Problemset - Codeforces

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Codeforces Round 945 (Div. 2)
38:22:56
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combinatorics

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Problems

#	Name
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x748
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x9922
1613F	Tree Coloring combinatorics, divide and conquer, fft	2600	x667
1612G	Max Sum Array combinatorics, constructive algorithms, greedy, sortings	2500	x816
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2582
1608F	MEX counting combinatorics, dp, implementation	3200	x520
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1349
1606E	Arena combinatorics, dp, math	2100	x3342
1605F	PalindORme combinatorics, dp	2900	x291
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x268
1603E	A Perfect Problem combinatorics, dp, math	3200	x402
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1558
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2242
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8411
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x10874
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x158
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1149
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3524
1582B	Luntik and Subsequences combinatorics, math	900	x18892
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13261
1580F	Problems for Codeforces combinatorics, fft, math	3300	x130
1580B	Mathematics Curriculum brute force, combinatorics, dp, trees	2600	x971
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x586
1574E	Coloring combinatorics, constructive algorithms, implementation, math	2500	x873
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17044
1569C	Jury Meeting combinatorics, math	1500	x11665
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x11854
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2217
1558D	Top-Notch Insertions combinatorics, data structures	2600	x924
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8338
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1177
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	x3241
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5775
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x14987
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1751
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1783
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1737
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x585
1545B	AquaMoon and Chess combinatorics, math	1900	x5644
1543B	Customising the Track combinatorics, greedy, math	900	x22676
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x808
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1186
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2533
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2490
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19614
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	x2344
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12509
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x752
1528F	AmShZ Farm combinatorics, fft, math	3300	x275
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x504
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8474
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1836
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1020
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x1968
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1533
1517F	Reunion combinatorics, dp, trees	3200	x441
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x811
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3372
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x22868
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1412
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x13788
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2463
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3844
1503E	2-Coloring combinatorics, dp, math	3100	x592
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1250
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1407
1499A	Domino on Windowsill combinatorics, constructive algorithms, math	800	x21023
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1191
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	x622
1485F	Copy or Prefix Sum combinatorics, data structures, dp, sortings	2400	x1865
1477F	Nezzar and Chocolate Bars combinatorics, fft, math, probabilities	3500	x123
1475E	Advertising Agency combinatorics, math, sortings	1600	x12908
1475C	Ball in Berland combinatorics, graphs, math	1400	x20002
1473G	Tiles combinatorics, dp, fft, math	2800	x382
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x293
1467D	Sum of Paths combinatorics, dp, math	2200	x3542
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x261
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x849
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9223
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x13213
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5518
1452D	Radio Towers combinatorics, dp, math	1600	x7772
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x165
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x375
1444B	Divide and Sum combinatorics, math, sortings	1900	x6049
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4312
1439D	INOI Final Contests combinatorics, dp, fft	3100	x340
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1166
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x500
1436C	Binary Search binary search, combinatorics	1500	x10535
1433E	Two Round Dances combinatorics, math	1300	x18047
1426F	Number of Subsequences combinatorics, dp, strings	2000	x5120
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x804
1422C	Bargain combinatorics, dp, math	1700	x8081
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x7341
1418E	Expected Damage binary search, combinatorics, probabilities	2400	x1726