Problemset - Codeforces

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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x36343
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x33608
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x28459
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x27494
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x27147
1743A	Password brute force, combinatorics, implementation, math	800	x25280
1674B	Dictionary combinatorics, math	800	x24706
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x23688
1543B	Customising the Track combinatorics, greedy, math	900	x22064
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x21942
1840C	Ski Resort combinatorics, math, two pointers	1000	x21596
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x20993
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x20908
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x20861
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x20814
610A	Pasha and Stick combinatorics, math	1000	x20784
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x20580
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20273
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x20075
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x19580
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19172
630C	Lucky Numbers combinatorics, math	1100	x19037
1475C	Ball in Berland combinatorics, graphs, math	1400	x18997
1821A	Matching combinatorics, math	800	x18407
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18038
1582B	Luntik and Subsequences combinatorics, math	900	x17519
1433E	Two Round Dances combinatorics, math	1300	x17437
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x16637
617B	Chocolate combinatorics	1300	x16511
1777B	Emordnilap combinatorics, greedy, math	900	x15991
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x15937
251A	Points on Line binary search, combinatorics, two pointers	1300	x15784
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x15669
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15146
1326C	Permutation Partitions combinatorics, greedy, math	1300	x14972
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x14566
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14435
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14226
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x13815
1166A	Silent Classroom combinatorics, greedy	900	x13530
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13065
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x12895
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x12876
1879C	Make it Alternating combinatorics, dp, greedy	1300	x12789
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x12682
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x12644
1475E	Advertising Agency combinatorics, math, sortings	1600	x12187
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12142
1288C	Two Arrays combinatorics, dp	1600	x11817
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11768
1215B	The Number of Products combinatorics, dp, implementation	1400	x11518
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11513
1569C	Jury Meeting combinatorics, math	1500	x11144
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11111
322B	Ciel and Flowers combinatorics, math	1600	x11077
584B	Kolya and Tanya combinatorics	1500	x11055
1178C	Tiles combinatorics, greedy, math	1300	x10817
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x10814
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10581
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10478
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10378
1236B	Alice and the List of Presents combinatorics, math	1500	x10365
1436C	Binary Search binary search, combinatorics	1500	x10278
131C	The World is a Theatre combinatorics, math	1400	x10206
152C	Pocket Book combinatorics	1400	x9925
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x9868
1096B	Substring Removal combinatorics, math, strings	1300	x9772
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x9709
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9506
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9410
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9369
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x8967
978E	Bus Video System combinatorics, math	1400	x8915
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x8857
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x8806
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x8739
1312D	Count the Arrays combinatorics, math	1700	x8614
300C	Beautiful Numbers brute force, combinatorics	1800	x8407
1762C	Binary Strings are Fun combinatorics, math	1400	x8344
1327E	Count The Blocks combinatorics, dp, math	1800	x8286
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8257
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8202
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8145
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8099
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8047
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x7982
1036C	Classy Numbers combinatorics, dp	1900	x7941
1422C	Bargain combinatorics, dp, math	1700	x7882
1795D	Triangle Coloring combinatorics, math	1600	x7794
1452D	Radio Towers combinatorics, dp, math	1600	x7585
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7541
1284C	New Year and Permutation combinatorics, math	1600	x7498
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x7468
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7222
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7212
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x7068
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7004
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x6953
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6894
1081C	Colorful Bricks combinatorics, dp, math	1500	x6764

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