Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38289
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35094
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x30870
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x28897
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28006
1743A	Password brute force, combinatorics, implementation, math	800	x25964
1674B	Dictionary combinatorics, math	800	x25528
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x24951
1840C	Ski Resort combinatorics, math, two pointers	1000	x24279
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23450
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22813
1543B	Customising the Track combinatorics, greedy, math	900	x22606
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22473
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x21946
610A	Pasha and Stick combinatorics, math	1000	x21916
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21509
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21378
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x20994
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20746
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20650
630C	Lucky Numbers combinatorics, math	1100	x20312
1475C	Ball in Berland combinatorics, graphs, math	1400	x19859
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19552
1821A	Matching combinatorics, math	800	x19295
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19098
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18766
1582B	Luntik and Subsequences combinatorics, math	900	x18648
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18329
1433E	Two Round Dances combinatorics, math	1300	x17969
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17302
617B	Chocolate combinatorics	1300	x17246
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x16973
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x16917
1777B	Emordnilap combinatorics, greedy, math	900	x16537
251A	Points on Line binary search, combinatorics, two pointers	1300	x16508
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x15876
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15762
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15463
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15200
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14924
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14710
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14516
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14362
1166A	Silent Classroom combinatorics, greedy	900	x13800
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13646
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13470
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13223
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13151
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13079
1475E	Advertising Agency combinatorics, math, sortings	1600	x12808
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12460
1288C	Two Arrays combinatorics, dp	1600	x12241
1215B	The Number of Products combinatorics, dp, implementation	1400	x12003
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11967
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11795
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11649
1569C	Jury Meeting combinatorics, math	1500	x11618
584B	Kolya and Tanya combinatorics	1500	x11557
322B	Ciel and Flowers combinatorics, math	1600	x11452
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x11400
1178C	Tiles combinatorics, greedy, math	1300	x11198
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11092
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10826
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10768
1236B	Alice and the List of Presents combinatorics, math	1500	x10613
131C	The World is a Theatre combinatorics, math	1400	x10599
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10573
1436C	Binary Search binary search, combinatorics	1500	x10503
1096B	Substring Removal combinatorics, math, strings	1300	x10299
152C	Pocket Book combinatorics	1400	x10232
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10102
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9888
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9764
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9509
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9359
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9343
978E	Bus Video System combinatorics, math	1400	x9188
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9176
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x8995
1312D	Count the Arrays combinatorics, math	1700	x8880
300C	Beautiful Numbers brute force, combinatorics	1800	x8823
1762C	Binary Strings are Fun combinatorics, math	1400	x8808
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8664
1907E	Good Triples brute force, combinatorics, number theory	1600	x8621
1036C	Classy Numbers combinatorics, dp	1900	x8484
1327E	Count The Blocks combinatorics, dp, math	1800	x8483
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8433
1795D	Triangle Coloring combinatorics, math	1600	x8382
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8370
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8361
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8298
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8293
1422C	Bargain combinatorics, dp, math	1700	x8060
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x7999
1452D	Radio Towers combinatorics, dp, math	1600	x7739
1284C	New Year and Permutation combinatorics, math	1600	x7684
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7657
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7566
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7483
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7391

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