Problemset - Codeforces

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Educational Codeforces Round 167 (Rated for Div. 2)
23:02:19
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Problems

#	Name
1958C	Firewood *special problem	1500	x558
1958B	Clock in the Pool *special problem, math	1400	x721
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x336
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x395
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1097
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3999
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8503
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x299
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x736
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1323
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3498
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11656
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1109
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3892
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6352
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7758
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x13859
1954F	Unique Strings combinatorics, dp, math	3100	x227
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x1963
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5376
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x70
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x228
1951G	Clacking Balls combinatorics, math, probabilities	3100	x285
1951F	Inversion Composition constructive algorithms, data structures, greedy	2500	x694
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3253
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5025
1951C	Ticket Hoarding greedy, math, sortings	1400	x10506
1950G	Shuffling Songs bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings	1900	x3822
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x8235
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12998
1949K	Make Triangle constructive algorithms, math	2800	x263
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers	2600	x334
1949I	Disks dfs and similar, geometry, graph matchings, graphs	1800	x1387
1949H	Division Avoidance greedy, math	3100	x78
1949G	Scooter graphs, greedy	2300	x675
1949F	Dating greedy, sortings, trees	2200	x826
1949E	Damage per Second brute force, math	2900	x89
1949D	Funny or Scary? constructive algorithms	2600	x321
1949C	Annual Ants' Gathering dfs and similar, dp, greedy, trees	1900	x1398
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2408
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x94
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x653
1948F	Rare Coins combinatorics, math, probabilities	2500	x1193
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2742
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8598
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x821
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2222
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4271
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x9685
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x551
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x674
1945F	Kirill and Mushrooms data structures, sortings	1900	x3801
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x7414
1943F	Minimum Hamming Distance dp	3500	x89
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x261
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x391
1943D2	Counting Is Fun (Hard Version) combinatorics, dp	2800	x641
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1318
1943C	Tree Compass constructive algorithms, dfs and similar, greedy, trees	2300	x1898
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3500
1942H	Farmer John's Favorite Intern data structures, dp, flows, trees	3500	x72
1942G	Bessie and Cards combinatorics, dp, math	2800	x400
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x614
1942E	Farm Game combinatorics, games	2300	x1527
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x2563
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5747
1941G	Rudolf and Subway constructive algorithms, dfs and similar, graphs, shortest paths	2000	x3173
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x5455
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x8661
1938M	Zig-zag	3500	x47
1938L	XOR Operations	2800	x256
1938K	Tree Quiz	2400	x543
1938J	There and Back Again	2100	x1141
1938I	Symmetric Boundary	2800	x55
1938H	Pho Restaurant	1600	x1926
1938G	Personality Test	2300	x892
1938F	Forming Groups	2400	x670
1938E	Duplicates	2200	x883
1938D	Bánh Bò	3300	x82
1938C	Bit Counting Sequence	1900	x1306
1938B	Attraction Score	3000	x171
1938A	Antiparticle Antiphysics	3500	x43
1936F	Grand Finale: Circles binary search, geometry	3300	x74
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x101
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x446
1936C	Pokémon Arena data structures, graphs, greedy, implementation, shortest paths, sortings	2400	x1156
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2566
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6842
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x411
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1220
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7626
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7471
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x198
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1250
1934D1	XOR Break --- Solo Version bitmasks, constructive algorithms, greedy	2100	x3208
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6258
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x909
1933F	Turtle Mission: Robot and the Earthquake dfs and similar, dp, graphs, shortest paths	2100	x2292
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10253
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x926