Problemset - Codeforces

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combinatorics

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Problems

#	Name
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9906
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x665
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x815
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2576
1608F	MEX counting combinatorics, dp, implementation	3200	x517
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1347
1606E	Arena combinatorics, dp, math	2100	x3336
1605F	PalindORme combinatorics, dp	2900	x285
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x266
1603E	A Perfect Problem combinatorics, dp, math	3200	x400
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1553
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2237
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8397
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10850
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x157
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1149
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3522
1582B	Luntik and Subsequences combinatorics, math	900	x18792
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13243
1580F	Problems for Codeforces combinatorics, fft, math	3300	x130
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x968
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x585
1574E	Coloring combinatorics, constructive algorithms, implementation, math	2500	x872
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17015
1569C	Jury Meeting combinatorics, math	1500	x11647
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11830
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2214
1558D	Top-Notch Insertions combinatorics, data structures	2600	x923
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8322
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1165
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x195
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3236
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5769
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14957
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1745
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1779
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1735
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x583
1545B	AquaMoon and Chess combinatorics, math	1900	x5631
1543B	Customising the Track combinatorics, greedy, math	900	x22645
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x804
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1182
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2530
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2486
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19585
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x913
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2340
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12485
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x752
1528F	AmShZ Farm combinatorics, fft, math	3300	x273
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x503
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8458
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1828
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1016
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1963
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1528
1517F	Reunion combinatorics, dp, trees	3200	x438
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x811
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3363
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22743
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1410
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13718
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2459
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3834
1503E	2-Coloring combinatorics, dp, math	3100	x592
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1244
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1405
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21010
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1190
1488H	Build From Suffixes *special problem, combinatorics, data structures	2800	x53
1487G	String Counting combinatorics, dp, fft, math	2700	x575
1486F	Pairs of Paths combinatorics, data structures, dfs and similar, dp, trees	2600	x621
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1862
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x123
1475E	Advertising Agency combinatorics, math, sortings	1600	x12861
1475C	Ball in Berland combinatorics, graphs, math	1400	x19938
1473G	Tiles combinatorics, dp, fft, math	2800	x379
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x293
1467D	Sum of Paths combinatorics, dp, math	2200	x3539
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x259
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x848
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9210
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13183
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5504
1452D	Radio Towers combinatorics, dp, math	1600	x7751
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x162
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x373
1444B	Divide and Sum combinatorics, math, sortings	1900	x6037
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4300
1439D	INOI Final Contests combinatorics, dp, fft	3100	x338
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1163
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x493
1436C	Binary Search binary search, combinatorics	1500	x10522
1433E	Two Round Dances combinatorics, math	1300	x18014
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5105
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x803
1422C	Bargain combinatorics, dp, math	1700	x8071
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x7317
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x1723
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x926