Problemset - Codeforces

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Codeforces Round (Div. 3)
7 days

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Problems

#	Name
1783A	Make it Beautiful constructive algorithms, math, sortings	800	x28049
1781H2	Window Signals (hard version)	3500	x88
1781H1	Window Signals (easy version)	3200	x114
1781G	Diverse Coloring constructive algorithms, trees	3200	x217
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x746
1781E	Rectangle Shrinking binary search, brute force, data structures, greedy, implementation, two pointers	2300	x1273
1781D	Many Perfect Squares brute force, math, number theory	1800	x5325
1781C	Equal Frequencies brute force, constructive algorithms, greedy, implementation, sortings, strings	1600	x7199
1781B	Going to the Cinema brute force, greedy, sortings	1000	x13318
1781A	Parallel Projection geometry, math	800	x14931
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x678
1780F	Three Chairs bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings	2300	x1402
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1325
1780D	Bit Guessing Game binary search, bitmasks, constructive algorithms, interactive	1800	x4721
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16962
1780A	Hayato and School constructive algorithms, greedy	800	x21180
1779H	Olympic Team Building brute force, meet-in-the-middle	3500	x133
1779G	The Game of the Century constructive algorithms, graphs, shortest paths	3000	x306
1779F	Xorcerer's Stones bitmasks, constructive algorithms, dp, trees	2500	x1225
1779E	Anya's Simultaneous Exhibition constructive algorithms, graphs, greedy, interactive, sortings	2400	x1708
1779D	Boris and His Amazing Haircut constructive algorithms, data structures, dp, dsu, greedy, sortings	1700	x7600
1779C	Least Prefix Sum data structures, greedy	1600	x11981
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x23137
1779A	Hall of Fame constructive algorithms, greedy, strings	800	x22950
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x607
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x832
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2588
1778C	Flexible String bitmasks, brute force, strings	1600	x7798
1778B	The Forbidden Permutation greedy, math	1300	x13014
1778A	Flip Flop Sum greedy, implementation	800	x23864
1777F	Comfortably Numb bitmasks, data structures, divide and conquer, strings, trees	2400	x835
1777E	Edge Reverse binary search, dfs and similar, graphs, trees	2200	x1724
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3289
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7978
1777B	Emordnilap combinatorics, greedy, math	900	x16785
1777A	Everybody Likes Good Arrays! greedy, math	800	x22153
1776N	Count Permutations math	3500	x73
1776M	Parmigiana With Seafood binary search, dp, greedy, trees	3000	x357
1776L	Controllers binary search, math	1500	x5402
1776K	Uniform Chemistry dp, math	3200	x65
1776J	Italian Data Centers graphs, shortest paths	2500	x613
1776I	Spinach Pizza games, geometry, greedy, interactive	2500	x642
1776H	Beppa and SwerChat two pointers	1300	x6109
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1970
1776F	Train Splitting constructive algorithms, graphs, greedy	1700	x3290
1776E	Crossing the Railways data structures, dp	3500	x63
1776D	Teamwork constructive algorithms, greedy, math	2800	x346
1776C	Library game games, greedy, interactive, sortings	2500	x763
1776B	Vittorio Plays with LEGO Bricks dp, geometry	2200	x1255
1776A	Walking Boy greedy	800	x6809
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x750
1775E	The Human Equation greedy, implementation	2100	x3070
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5891
1775C	Interesting Sequence bitmasks, math	1600	x9865
1775B	Gardener and the Array bitmasks, constructive algorithms	1300	x12926
1775A2	Gardener and the Capybaras (hard version) constructive algorithms, greedy	900	x18381
1775A1	Gardener and the Capybaras (easy version) brute force, constructive algorithms, implementation	800	x19385
1774H	Maximum Permutation constructive algorithms	3500	x130
1774G	Segment Covering brute force, combinatorics, constructive algorithms, data structures, dp, trees	3200	x395
1774F2	Magician and Pigs (Hard Version) binary search, brute force, data structures, implementation	2700	x645
1774F1	Magician and Pigs (Easy Version) brute force, data structures, implementation	2400	x1026
1774E	Two Chess Pieces dfs and similar, dp, greedy, trees	1900	x3365
1774D	Same Count One brute force, constructive algorithms, greedy, implementation, two pointers	1600	x7518
1774C	Ice and Fire constructive algorithms, dp, greedy	1300	x11697
1774B	Coloring constructive algorithms, greedy, math	1500	x11753
1774A	Add Plus Minus Sign constructive algorithms, math	800	x22104
1773L	Lisa's Sequences dp	3500	x30
1773K	King's Puzzle constructive algorithms	1900	x1386
1773J	Jumbled Trees constructive algorithms, math	2900	x104
1773I	Interactive Factorial Guessing brute force, games, implementation, interactive	2500	x461
1773H	Hot and Cold binary search, interactive	2600	x346
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x325
1773F	Football constructive algorithms	800	x3981
1773E	Easy Assembly greedy, sortings	1400	x4723
1773D	Dominoes combinatorics, flows, graph matchings, greedy	2600	x433
1773C	Cactus Meets Torus	3500	x30
1773B	BinCoin binary search, divide and conquer, hashing, implementation, probabilities, trees	2200	x739
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1494
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1291
1772F	Copy of a Copy of a Copy constructive algorithms, dfs and similar, graphs, implementation, sortings	2000	x2260
1772E	Permutation Game games	1700	x6510
1772D	Absolute Sorting constructive algorithms, math	1400	x15211
1772C	Different Differences constructive algorithms, greedy, math	1000	x22907
1772B	Matrix Rotation brute force, implementation	800	x28457
1772A	A+B? implementation	800	x44882
1771F	Hossam and Range Minimum Query binary search, bitmasks, data structures, hashing, probabilities, strings, trees	2500	x991
1771E	Hossam and a Letter brute force, dp, implementation, two pointers	2500	x668
1771D	Hossam and (sub-)palindromic tree brute force, data structures, dfs and similar, dp, strings, trees	2100	x2630
1771C	Hossam and Trainees greedy, math, number theory	1600	x9226
1771B	Hossam and Friends binary search, constructive algorithms, dp, two pointers	1400	x13311
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22268
1770H	Koxia, Mahiru and Winter Festival constructive algorithms	3500	x100
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x155
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x626
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1310
1770D	Koxia and Game constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation	2000	x3699
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8350
1770B	Koxia and Permutation constructive algorithms	1000	x19104
1770A	Koxia and Whiteboards brute force, greedy	1000	x23031
1769D3	Игра в Девятку III *special problem, brute force	2300	x118