Problemset - Codeforces

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Codeforces Round #851 (Div. 2)
37:47:26
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combinatorics

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Problems

#	Name
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x32123
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x30032
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x24943
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x24329
1743A	Password brute force, combinatorics, implementation, math	800	x22543
1674B	Dictionary combinatorics, math	800	x22487
1272C	Yet Another Broken Keyboard combinatorics, dp, implementation	1200	x21059
1543B	Customising the Track combinatorics, greedy, math	900	x20802
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x20200
1674C	Infinite Replacement combinatorics, implementation, strings	1000	x19533
1293B	JOE is on TV! combinatorics, greedy, math	1000	x19058
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x18491
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x18249
610A	Pasha and Stick combinatorics, math	1000	x18235
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x18008
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x17430
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x17325
1475C	Ball in Berland combinatorics, graphs, math	1400	x17302
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x17234
630C	Lucky Numbers combinatorics, math	1100	x16547
1433E	Two Round Dances combinatorics, math	1300	x16301
1582B	Luntik and Subsequences combinatorics, math	900	x16074
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x15655
617B	Chocolate combinatorics	1300	x14751
1326C	Permutation Partitions combinatorics, greedy, math	1300	x14287
251A	Points on Line binary search, combinatorics, two pointers	1300	x13979
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x13489
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x13242
1166A	Silent Classroom combinatorics, greedy	900	x13070
1777B	Emordnilap combinatorics, greedy, math		x12876
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x12281
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x11857
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x11851
629A	Far Relative’s Birthday Cake brute force, combinatorics, constructive algorithms, implementation	800	x11663
1732A	Bestie brute force, combinatorics, constructive algorithms, implementation, math, number theory	1000	x11610
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x11517
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11220
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x11207
1475E	Advertising Agency combinatorics, math, sortings	1600	x11034
1288C	Two Arrays combinatorics, dp	1600	x10770
1215B	The Number of Products combinatorics, dp, implementation	1400	x10753
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x10677
322B	Ciel and Flowers combinatorics, math	1600	x10312
1178C	Tiles combinatorics, greedy, math	1300	x10112
584B	Kolya and Tanya combinatorics	1500	x10049
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10046
1569C	Jury Meeting combinatorics, math	1500	x10039
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x9967
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x9823
1236B	Alice and the List of Presents combinatorics, math	1500	x9803
621B	Wet Shark and Bishops combinatorics, implementation	1300	x9766
1436C	Binary Search binary search, combinatorics	1500	x9677
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x9529
152C	Pocket Book combinatorics	1400	x9399
1096B	Substring Removal combinatorics, math, strings	1300	x9370
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x9315
131C	The World is a Theatre combinatorics, math	1400	x9220
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x8874
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x8662
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x8561
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x8479
978E	Bus Video System combinatorics, math	1400	x8155
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x8075
1312D	Count the Arrays combinatorics, math	1700	x8010
1327E	Count The Blocks combinatorics, dp, math	1800	x7789
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x7717
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x7685
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x7651
300C	Beautiful Numbers brute force, combinatorics	1800	x7488
1422C	Bargain combinatorics, dp, math	1700	x7415
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x7397
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x7324
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7322
1284C	New Year and Permutation combinatorics, math	1600	x7214
1452D	Radio Towers combinatorics, dp, math	1600	x7189
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x7151
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x7135
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x7111
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x6929
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x6873
1762C	Binary Strings are Fun combinatorics, math	1400	x6807
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6772
1036C	Classy Numbers combinatorics, dp	1900	x6659
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x6625
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x6483
1081C	Colorful Bricks combinatorics, dp, math	1500	x6193
489D	Unbearable Controversy of Being brute force, combinatorics, dfs and similar, graphs	1700	x6172
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6076
844B	Rectangles combinatorics, math	1300	x6047
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6033
888D	Almost Identity Permutations combinatorics, dp, math	1600	x5951
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x5912
608B	Hamming Distance Sum combinatorics, strings	1500	x5911
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1700	x5810
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x5755
630F	Selection of Personnel combinatorics, math	1300	x5731
1444B	Divide and Sum combinatorics, math, sortings	1900	x5468
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5358
1238D	AB-string binary search, combinatorics, dp, strings	1900	x5271
1207D	Number Of Permutations combinatorics	1800	x5246

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