Problemset - Codeforces

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Before contest
Codeforces Round 941 (Div. 1)
4 days

Before contest
Codeforces Round 941 (Div. 2)
4 days

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Difficulty: —

combinatorics

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Problems

#	Name
1102E	Monotonic Renumeration combinatorics, sortings	1700	x5582
1279D	Santa's Bot combinatorics, math, probabilities	1700	x5878
630I	Parking Lot combinatorics, math	1700	x6260
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6348
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x6498
489D	Unbearable Controversy of Being brute force, combinatorics, dfs and similar, graphs	1700	x6528
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6579
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6607
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1700	x6663
1931F	Chat Screenshots combinatorics, dfs and similar, graphs	1700	x6812
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6983
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7075
1422C	Bargain combinatorics, dp, math	1700	x8064
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8298
1715C	Monoblock combinatorics, data structures, implementation, math	1700	x8305
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8376
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8438
1312D	Count the Arrays combinatorics, math	1700	x8889
1301C	Ayoub's function binary search, combinatorics, greedy, math, strings	1700	x9016
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9182
1699C	The Third Problem combinatorics, constructive algorithms, math	1700	x9363
323A	Black-and-White Cube combinatorics, constructive algorithms	1600	x715
52B	Right Triangles combinatorics	1600	x1978
272D	Dima and Two Sequences combinatorics, math, sortings	1600	x2581
630G	Challenge Pennants combinatorics, math	1600	x2616
319A	Malek Dance Club combinatorics, math	1600	x2752
107B	Basketball Team combinatorics, dp, math, probabilities	1600	x3276
150B	Quantity of Strings combinatorics, dfs and similar, graphs, math	1600	x3944
340C	Tourist Problem combinatorics, implementation, math	1600	x4098
364A	Matrix combinatorics, data structures, implementation	1600	x4590
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7330
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7581
1284C	New Year and Permutation combinatorics, math	1600	x7687
1452D	Radio Towers combinatorics, dp, math	1600	x7740
1795D	Triangle Coloring combinatorics, math	1600	x8395
1907E	Good Triples brute force, combinatorics, number theory	1600	x8659
322B	Ciel and Flowers combinatorics, math	1600	x11467
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11811
1288C	Two Arrays combinatorics, dp	1600	x12252
1475E	Advertising Agency combinatorics, math, sortings	1600	x12827
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13493
288B	Polo the Penguin and Houses combinatorics	1500	x2844
374B	Inna and Nine combinatorics, greedy	1500	x3229
204A	Little Elephant and Interval binary search, combinatorics, dp	1500	x5517
817B	Makes And The Product combinatorics, implementation, math, sortings	1500	x5534
677C	Vanya and Label bitmasks, combinatorics, implementation, strings	1500	x6267
608B	Hamming Distance Sum combinatorics, strings	1500	x6466
1081C	Colorful Bricks combinatorics, dp, math	1500	x6975
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7423
1084C	The Fair Nut and String combinatorics, dp, implementation	1500	x7499
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7659
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x8014
553A	Kyoya and Colored Balls combinatorics, dp, math	1500	x8366
1739C	Card Game combinatorics, constructive algorithms, dp, games	1500	x8673
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9371
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9894
1105C	Ayoub and Lost Array combinatorics, dp, math	1500	x10109
1436C	Binary Search binary search, combinatorics	1500	x10512
1236B	Alice and the List of Presents combinatorics, math	1500	x10616
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x11120
584B	Kolya and Tanya combinatorics	1500	x11562
1569C	Jury Meeting combinatorics, math	1500	x11622
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13154
1391C	Cyclic Permutations combinatorics, dp, graphs, math	1500	x14526
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14934
124B	Permutations brute force, combinatorics, implementation	1400	x3739
630H	Benches combinatorics, math	1400	x4732
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7155
1762C	Binary Strings are Fun combinatorics, math	1400	x8815
978E	Bus Video System combinatorics, math	1400	x9194
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9511
152C	Pocket Book combinatorics	1400	x10238
1284B	New Year and Ascent Sequence binary search, combinatorics, data structures, dp, implementation, sortings	1400	x10578
131C	The World is a Theatre combinatorics, math	1400	x10610
1648A	Weird Sum combinatorics, data structures, geometry, math, matrices, sortings	1400	x11675
1215B	The Number of Products combinatorics, dp, implementation	1400	x12029
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13671
1475C	Ball in Berland combinatorics, graphs, math	1400	x19886
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20698
171B	Star *special problem, combinatorics	1300	x3933
630F	Selection of Personnel combinatorics, math	1300	x6542
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6953
844B	Rectangles combinatorics, math	1300	x6972
1096B	Substring Removal combinatorics, math, strings	1300	x10321
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10770
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10838
1178C	Tiles combinatorics, greedy, math	1300	x11266
1007A	Reorder the Array combinatorics, data structures, math, sortings, two pointers	1300	x11971
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12468
1879C	Make it Alternating combinatorics, dp, greedy	1300	x14760
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15204
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15554
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x15909
251A	Points on Line binary search, combinatorics, two pointers	1300	x16530
617B	Chocolate combinatorics	1300	x17263
1433E	Two Round Dances combinatorics, math	1300	x17986
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x28022
476B	Dreamoon and WiFi bitmasks, brute force, combinatorics, dp, math, probabilities	1300	x28920
478B	Random Teams combinatorics, constructive algorithms, greedy, math	1300	x35143
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x38337