# Bloomberg 2021 index
###### tags: `Bloomberg`

Array
[41. First Missing Positive](/XKfkD_ArRhSh2lj07uyOuA)
[723. Candy Crush](/sJGEaZ_FRsici5mhojdUTw)
[794. Valid Tic-Tac-Toe State](/WRWobZ0TRDm5dg5SBXWO2Q)

Stack
[20. Valid Parentheses](/5AYLNgwWSdSxe7Qk3lZECA)
[394. Decode String](/6Y024lU2QMyz3RLVIcItBA)
[445. Add Two Numbers II](/fUgl_6wnS1idCsQAYWCM0A)
[1249. Minimum Remove to Make Valid Parentheses](/hFLdTtf5R4q446ZzguqoDQ)
[1209. Remove All Adjacent Duplicates in String II](/XLFQOBILSAywjjt52nCzaw)

Linked List
[2. Add Two Numbers](/zyUDXjFYRIao15VM8rtBVw)
[1244. Design A Leaderboard](/EHCfVKNsTZibR2phTz2B_w)
[1472. Design Browser History](/eMdA6UJdRxqQrkDMlaysTA)

OOP
[1396. Design Underground System](/eFdHljx6QYCJEjYA92I-Gw)

Binary Tree
[103. Binary Tree Zigzag Level Order Traversal](/aYXsyNeZTW6lw7BsUEdqrQ)
[501. Find Mode in Binary Search Tree](/r4kt7EpdQD2Rsyp_YjdJPg)
[98. Validate Binary Search Tree(Meduim)](/K4VxCRdKSgy4sd3PoRNLlA)
[104. Maximum Depth of Binary Tree(Easy)](/WMv7jMkOQAenZLrrIUjWFg)
[236. Lowest Common Ancestor of a Binary Tree(Medum)](/Md6ZJBsdQtKL66iSPVISrg)
[987. Vertical Order Traversal of a Binary Tree](/wflud3V7QgmDcsmNFY4ICQ)

Two Pointer
[42. Trapping Rain Water](/guxsKEzISHaGafmKmxf0HQ)

DFS
[797. All Paths From Source to Target](/3Eoqx-0tQpOX07hsTnQ4pw)
[430. Flatten a Multilevel Doubly Linked List](/KudyfQmcRe2Y8egpJWMXkA)

Diviede and Conquer
[1274. Number of Ships in a Rectangle](/_MbrYG6qTC2DehUtui0WhQ)

Map
[242. Valid Anagram](/OZhB4UAATxe4Dp0GWrH9Ww)
[1583. Count Unhappy Friends](/P7S2ysj2Q_CgAG-W4r7Y3Q)

Heap
[407. Trapping Rain Water II](/ap66Yr5GTdeD-ejeXlY3Gw)
[692. Top K Frequent Words](/F3pJiPoRRhqAKIXsMayn2g)

Dynamic Programming
[403. Frog Jump](/hsSgyHb7QqORdFd7C_eIEQ)
[45. Jump Game II](/YW8gYQWFSRuTdTP0yJymbA)
[140. Word Break II](/xnrYWVcfTqWQTB_WTBIgWA)
[322. Coin Change](/OQ8l7wKRTFqqIja3YQl8yQ)
[964. Least Operators to Express Number](/VoSr-KYPTS62lyNMQXVwuA)

Greedy
[56. Merge Intervals](/m7MNzLYdQ-GUTucpIc8WkQ)
[253. Meeting Rooms II](/9Wmm_ByVRNiW8joZznT-DA)
[1029. Two City Scheduling](/-xw9IK5jRd6dYROdW5eybA)