Problem solving is fun and special way for spending valuable time

Here some problem different algorithm base and from different online judge which are collected my learing time

Problem	Judge	Algorithm	Solution
Binary Search
1307 Counting Triangles	LightOj	Binary Search	1307 Counting Triangles
1062 Crossed Ladders	LightOj	Binary Search	1062 Crossed Ladders
Kitorp and His Love	Toph	NT,Trailling Zero	Kitorp and His Love
Min Value	Toph	none	Min Value
Combinatorics
1102 Problem Makes Problem	LightOj	Combinatorics	1102 Problem Makes Problem
1117_Helping_Cicada	LightOj	Inclusion-exclusion	1117_Helping_Cicada
Data Structure
Flight Routes	CSES	Topological Sort	Flight Routes
Course Schedule	CSES	Topological Sort	Course Schedule
Game Routes	CSES	Topological Sort	Game Routes
Longest Flight Route	CSES	Topological Sort	Longest Flight Route
1089 Points in Segments (II)	LightOj	map, cumulative sum	1089 Points in Segments (II)
1087 Diablo	LightOj	Segtree Basic	1087 Diablo
SubXor	Spoj	Trie , XOR	SubXor
Divide and Conquer
Subtree Minimum Query	CodeForces	Merge Sort Tree	Subtree Minimum Query
Coloring Tree	Hackerrank	Merge sort tree	Coloring Tree
KQUERY - K-query	Spoj	Merge Sort and Seg tree	KQUERY - K-query
Tree Queries	Toph	Merge Sort tree basic	Tree Queries
Exists or Not Exists	Toph	Merge Sort Tree, Binary Search	Exists or Not Exists
Dynamic Programming
Coin Combinations I	CSES	Coin Change	Coin Combinations I
Missing Coin Sum	CSES	Coin Change	Missing Coin Sum
Roman and Numbers	Codeforces	Bitmask	Roman and Numbers
Painfull Bases	LightOj	Bitmask	Painfull Bases
1037 Agent 47	LightOj	dp bitmask	1037 Agent 47
1011 Marriage Ceremonies	LightOj	Bitmask	1011 Marriage Ceremonies
1231 Coin Change (I)	LightOj	Coin Change	1231 Coin Change (I)
1232_Coin_Change_(II)	LightOj	coin-change	1232_Coin_Change_(II)
1158_Anagram_Division	LightOj	combinatorics	1158_Anagram_Division
1032_Fast_Bit_Calculations	LightOj	Digit DP	1032_Fast_Bit_Calculations
1159_Batman	LightOj	LCS 3 string	1159_Batman
1017 Brush (III)	LightOj	DP	1017 Brush (III)
1025_The_Specials_Menu	LightOj	DP	1025_The_Specials_Menu
1119_Pimp_My_Ride	LightOj	DP	1119_Pimp_My_Ride
1125_Divisible_Group_Sums	LightOj	DP	1125_Divisible_Group_Sums
1140_How_Many_Zeroes?	LightOj	DP	1140_How_Many_Zeroes?
1217_Neighbor_House_(II)	LightOj	DP	1217_Neighbor_House_(II)
1057 Collecting Gold	LightOj	DP	1057 Collecting Gold
1018 Brush (IV)	LightOj	Bitmask	1018 Brush (IV)
CPCRC1C - Sum of Digits	SPOJ	Digit DP	CPCRC1C - Sum of Digits
Reverse Hash	Toph	DP	Reverse Hash
Naughty Subsequence - V2.0	Toph	Longest Increasing Subsequence	Naughty Subsequence - V2.0
Expected value
1030_Discovering_Gold	LightOj	Expected value	1030_Discovering_Gold
1027_A_Dangerous_Maze	LightOj	Expected value	1027_A_Dangerous_Maze
Race to 1 Again	LightOj	Expected value	Race to 1 Again
Geometry
1137_Expanding_Rods	LightOj	Geometry	1137_Expanding_Rods
1146 Closest Distance	LightOj	geometry	1146 Closest Distance
Graph and Tree
Even Relation	Atcoder	Basic	Even Relation
Cycle Finding	CSES	Bellman ford	Cycle Finding
Shortest Routes II	CSES	Floyd Warshall	Shortest Routes II
Fixed-Length Paths I	CSES	Centroid Decomposition	Fixed-Length Paths I
Distance in Tree	CodeForces	Centroid Decomposition	Distance in Tree
Lomsat gelral	CodeForces	DFS, small to large	Lomsat gelral
Robot_Factory	CodeForces	DSU	Robot_Factory
Roads in Berland	Codeforces	Floyd Warshall	Roads in Berland
String Problem	Codeforces	Floyd Warshall	String Problem
Manic Moving	Codeforces	Floyd Warshall	Manic Moving
Greg and Graph	Codeforces	Floyd Warshall	Greg and Graph
Traveling Graph	Codeforces	Floyd Warshall	Traveling Graph
Kth Ancestor of a Tree Node	LeetCode	LCA	Kth Ancestor of a Tree Node
Jogging Trails	LightOj	Floyd Warshall	Jogging Trails
Travel Company	LightOj	Floyd Warshall	Travel Company
1012 Guilty Prince	LightOj	BFS and DFS	1012 Guilty Prince
1034 Hit the Light Switches	LightOj	bfs dfs	1034 Hit the Light Switches
1094 Farthest Nodes in a Tree	LightOj	BFS and DFS	1094 Farthest Nodes in a Tree
1049 One Way Roads	LightOj	BFS and DFS	1049 One Way Roads
1066 Gathering Food	LightOj	BFS and DFS	1066 Gathering Food
1437 Beehives	LightOj	BFS and DFS	1437 Beehives
1111 Best Picnic Ever	LightOj	BFS and DFS	1111 Best Picnic Ever
1185 Escape	LightOj	bfs basic lv 2	1185 Escape
1219 Mafia	LightOj	BFS and DFS	1219 Mafia
1175 Jane and the Frost Giants	LightOj	BFS and DFS	1175 Jane and the Frost Giants
1238 Power Puff Girls	LightOj	BFS and DFS	1238 Power Puff Girls
1337 The Crystal Maze	LightOj	BFS and DFS	1337 The Crystal Maze
1201_A_Perfect_Murder	LightOj	dfs	1201_A_Perfect_Murder
1094 Farthest Nodes in a Tree	LightOj	Diameter of Tree	1094 Farthest Nodes in a Tree
1029_Civil_and_Evil_Engineer	LightOj	DSU	1029_Civil_and_Evil_Engineer
1041 Road Construction	LightOj	MST	1041 Road Construction
1040 Donation	LightOj	MST	1040 Donation
Ingredients	Spoj	Floyd Warshall	Ingredients
106 miles to Chicago	Spoj	Floyd Warshall	106 miles to Chicago
Arbitrage	Spoj	Floyd Warshall	Arbitrage
SOCIALNE - Possible Friends	Spoj	Floyd Warshall	SOCIALNE - Possible Friends
Defend the Rohan	Spoj	Floyd Warshall	Defend the Rohan
PARADOX Paradox	Spoj	BFS and DFS	PARADOX Paradox
CCHESS_COSTLY_CHESS	Spoj	BFS	CCHESS_COSTLY_CHESS
AKBAR_-_Akbar_,_The_great	Spoj	BFS	AKBAR_-_Akbar_,_The_great
Kingdom of Coden	Toph	Floyd Warshall	Kingdom of Coden
COVID-19 Outbreak	Toph	DFS Basic	COVID-19 Outbreak
Hashing	Toph	DSU XOR	Hashing
Static Tree	Toph	Lowest common ancestor	Static Tree
Page Hopping UVA - 821	UVA	Floyd Warshall	Page Hopping UVA - 821
Road Construction	UVA	Floyd Warshall	Road Construction
T he Postal Worker Rings Once	UVA	Floyd Warshall	T he Postal Worker Rings Once
he Geodetic Set Problem	UVA	Floyd Warshall	he Geodetic Set Problem
Audiophobia	UVA	Floyd Warshall	Audiophobia
Numbering Paths	UVA	Floyd Warshall	Numbering Paths
MPI Maelstrom	UVA	Floyd Warshall	MPI Maelstrom
Warfare And Logistics	UVA	Floyd Warshall	Warfare And Logistics
USHER	UVA	Floyd Warshall	USHER
The Orc Attack	UVA	Floyd Warshall	The Orc Attack
The Tourist Guide	UVA	Floyd Warshall	The Tourist Guide
Airline Comparison	UVA	Floyd Warshall	Airline Comparison
Geonosis	UVA	Floyd Warshall	Geonosis
Randomly-priced Tickets	UVA	Floyd Warshall	Randomly-priced Tickets
336_A_Node_Too_Far_	UVA	bfs	336_A_Node_Too_Far_
Greedy
ZCO15004 Rectangle	Codechef	STL - stack	ZCO15004 Rectangle
Implementation
Ice-Cream of Montu Mia Again!	Toph	none	Ice-Cream of Montu Mia Again!
Interval
Movie Festival	CSES	Prefix Sum	Movie Festival
INTERVA2 - Interval Challenge	Spoj	Interval	INTERVA2 - Interval Challenge
Number Theory
1163_Bank_Robbery	LightOj	Number Theory	1163_Bank_Robbery
1054 Efficient Pseudo Code	LightOj	Inverse Modulo	1054 Efficient Pseudo Code
HS08PAUL - A conjecture of Paul Erdős	Spoj	Trailling Zero	HS08PAUL - A conjecture of Paul Erdős
Kitorp and His Love	Toph	Trailling Zero	Kitorp and His Love
Bi-Element Subsequence	Toph	Prefix Sum	Bi-Element Subsequence
Segment Tree
1164_Horrible_Queries	LightOj	Segment Tree	1164_Horrible_Queries
1162 Min Max Roads	LightOj	Bitmask	1162 Min Max Roads
1082_Array_Queries	LightOj	segment tree	1082_Array_Queries
1183_Computing_Fast_Average	LightOj	Segment tree	1183_Computing_Fast_Average
1188 Fast Queries	LightOj	offline	1188 Fast Queries
Nothing Is Absolute, Everything Is Relative!	Toph	Basic	Nothing Is Absolute, Everything Is Relative!
Standard Template Library
Creating Strings	CSES	next_permutation	Creating Strings
1023 Discovering Permutations	LightOj	next_permutation	1023 Discovering Permutations
ONP - Transform the Expression	spoj	stack	ONP - Transform the Expression
TRYCOMP - Try to complete	spoj	Trie	TRYCOMP - Try to complete
String
Test	Codeforces	KMP LPS	Test
Ternery Search
1146 Closest Distance	LightOj	geometry	1146 Closest Distance