Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
2 days
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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38523
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35315
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x31142
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x29091
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28167
1743A	Password brute force, combinatorics, implementation, math	800	x26147
1674B	Dictionary combinatorics, math	800	x25643
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x25167
1840C	Ski Resort combinatorics, math, two pointers	1000	x24692
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23863
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x22940
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22862
1543B	Customising the Track combinatorics, greedy, math	900	x22676
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22069
610A	Pasha and Stick combinatorics, math	1000	x22051
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x21662
1840B	Binary Cafe bitmasks, combinatorics, math	1100	x21532
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21019
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20891
1293B	JOE is on TV! combinatorics, greedy, math	1000	x20806
630C	Lucky Numbers combinatorics, math	1100	x20435
1475C	Ball in Berland combinatorics, graphs, math	1400	x20000
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19613
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19462
1821A	Matching combinatorics, math	800	x19377
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19052
1582B	Luntik and Subsequences combinatorics, math	900	x18887
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18373
1433E	Two Round Dances combinatorics, math	1300	x18045
1827A	Counting Orders combinatorics, math, sortings, two pointers	1100	x17519
617B	Chocolate combinatorics	1300	x17341
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x17061
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17042
251A	Points on Line binary search, combinatorics, two pointers	1300	x16761
1777B	Emordnilap combinatorics, greedy, math	900	x16597
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x16065
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15893
1823A	A-characteristic combinatorics, constructive algorithms, math	800	x15818
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15286
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14984
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14970
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14558
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x14435
1166A	Silent Classroom combinatorics, greedy	900	x13971
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13787
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13627
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13260
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13212
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x13127
1475E	Advertising Agency combinatorics, math, sortings	1600	x12904
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12507
1288C	Two Arrays combinatorics, dp	1600	x12304
1215B	The Number of Products combinatorics, dp, implementation	1400	x12095
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11989
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11854
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11789
1569C	Jury Meeting combinatorics, math	1500	x11665
584B	Kolya and Tanya combinatorics	1500	x11598
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x11504
322B	Ciel and Flowers combinatorics, math	1600	x11503
1178C	Tiles combinatorics, greedy, math	1300	x11423
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11255
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10872
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10792
1236B	Alice and the List of Presents combinatorics, math	1500	x10670
131C	The World is a Theatre combinatorics, math	1400	x10652
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10591
1436C	Binary Search binary search, combinatorics	1500	x10535
1096B	Substring Removal combinatorics, math, strings	1300	x10342
152C	Pocket Book combinatorics	1400	x10264
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10147
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9921
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x9814
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9522
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9438
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9421
978E	Bus Video System combinatorics, math	1400	x9240
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9222
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9058
1312D	Count the Arrays combinatorics, math	1700	x8960
300C	Beautiful Numbers brute force, combinatorics	1800	x8881
1762C	Binary Strings are Fun combinatorics, math	1400	x8869
1907E	Good Triples brute force, combinatorics, number theory	1600	x8832
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8719
1036C	Classy Numbers combinatorics, dp	1900	x8619
1327E	Count The Blocks combinatorics, dp, math	1800	x8572
1795D	Triangle Coloring combinatorics, math	1600	x8490
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8473
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8411
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8383
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8348
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8336
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8100
1422C	Bargain combinatorics, dp, math	1700	x8080
1452D	Radio Towers combinatorics, dp, math	1600	x7772
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7770
1284C	New Year and Permutation combinatorics, math	1600	x7714
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7632
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x7605
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7551

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