Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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Problems

#	Name
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x7848
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16146
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x28930
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x25683
1941A	Rudolf and the Ticket brute force, math	800	x38060
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x121
1940C	Burenka and Pether *special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees		x30
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x169
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1939D	Big Persimmon *special problem, dp, games		x58
1939C	More Gifts *special problem, dfs and similar, two pointers		x269
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x205
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1938M	Zig-zag	3500	x44
1938L	XOR Operations	2800	x242
1938K	Tree Quiz	2400	x520
1938J	There and Back Again	2100	x1086
1938I	Symmetric Boundary	2800	x51
1938H	Pho Restaurant	1600	x1808
1938G	Personality Test	2300	x846
1938F	Forming Groups	2400	x621
1938E	Duplicates	2200	x830
1938D	Bánh Bò	3300	x75
1938C	Bit Counting Sequence	1900	x1217
1938B	Attraction Score	3000	x145
1938A	Antiparticle Antiphysics	3500	x35
1937B	Binary Path dp, greedy, implementation	1300	x12726
1937A	Shuffle Party implementation, math	800	x21030
1936F	Grand Finale: Circles binary search, geometry	3300	x62
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x89
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x394
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1029
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2333
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6378
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x358
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1120
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7116
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x6932
1935B	Informatics in MAC constructive algorithms	1200	x16022
1935A	Entertainment in MAC constructive algorithms, strings	800	x25002
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x162
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1145
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x2972
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x5892
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x16196
1934A	Too Min Too Max greedy, math	800	x22911
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x837
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2123
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9410
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17341
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20052
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29366
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x34800
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x847
1932F	Feed Cats data structures, dp, sortings	1900	x3259
1932E	Final Countdown implementation, math, number theory	1600	x6517
1932D	Card Game greedy, implementation	1400	x9601
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13267
1932B	Chaya Calendar number theory	1100	x18000
1932A	Thorns and Coins dp, greedy, implementation	800	x26122
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2387
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x6783
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13000
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15461
1931C	Make Equal Again brute force, greedy, math	1000	x25582
1931B	Make Equal greedy	800	x29587
1931A	Recovering a Small String brute force, strings	800	x33137
1930I	Counting Is Fun combinatorics	3500	x48
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x111
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x212
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x587
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x961
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2318
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3612
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6279
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13274
1930A	Maximise The Score greedy, sortings	800	x16851
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1590
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1465
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4064
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x12981
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x23495
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x28518
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x201
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1492
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3661
1928C	Physical Education Lesson brute force, math, number theory	1600	x7280
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x14943
1928A	Rectangle Cutting geometry, math	800	x20869
1927G	Paint Charges data structures, dp, greedy, math	2300	x1461
1927F	Microcycle data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees	1900	x3660
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x12140
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x17901
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25161
1927B	Following the String constructive algorithms, greedy, strings	900	x29869
1927A	Make it White greedy, strings	800	x39149
1926G	Vlad and Trouble at MIT dfs and similar, dp, flows, graphs, greedy, implementation, trees	1900	x2851
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1423
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9655
1926D	Vlad and Division bitmasks, greedy	1300	x13195