Problemset - Codeforces

Problems

#	Name
1621G	Weighted Increasing Subsequences data structures, dp, math	3200	x657
1621F	Strange Instructions data structures, greedy, implementation	2700	x555
1621E	New School binary search, data structures, dp, greedy, implementation, sortings	2300	x1769
1621D	The Winter Hike constructive algorithms, greedy, math	2100	x4094
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x6945
1621B	Integers Shop data structures, greedy, implementation	1500	x13484
1621A	Stable Arrangement of Rooks constructive algorithms	800	x23883
1620G	Subsequences Galore bitmasks, combinatorics, dp	2400	x917
1620F	Bipartite Array dp, greedy	2800	x621
1620E	Replace the Numbers constructive algorithms, data structures, dsu, implementation	1900	x8367
1620D	Exact Change brute force, constructive algorithms, greedy	2000	x4242
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x6617
1620B	Triangles on a Rectangle geometry, greedy, math	1000	x21585
1620A	Equal or Not Equal constructive algorithms, dsu, implementation	800	x21667
1619H	Permutation and Queries brute force, data structures, divide and conquer, two pointers	2400	x1172
1619G	Unusual Minesweeper binary search, dfs and similar, dsu, greedy, sortings	2000	x2429
1619F	Let's Play the Hat? brute force, constructive algorithms, greedy, math	2000	x2118
1619E	MEX and Increments constructive algorithms, data structures, dp, greedy, implementation, math, sortings	1700	x9285
1619D	New Year's Problem binary search, greedy, sortings	1800	x7640
1619C	Wrong Addition implementation	1200	x21139
1619B	Squares and Cubes implementation, math	800	x31042
1619A	Square String? implementation, strings	800	x52651
1618G	Trader Problem data structures, dsu, greedy, sortings	2200	x1616
1618F	Reverse bitmasks, constructive algorithms, dfs and similar, implementation, math, strings	2000	x4293
1618E	Singers' Tour constructive algorithms, math	1700	x7259
1618D	Array and Operations dp, greedy, math	1300	x19094
1618C	Paint the Array math	1100	x23447
1618B	Missing Bigram implementation	800	x22760
1618A	Polycarp and Sums of Subsequences math, sortings	800	x32505
1617E	Christmas Chocolates dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees	2700	x883
1617D2	Too Many Impostors (hard version) constructive algorithms, implementation, interactive, math	2400	x1805
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x4727
1617C	Paprika and Permutation binary search, greedy, math, sortings	1300	x15073
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x23608
1617A	Forbidden Subsequence constructive algorithms, greedy, sortings, strings	800	x16309
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x993
1616G	Just Add an Edge dfs and similar, dp, graphs	3500	x284
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x598
1616E	Lexicographically Small Enough brute force, data structures, greedy, strings	2200	x2507
1616D	Keep the Average High dp, greedy, math	2000	x4938
1616C	Representative Edges brute force, geometry, implementation, math	1500	x12306
1616B	Mirror in the String greedy, strings	1100	x19755
1616A	Integer Diversity implementation	800	x22844
1615H	Reindeer Games binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths	3000	x331
1615G	Maximum Adjacent Pairs constructive algorithms, graph matchings	3300	x153
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x897
1615E	Purple Crayon data structures, dfs and similar, games, graphs, greedy, math, sortings, trees	2400	x1501
1615D	X(or)-mas Tree bitmasks, dfs and similar, dsu, graphs, trees	2200	x1930
1615C	Menorah brute force, graphs, greedy, math	1600	x8423
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x16106
1615A	Closing The Gap greedy, math	800	x20820
1614E	Divan and a Cottage binary search, data structures	2600	x833
1614D2	Divan and Kostomuksha (hard version) dp, number theory	2300	x2393
1614D1	Divan and Kostomuksha (easy version) dp, number theory	2100	x3970
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x10320
1614B	Divan and a New Project constructive algorithms, sortings	1000	x19644
1614A	Divan and a Store brute force, constructive algorithms, greedy	800	x23520
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x698
1613E	Crazy Robot dfs and similar, graphs	2000	x5220
1613D	MEX Sequences dp, math	1900	x4744
1613C	Poisoned Dagger binary search	1200	x24891
1613B	Absent Remainder greedy, implementation, sortings	1000	x21808
1613A	Long Comparison implementation, math	900	x24694
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x863
1612F	Armor and Weapons brute force, dp, greedy, shortest paths	2800	x619
1612E	Messages brute force, dp, greedy, probabilities, sortings	2000	x2536
1612D	X-Magic Pair math, number theory	1600	x9289
1612C	Chat Ban binary search, math	1300	x17836
1612B	Special Permutation constructive algorithms, greedy	900	x17304
1612A	Distance brute force, constructive algorithms	800	x17708
1611G	Robot and Candies data structures, graph matchings, greedy	2500	x649
1611F	ATM and Students binary search, data structures, two pointers	1800	x6511
1611E2	Escape The Maze (hard version) dfs and similar, dp, greedy, shortest paths, trees	1900	x3854
1611E1	Escape The Maze (easy version) dfs and similar, greedy, shortest paths, trees, two pointers	1700	x7378
1611D	Weights Assignment For Tree Edges constructive algorithms, trees	1500	x9951
1611C	Polycarp Recovers the Permutation constructive algorithms	1000	x18468
1611B	Team Composition: Programmers and Mathematicians binary search, constructive algorithms, math	800	x29826
1611A	Make Even constructive algorithms, math	800	x31607
1610I	Mashtali vs AtCoder games, trees	3100	x286
1610H	Squid Game data structures, dfs and similar, greedy, trees	3100	x503
1610G	AmShZ Wins a Bet data structures, greedy, hashing	3300	x466
1610F	Mashtali: a Space Oddysey constructive algorithms, dfs and similar, graphs	3000	x543
1610E	AmShZ and G.O.A.T. binary search, brute force, greedy, implementation, math	2300	x1707
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2735
1610C	Keshi Is Throwing a Party binary search, greedy	1600	x11742
1610B	Kalindrome Array greedy, two pointers	1100	x16199
1610A	Anti Light's Cell Guessing math	900	x16150
1609H	Pushing Robots	3500	x93
1609G	A Stroll Around the Matrix data structures, greedy, math	3000	x405
1609F	Interesting Sections data structures, divide and conquer, meet-in-the-middle, two pointers	2800	x802
1609E	William The Oblivious bitmasks, data structures, dp, matrices	2400	x2138
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x7358
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9806
1609B	William the Vigilant implementation, strings	1100	x11730
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x17193
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x161
1608F	MEX counting combinatorics, dp, implementation	3200	x610
1608E	The Cells on the Paper binary search, implementation, sortings	2800	x442
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1403
1608C	Game Master data structures, dfs and similar, dp, graphs, greedy, two pointers	1700	x6739