Problemset - Codeforces

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Codeforces Round 950 (Div. 3)
2 days
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Problems

#	Name
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x250
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x380
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x624
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1287
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1850
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3407
1943A	MEX Game 1 games, greedy	1300	x15780
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x67
1942G	Bessie and Cards combinatorics, dp, math	2800	x381
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x585
1942E	Farm Game combinatorics, games	2300	x1480
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2492
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5611
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x9823
1942B	Bessie and MEX constructive algorithms, math	1100	x12621
1942A	Farmer John's Challenge constructive algorithms, math	800	x16026
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3049
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5313
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8394
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16917
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x30303
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26964
1941A	Rudolf and the Ticket brute force, math	800	x39517
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x125
1940C	Burenka and Pether *special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees		x33
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x177
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x81
1939D	Big Persimmon *special problem, dp, games		x84
1939C	More Gifts *special problem, dfs and similar, two pointers		x278
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x210
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x20
1938M	Zig-zag	3500	x46
1938L	XOR Operations	2800	x255
1938K	Tree Quiz	2400	x540
1938J	There and Back Again	2100	x1128
1938I	Symmetric Boundary	2800	x55
1938H	Pho Restaurant	1600	x1901
1938G	Personality Test	2300	x886
1938F	Forming Groups	2400	x664
1938E	Duplicates	2200	x871
1938D	Bánh Bò	3300	x79
1938C	Bit Counting Sequence	1900	x1281
1938B	Attraction Score	3000	x150
1938A	Antiparticle Antiphysics	3500	x38
1937B	Binary Path dp, greedy, implementation	1300	x13399
1937A	Shuffle Party implementation, math	800	x21775
1936F	Grand Finale: Circles binary search, geometry	3300	x70
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x98
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x428
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1129
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2504
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6690
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x404
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1195
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7462
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7298
1935B	Informatics in MAC constructive algorithms	1200	x16806
1935A	Entertainment in MAC constructive algorithms, strings	800	x25887
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x187
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1220
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3139
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6145
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x17034
1934A	Too Min Too Max greedy, math	800	x23766
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x894
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2245
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9931
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x18181
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20876
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x30353
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x35915
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x903
1932F	Feed Cats data structures, dp, sortings	1900	x3493
1932E	Final Countdown implementation, math, number theory	1600	x7040
1932D	Card Game greedy, implementation	1400	x10167
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14036
1932B	Chaya Calendar number theory	1100	x18791
1932A	Thorns and Coins dp, greedy, implementation	800	x27225
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2491
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x7089
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13675
1931D	Divisible Pairs combinatorics, math, number theory	1300	x16269
1931C	Make Equal Again brute force, greedy, math	1000	x26558
1931B	Make Equal greedy	800	x30369
1931A	Recovering a Small String brute force, strings	800	x33969
1930I	Counting Is Fun combinatorics	3500	x55
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x128
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x258
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x621
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1013
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2400
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3746
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6501
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13883
1930A	Maximise The Score greedy, sortings	800	x17386
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1661
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1540
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4249
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13517
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24044