Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38347
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35157
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x30938
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x28932
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28028
1743A	Password brute force, combinatorics, implementation, math	800	x26006
1674B	Dictionary combinatorics, math	800	x25559
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x25001
1840C	Ski Resort combinatorics, math, two pointers	1000	x24391
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23551
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22845
1543B	Customising the Track combinatorics, greedy, math	900	x22626
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22587
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x21974
610A	Pasha and Stick combinatorics, math	1000	x21956
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21544
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21402
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21002
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20763
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20713
630C	Lucky Numbers combinatorics, math	1100	x20343
1475C	Ball in Berland combinatorics, graphs, math	1400	x19898
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19568
1821A	Matching combinatorics, math	800	x19314
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19190
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18826
1582B	Luntik and Subsequences combinatorics, math	900	x18704
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18342
1433E	Two Round Dances combinatorics, math	1300	x17989
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17373
617B	Chocolate combinatorics	1300	x17272
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x16986
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x16951
1777B	Emordnilap combinatorics, greedy, math	900	x16548
251A	Points on Line binary search, combinatorics, two pointers	1300	x16536
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x15918
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15770
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15585
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15206
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14939
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14776
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14527
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14378
1166A	Silent Classroom combinatorics, greedy	900	x13836
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13684
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13516
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13236
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13164
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13088
1475E	Advertising Agency combinatorics, math, sortings	1600	x12828
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12468
1288C	Two Arrays combinatorics, dp	1600	x12256
1215B	The Number of Products combinatorics, dp, implementation	1400	x12035
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11972
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11814
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11685
1569C	Jury Meeting combinatorics, math	1500	x11626
584B	Kolya and Tanya combinatorics	1500	x11564
322B	Ciel and Flowers combinatorics, math	1600	x11470
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x11422
1178C	Tiles combinatorics, greedy, math	1300	x11271
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11127
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10840
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10774
1236B	Alice and the List of Presents combinatorics, math	1500	x10618
131C	The World is a Theatre combinatorics, math	1400	x10614
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10580
1436C	Binary Search binary search, combinatorics	1500	x10515
1096B	Substring Removal combinatorics, math, strings	1300	x10323
152C	Pocket Book combinatorics	1400	x10243
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10111
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9898
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9771
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9511
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9376
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9369
978E	Bus Video System combinatorics, math	1400	x9197
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9185
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9038
1312D	Count the Arrays combinatorics, math	1700	x8895
300C	Beautiful Numbers brute force, combinatorics	1800	x8839
1762C	Binary Strings are Fun combinatorics, math	1400	x8817
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8680
1907E	Good Triples brute force, combinatorics, number theory	1600	x8675
1036C	Classy Numbers combinatorics, dp	1900	x8512
1327E	Count The Blocks combinatorics, dp, math	1800	x8486
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8440
1795D	Triangle Coloring combinatorics, math	1600	x8406
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8380
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8367
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8311
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8302
1422C	Bargain combinatorics, dp, math	1700	x8065
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8020
1452D	Radio Towers combinatorics, dp, math	1600	x7742
1284C	New Year and Permutation combinatorics, math	1600	x7689
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7659
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7585
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7503
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7433

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