Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
08:37:05
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Problems

#	Name
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1196
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1735
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3161
1943A	MEX Game 1 games, greedy	1300	x14921
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x55
1942G	Bessie and Cards combinatorics, dp, math	2800	x352
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x536
1942E	Farm Game combinatorics, games	2300	x1408
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2364
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5387
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x9311
1942B	Bessie and MEX constructive algorithms, math	1100	x12037
1942A	Farmer John's Challenge constructive algorithms, math	800	x15346
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x2876
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5096
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8018
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x16350
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x29275
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26040
1941A	Rudolf and the Ticket brute force, math	800	x38465
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x123
1940C	Burenka and Pether *special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees		x32
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x173
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x78
1939D	Big Persimmon *special problem, dp, games		x59
1939C	More Gifts *special problem, dfs and similar, two pointers		x272
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x208
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x14
1938M	Zig-zag	3500	x44
1938L	XOR Operations	2800	x244
1938K	Tree Quiz	2400	x527
1938J	There and Back Again	2100	x1102
1938I	Symmetric Boundary	2800	x51
1938H	Pho Restaurant	1600	x1836
1938G	Personality Test	2300	x861
1938F	Forming Groups	2400	x632
1938E	Duplicates	2200	x847
1938D	Bánh Bò	3300	x77
1938C	Bit Counting Sequence	1900	x1238
1938B	Attraction Score	3000	x146
1938A	Antiparticle Antiphysics	3500	x36
1937B	Binary Path dp, greedy, implementation	1300	x12909
1937A	Shuffle Party implementation, math	800	x21272
1936F	Grand Finale: Circles binary search, geometry	3300	x64
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x93
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x404
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1060
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2379
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6480
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x384
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1149
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7237
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7043
1935B	Informatics in MAC constructive algorithms	1200	x16252
1935A	Entertainment in MAC constructive algorithms, strings	800	x25245
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x179
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1169
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3022
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x5967
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x16417
1934A	Too Min Too Max greedy, math	800	x23146
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x852
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2165
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x9562
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17524
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20248
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29606
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x35100
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x863
1932F	Feed Cats data structures, dp, sortings	1900	x3322
1932E	Final Countdown implementation, math, number theory	1600	x6666
1932D	Card Game greedy, implementation	1400	x9753
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13453
1932B	Chaya Calendar number theory	1100	x18179
1932A	Thorns and Coins dp, greedy, implementation	800	x26356
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2414
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x6863
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x13161
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15649
1931C	Make Equal Again brute force, greedy, math	1000	x25817
1931B	Make Equal greedy	800	x29791
1931A	Recovering a Small String brute force, strings	800	x33338
1930I	Counting Is Fun combinatorics	3500	x49
1930H	Interactive Mex Tree constructive algorithms, dfs and similar, interactive, trees	3300	x118
1930G	Prefix Max Set Counting data structures, dp, trees	3100	x243
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x601
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x976
1930D2	Sum over all Substrings (Hard Version) bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings	2100	x2341
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3650
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x6339
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13440
1930A	Maximise The Score greedy, sortings	800	x17005
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1608
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1480
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4109
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13099
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x23640
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x28695
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x207
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1512