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	x38341
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35145
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x30924
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x28921
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28022
1743A	Password brute force, combinatorics, implementation, math	800	x25996
1674B	Dictionary combinatorics, math	800	x25548
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x24994
1840C	Ski Resort combinatorics, math, two pointers	1000	x24372
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23524
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22836
1543B	Customising the Track combinatorics, greedy, math	900	x22624
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22567
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x21968
610A	Pasha and Stick combinatorics, math	1000	x21944
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21537
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21396
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21002
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20758
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20702
630C	Lucky Numbers combinatorics, math	1100	x20337
1475C	Ball in Berland combinatorics, graphs, math	1400	x19890
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19561
1821A	Matching combinatorics, math	800	x19312
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19166
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x18808
1582B	Luntik and Subsequences combinatorics, math	900	x18692
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18339
1433E	Two Round Dances combinatorics, math	1300	x17986
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17356
617B	Chocolate combinatorics	1300	x17263
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x16985
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x16941
1777B	Emordnilap combinatorics, greedy, math	900	x16546
251A	Points on Line binary search, combinatorics, two pointers	1300	x16531
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x15911
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15769
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15561
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15205
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14936
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14765
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14526
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14371
1166A	Silent Classroom combinatorics, greedy	900	x13806
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13679
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13496
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13229
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13154
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13088
1475E	Advertising Agency combinatorics, math, sortings	1600	x12827
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12468
1288C	Two Arrays combinatorics, dp	1600	x12253
1215B	The Number of Products combinatorics, dp, implementation	1400	x12031
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11971
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11812
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11676
1569C	Jury Meeting combinatorics, math	1500	x11623
584B	Kolya and Tanya combinatorics	1500	x11563
322B	Ciel and Flowers combinatorics, math	1600	x11467
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x11420
1178C	Tiles combinatorics, greedy, math	1300	x11268
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11122
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10839
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10771
1236B	Alice and the List of Presents combinatorics, math	1500	x10616
131C	The World is a Theatre combinatorics, math	1400	x10611
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10579
1436C	Binary Search binary search, combinatorics	1500	x10513
1096B	Substring Removal combinatorics, math, strings	1300	x10321
152C	Pocket Book combinatorics	1400	x10238
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10110
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9894
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9769
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9511
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9372
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9363
978E	Bus Video System combinatorics, math	1400	x9196
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9183
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9024
1312D	Count the Arrays combinatorics, math	1700	x8889
300C	Beautiful Numbers brute force, combinatorics	1800	x8837
1762C	Binary Strings are Fun combinatorics, math	1400	x8816
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8675
1907E	Good Triples brute force, combinatorics, number theory	1600	x8664
1036C	Classy Numbers combinatorics, dp	1900	x8501
1327E	Count The Blocks combinatorics, dp, math	1800	x8485
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8438
1795D	Triangle Coloring combinatorics, math	1600	x8399
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8378
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8366
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8306
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8299
1422C	Bargain combinatorics, dp, math	1700	x8064
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8014
1452D	Radio Towers combinatorics, dp, math	1600	x7741
1284C	New Year and Permutation combinatorics, math	1600	x7687
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7659
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7583
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7499
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7426

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