Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
39:44:29
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Problems

#	Name
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x11217
1946B	Maximum Sum dp, greedy, math	1100	x20751
1946A	Median of an Array greedy, implementation, sortings	800	x26345
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x695
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x756
1945F	Kirill and Mushrooms data structures, sortings	1900	x4323
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x8396
1945D	Seraphim the Owl dp, greedy	1300	x14846
1945C	Left and Right Houses brute force	1200	x15253
1945B	Fireworks math, number theory	900	x23120
1945A	Setting up Camp greedy, math	800	x28074
1944B	Equal XOR bitmasks, constructive algorithms	1100	x16453
1944A	Destroying Bridges graphs, greedy, math	800	x24206
1943F	Minimum Hamming Distance dp	3500	x115
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x309
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x446
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x829
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1538
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x2172
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3936
1943A	MEX Game 1 games, greedy	1300	x18378
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x99
1942G	Bessie and Cards combinatorics, dp, math	2800	x461
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x712
1942E	Farm Game combinatorics, games	2300	x1714
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2856
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x6255
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x11176
1942B	Bessie and MEX constructive algorithms, math	1100	x14202
1942A	Farmer John's Challenge constructive algorithms, math	800	x17465
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3651
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x6208
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x9978
1941D	Rudolf and the Ball Game dfs and similar, dp, implementation	1200	x18764
1941C	Rudolf and the Ugly String dp, greedy, strings	900	x34163
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x30552
1941A	Rudolf and the Ticket brute force, math	800	x43159
1940D	Almost Certainly *special problem, constructive algorithms, data structures, sortings		x144
1940C	Burenka and Pether *special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees		x35
1940B	Three Arrays *special problem, constructive algorithms, implementation, sortings		x209
1940A	Parallel Universes *special problem, constructive algorithms, dfs and similar, dsu, graphs		x84
1939D	Big Persimmon *special problem, dp, games		x101
1939C	More Gifts *special problem, dfs and similar, two pointers		x320
1939B	Evidence Board *special problem, constructive algorithms, dfs and similar, graphs, trees		x248
1939A	Draw Polygon Lines *special problem, constructive algorithms, dp, geometry, interactive		x24
1938M	Zig-zag	3500	x63
1938L	XOR Operations	2800	x296
1938K	Tree Quiz	2400	x644
1938J	There and Back Again	2100	x1323
1938I	Symmetric Boundary	2800	x77
1938H	Pho Restaurant	1600	x2215
1938G	Personality Test	2300	x1079
1938F	Forming Groups	2400	x779
1938E	Duplicates	2200	x1035
1938D	Bánh Bò	3300	x92
1938C	Bit Counting Sequence	1900	x1507
1938B	Attraction Score	3000	x201
1938A	Antiparticle Antiphysics	3500	x57
1937B	Binary Path dp, greedy, implementation	1300	x15333
1937A	Shuffle Party implementation, math	800	x23393
1936F	Grand Finale: Circles binary search, geometry	3300	x147
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x125
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x530
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1363
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x3022
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x7613
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x457
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1409
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x8425
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x8371
1935B	Informatics in MAC constructive algorithms	1200	x18943
1935A	Entertainment in MAC constructive algorithms, strings	800	x28395
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x243
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1417
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3597
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6975
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x19350
1934A	Too Min Too Max greedy, math	800	x25731
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x995
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2547
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x11562
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x20714
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x23014
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x33351
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x38696
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x1113
1932F	Feed Cats data structures, dp, sortings	1900	x4284
1932E	Final Countdown implementation, math, number theory	1600	x8464
1932D	Card Game greedy, implementation	1400	x11721
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x16132
1932B	Chaya Calendar number theory	1100	x21174
1932A	Thorns and Coins dp, greedy, implementation	800	x30236
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2921
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x8264
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x16515
1931D	Divisible Pairs combinatorics, math, number theory	1300	x19731
1931C	Make Equal Again brute force, greedy, math	1000	x29715
1931B	Make Equal greedy	800	x32691
1931A	Recovering a Small String brute force, strings	800	x36750
1930I	Counting Is Fun combinatorics	3500	x75