Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
28:42:48
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Before contest
Codeforces Round 941 (Div. 2)
28:42:48
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combinatorics

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Problems

#	Name
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2330
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2337
1073E	Segment Sum bitmasks, combinatorics, dp, math	2300	x2374
1167E	Range Deleting binary search, combinatorics, data structures, two pointers	2100	x2391
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2404
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2444
1824B2	LuoTianyi and the Floating Islands (Hard Version) combinatorics, dfs and similar, math, probabilities, trees	2300	x2475
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2483
1228E	Another Filling the Grid combinatorics, dp, math	2300	x2486
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2526
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2531
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2533
1185G1	Playlist for Polycarp (easy version) bitmasks, combinatorics, dp	2100	x2552
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2574
272D	Dima and Two Sequences combinatorics, math, sortings	1600	x2581
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2589
630G	Challenge Pennants combinatorics, math	1600	x2617
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2631
1671E	Preorder combinatorics, divide and conquer, dp, dsu, hashing, sortings, trees	2100	x2639
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2640
626D	Jerry's Protest brute force, combinatorics, dp, probabilities	1800	x2647
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2653
932E	Team Work combinatorics, dp, math	2400	x2678
839D	Winter is here combinatorics, dp, math, number theory	2200	x2682
128C	Games with Rectangle combinatorics, dp	2000	x2687
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2701
383E	Vowels combinatorics, divide and conquer, dp	2700	x2711
319A	Malek Dance Club combinatorics, math	1600	x2752
1342E	Placing Rooks combinatorics, fft, math	2300	x2804
466D	Increase Sequence combinatorics, dp	2100	x2831
288B	Polo the Penguin and Houses combinatorics	1500	x2844
997B	Roman Digits brute force, combinatorics, dp, greedy, math	2000	x2856
1648C	Tyler and Strings combinatorics, data structures, implementation	1900	x2857
1009E	Intercity Travelling combinatorics, math, probabilities	2000	x2882
1644E	Expand the Path brute force, combinatorics, data structures, implementation, math	1900	x2957
900D	Unusual Sequences bitmasks, combinatorics, dp, math, number theory	2000	x2969
803F	Coprime Subsequences bitmasks, combinatorics, number theory	2000	x2981
1181C	Flag brute force, combinatorics, dp, implementation	1900	x3000
1628D1	Game on Sum (Easy Version) combinatorics, dp, games, math	2100	x3006
1151E	Number of Components combinatorics, data structures, dp, math	2100	x3025
500D	New Year Santa Network combinatorics, dfs and similar, graphs, trees	1900	x3061
652C	Foe Pairs combinatorics, sortings, two pointers	1800	x3066
1271E	Common Number binary search, combinatorics, dp, math	2100	x3108
327C	Magic Five combinatorics, math	1700	x3108
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3183
1673D	Lost Arithmetic Progression combinatorics, math, number theory	1900	x3185
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3199
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3212
374B	Inna and Nine combinatorics, greedy	1500	x3229
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3231
893E	Counting Arrays combinatorics, dp, math, number theory	2000	x3252
1787D	Game on Axis combinatorics, dfs and similar, dsu, graphs, implementation	1900	x3253
107B	Basketball Team combinatorics, dp, math, probabilities	1600	x3277
1886D	Monocarp and the Set combinatorics, data structures, math	2100	x3303
1606E	Arena combinatorics, dp, math	2100	x3324
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3334
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3350
991E	Bus Number brute force, combinatorics, math	1800	x3400
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3514
1467D	Sum of Paths combinatorics, dp, math	2200	x3537
1332E	Height All the Same combinatorics, constructive algorithms, math, matrices	2100	x3551
914C	Travelling Salesman and Special Numbers brute force, combinatorics, dp	1800	x3588
9D	How many trees? combinatorics, divide and conquer, dp	1900	x3653
294C	Shaass and Lights combinatorics, number theory	1900	x3706
1788D	Moving Dots binary search, brute force, combinatorics, math, two pointers	2000	x3709
1172B	Nauuo and Circle combinatorics, dfs and similar, dp, trees	1900	x3715
124B	Permutations brute force, combinatorics, implementation	1400	x3742
1696E	Placing Jinas combinatorics, math	2000	x3818
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3824
1622D	Shuffle combinatorics, math, two pointers	2000	x3869
171B	Star *special problem, combinatorics	1300	x3935
1000D	Yet Another Problem On a Subsequence combinatorics, dp	1900	x3941
150B	Quantity of Strings combinatorics, dfs and similar, graphs, math	1600	x3946
1366E	Two Arrays binary search, brute force, combinatorics, constructive algorithms, dp, two pointers	2100	x3951
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x3965
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4050
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4059
340C	Tourist Problem combinatorics, implementation, math	1600	x4099
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4101
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4142
1717D	Madoka and The Corruption Scheme combinatorics, constructive algorithms, greedy, math	1900	x4241
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4296
1824B1	LuoTianyi and the Floating Islands (Easy Version) combinatorics, math, probabilities, trees	1800	x4307
711D	Directed Roads combinatorics, dfs and similar, graphs, math	1900	x4347
869C	The Intriguing Obsession combinatorics, dp, math	1800	x4349
552D	Vanya and Triangles brute force, combinatorics, data structures, geometry, math, sortings	1900	x4351
1043D	Mysterious Crime brute force, combinatorics, math, meet-in-the-middle, two pointers	1700	x4366
894B	Ralph And His Magic Field combinatorics, constructive algorithms, math, number theory	1800	x4369
1195D2	Submarine in the Rybinsk Sea (hard edition) combinatorics, math, number theory	1800	x4411
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x4450
986B	Petr and Permutations combinatorics, math	1800	x4553
364A	Matrix combinatorics, data structures, implementation	1600	x4590
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x4663
630H	Benches combinatorics, math	1400	x4733
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x4862
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x4864
479E	Riding in a Lift combinatorics, dp	1900	x4926
1371E1	Asterism (Easy Version) binary search, brute force, combinatorics, math, number theory, sortings	1900	x4947
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5088
895C	Square Subsets bitmasks, combinatorics, dp, math	2000	x5104