Problemset - Codeforces

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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38475
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35256
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31074
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x29043
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28129
1743A	Password brute force, combinatorics, implementation, math	800	x26093
1674B	Dictionary combinatorics, math	800	x25618
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x25106
1840C	Ski Resort combinatorics, math, two pointers	1000	x24581
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23747
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22915
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22780
1543B	Customising the Track combinatorics, greedy, math	900	x22659
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22038
610A	Pasha and Stick combinatorics, math	1000	x22011
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21626
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21506
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21015
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20843
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20792
630C	Lucky Numbers combinatorics, math	1100	x20401
1475C	Ball in Berland combinatorics, graphs, math	1400	x19963
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19595
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19379
1821A	Matching combinatorics, math	800	x19360
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18987
1582B	Luntik and Subsequences combinatorics, math	900	x18819
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18364
1433E	Two Round Dances combinatorics, math	1300	x18026
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17460
617B	Chocolate combinatorics	1300	x17318
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17028
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17020
251A	Points on Line binary search, combinatorics, two pointers	1300	x16594
1777B	Emordnilap combinatorics, greedy, math	900	x16580
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x16012
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15797
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15784
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15263
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14964
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14898
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14549
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14412
1166A	Silent Classroom combinatorics, greedy	900	x13964
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13738
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13602
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13245
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13192
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13120
1475E	Advertising Agency combinatorics, math, sortings	1600	x12879
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12485
1288C	Two Arrays combinatorics, dp	1600	x12286
1215B	The Number of Products combinatorics, dp, implementation	1400	x12079
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11984
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11836
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11749
1569C	Jury Meeting combinatorics, math	1500	x11656
584B	Kolya and Tanya combinatorics	1500	x11589
322B	Ciel and Flowers combinatorics, math	1600	x11493
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x11472
1178C	Tiles combinatorics, greedy, math	1300	x11361
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11204
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10857
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10785
1236B	Alice and the List of Presents combinatorics, math	1500	x10669
131C	The World is a Theatre combinatorics, math	1400	x10645
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10590
1436C	Binary Search binary search, combinatorics	1500	x10525
1096B	Substring Removal combinatorics, math, strings	1300	x10334
152C	Pocket Book combinatorics	1400	x10255
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10136
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9910
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9799
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9519
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9415
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9400
978E	Bus Video System combinatorics, math	1400	x9227
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9216
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9057
1312D	Count the Arrays combinatorics, math	1700	x8953
300C	Beautiful Numbers brute force, combinatorics	1800	x8867
1762C	Binary Strings are Fun combinatorics, math	1400	x8847
1907E	Good Triples brute force, combinatorics, number theory	1600	x8784
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8700
1036C	Classy Numbers combinatorics, dp	1900	x8585
1327E	Count The Blocks combinatorics, dp, math	1800	x8554
1795D	Triangle Coloring combinatorics, math	1600	x8469
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8462
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8401
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8375
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8338
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8329
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8074
1422C	Bargain combinatorics, dp, math	1700	x8074
1452D	Radio Towers combinatorics, dp, math	1600	x7757
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7730
1284C	New Year and Permutation combinatorics, math	1600	x7711
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7616
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7531
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7503

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