ - 🆕[ 47.permutations-ii] ( ./problems/47.permutations-ii.md )
105+ - 🆕[ 55.jump-game] ( ./problems/55.jump-game.md )
102106- 🆕[ 62.unique-paths] ( ./problems/62.unique-paths.md )
103- - [ 75.sort-colors.md] ( ./problems/75.sort-colors.md )
107+ - [ 75.sort-colors] ( ./problems/75.sort-colors.md )
108+ - 🆕[ 78.subsets] ( ./problems/78.subsets.md )
104109- [ 86.partition-list] ( ./problems/86.partition-list.md )
110+ - 🆕[ 90.subsets-ii] ( ./problems/90.subsets-ii.md )
105111- [ 92.reverse-linked-list-ii] ( ./problems/92.reverse-linked-list-ii.md )
106112- [ 94.binary-tree-inorder-traversal] ( ./problems/94.binary-tree-inorder-traversal.md )
107113- [ 102.binary-tree-level-order-traversal] ( ./problems/102.binary-tree-level-order-traversal.md )
@@ -165,6 +171,8 @@ anki - 文件 - 导入 - 下拉格式选择“打包的 anki集合”，然后
165171
166172- anki 卡片 完善
167173
174+ - 字符串类问题汇总
175+
168176##交流群
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170178现在还是初级阶段，需要大家的意见和反馈，为了减少沟通成本，我组建了交流群。大家可以扫码进入
