AlgoDaily

I believe that practising algorithms every day is a long-term investment in my life.

Languages

golang, python, js

Target topics

Binary Search
Binary Search Tree
Tree(Binary Tree, N-aray Tree, Trie, Binary Indexed Tree, Segment Tree)
Graph(Dijkstra, Bellman-Ford, Floyd Warshall, Union Find, Kruskal, Prim's, Minimum Spanning Tree, Topological Ordering, Tarjan...etc)
Stack
Queue
Array
Sorting
Heap
Hash Table
Linked list
Bit Operation
Backtracking
Dynamic programming(Kadan, Knapsack, Binary Lifting...etc)
Math (Reservoir Sampling, Rejection Sampling...etc)
and more...

Questions from

My other related repos

Journey

I have been doing this every day since September 1st, 2018
On Sep 17th, 2019, day 381, I joined eBay
On May 27th, 2021, day 1000
On June 1st, 2021, day 1004, I joined Facebook

const start = new Date("09/01/2018");
const now = new Date();
console.log(Math.ceil((now - start) / (1000 * 3600 * 24)));

Day	Question	Type	From	remarks
1101	Find All Groups of Farmland	graph	leetcode 1992
1102	Operations on Tree	graph	leetcode 1992
1103	Count Special Quadruplets	hashtable, binary search	leetcode 1995
1104	The Number of Weak Characters in the Game	sort	leetcode 1996
1105	First Day Where You Have Been in All the Rooms	dynamic programming	leetcode 1997	📌
1106	Smallest Greater Multiple Made of Two Digits	graph	leetcode 1999
1107	Max Points on a Line	math	leetcode 149	⭐️
1108	String Transforms Into Another String	hashtable	leetcode 1153	📌
1109	Sum of Subarray Minimums	stack	leetcode 907	📌
1110	Reverse Prefix of Word	string	leetcode 2000
1111	Number of Pairs of Interchangeable Rectangles	hashtable	leetcode 1153
1112	Split Array With Same Average	dynamic programming	leetcode 805	📌⭐️
1113	Subtree Removal Game with Fibonacci Tree	math	leetcode 2005	📌🌚 not for interview
1114	Numbers At Most N Given Digit Set	math	leetcode 902	📌
1115	Count Number of Pairs With Absolute Difference K	array	leetcode 2006
1116	Find Original Array From Doubled Array	hashtable, sort	leetcode 2007
1117	Maximum Earnings From Taxi	dynamic programming	leetcode 2008	⭐️ knapsack
1118	Final Value of Variable After Performing Operations	string	leetcode 2011
1119	Sum of Beauty in the Array	min max arrays	leetcode 2006
1120	Detect Squares	hashtable, math	leetcode 2013	⭐️
1121	Average Height of Buildings in Each Segment	math, hashtable	leetcode 2015	⭐️ line sweeping
1122	Maximum Number of Eaten Apples	heap, math	leetcode 1705	⭐️
1123	Water and Jug Problem	graph, math	leetcode 365	⭐️ BFS
1124	Maximum Difference Between Increasing Elements	dynamic programming	leetcode 2016
1125	Grid Game	greedy	leetcode 2017	⭐️ prefix sum
1126	Brightest Position on Street	line sweeping	leetcode 2021
1127	Find XOR Sum of All Pairs Bitwise AND	bit op	leetcode 1835	📌
1128	Wrong Subtraction	math	codeforces 977a	📌
1129	Convert 1D Array Into 2D Array	array	leetcode 2022
1130	Number of Pairs of Strings With Concatenation Equal to Target	hashtable	leetcode 2023
1131	Maximize the Confusion of an Exam	2 pointers	leetcode 2024
1132	Minimum Moves to Convert String	queue	leetcode 2027
1133	Find Missing Observations	math	leetcode 2028
1134	Minimum Number of Increments on Subarrays to Form a Target Array	greedy	leetcode 1526	📌
1135	Count Subarrays With More Ones Than Zeros	hashtable, prefix sum	leetcode 2031	📌 need a review
1136	Max Value of Equation	heap	leetcode 1499	⭐️ maxheap
1137	Watermelon	math	codeforces 4a
1138	Way Too Long Words	string	codeforces 71a
1139	Two Out of Three	hashtable	leetcode 2032
1140	Minimum Operations to Make a Uni-Value Grid	sort, math	leetcode 2033	⭐️ median works
1141	Stock Price Fluctuation	heap, hashtable	leetcode 2034	⭐️ 2 heaps + hashtable reverse mapping
1142	Maximum Alternating Subarray Sum	dynamic programming	leetcode 2036	⭐️ kadane's
1143	Minimum Number of Moves to Seat Everyone	sort	leetcode 2037
1144	Progress Bar	math	codeforces 71b
1145	Remove Colored Pieces if Both Neighbors are the Same Color	heap	leetcode 2038
1146	The Time When the Network Becomes Idle	graph, math	leetcode 2039	⭐️
1147	Check if Numbers Are Ascending in a Sentence	string	leetcode 2042
1148	Simple Bank System	array	leetcode 2043
1149	Count Number of Maximum Bitwise-OR Subsets	recursion	leetcode 2044
1150	Sort Linked List Already Sorted Using Absolute Values	linked list	leetcode 2046
1151	Number of Valid Words in a Sentence	string	leetcode 2047
1152	Count Nodes With the Highest Score	graph	leetcode 2049	⭐️
1153	Next Greater Numerically Balanced Number	greedy	leetcode 2048
1154	Team	array	codeforces 231a
1155	Next Round	heap	codeforces 158a
1156	Domino piling	math	codeforces 50a
1157	Kth Distinct String in an Array	hashtable	leetcode 2053
1158	Two Best Non-Overlapping Events	sort, heap	leetcode 2054	⭐️ standard interview question
1159	Plates Between Candles	binary search	leetcode 2055	prefix sum, binary search
1160	Smallest Index With Equal Value	array	leetcode 2057
1161	Minimum Operations to Convert Number	graph	leetcode 2059
1162	Find the Minimum and Maximum Number of Nodes Between Critical Points	linked list	leetcode 2058
1163	Number of Spaces Cleaning Robot Cleaned	graph, hashtable	leetcode 2061	⭐️
1164	Bit++	implementation	codeforces 282a
1165	Count Vowel Substrings of a String	string	leetcode 2062
1166	Minimized Maximum of Products Distributed to Any Store	binary search	leetcode 2064
1167	Beautiful Matrix	implememtation	codeforces 263a
1168	Vowels of All Substrings	math	leetcode 2063	⭐️
1169	Petya and Strings	string	codeforces 112a	⭐️
1170	Helpful Maths	sort	codeforces 339a
1171	Check Whether Two Strings are Almost Equivalent	hashtable	leetcode 2068

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algodaily's Introduction

AlgoDaily

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