Problemset - Codeforces

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Ethflow Round 1 (Codeforces Round, Div. 1 + Div. 2)
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Problems

#	Name
1468N	Waste Sorting greedy, implementation	900	x8342
1468M	Similar Sets data structures, graphs, implementation	2300	x970
1468L	Prime Divisors Selection binary search, greedy, math, number theory	2700	x329
1468K	The Robot brute force, implementation	1600	x5224
1468J	Road Reform dsu, graphs, greedy	1800	x4493
1468I	Plane Tiling geometry, implementation, math	2500	x519
1468H	K and Medians constructive algorithms, greedy, math	2200	x1840
1468G	Hobbits binary search, geometry	2500	x829
1468F	Full Turn geometry, hashing, number theory	1700	x3825
1468E	Four Segments greedy	800	x9025
1468D	Firecrackers binary search, sortings	1700	x4813
1468C	Berpizza data structures, implementation	1400	x8268
1468B	Bakery data structures, dsu	2900	x224
1468A	LaIS data structures, dp, greedy	2200	x1716
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1464
1467D	Sum of Paths combinatorics, dp, math	2200	x3744
1467C	Three Bags constructive algorithms, greedy	1900	x6482
1467B	Hills And Valleys brute force, implementation	1700	x11104
1467A	Wizard of Orz constructive algorithms, greedy, math	900	x24572
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x202
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x332
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x949
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2911
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7445
1466D	13th Labour of Heracles data structures, greedy, sortings, trees	1500	x11725
1466C	Canine poetry dp, greedy, strings	1300	x17844
1466B	Last minute enhancements dp, greedy	800	x22866
1466A	Bovine Dilemma brute force, geometry, math	800	x22679
1464F	My Beautiful Madness data structures, trees	3500	x331
1463F	Max Correct Set bitmasks, dp, math	3100	x621
1463E	Plan of Lectures constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees	2400	x1561
1463D	Pairs binary search, constructive algorithms, greedy, two pointers	1900	x4517
1463C	Busy Robot implementation	1800	x5718
1463B	Find The Array bitmasks, constructive algorithms, greedy	1400	x19758
1463A	Dungeon binary search, math	1100	x25997
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x7121
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x10000
1462E1	Close Tuples (easy version) binary search, combinatorics, math, sortings, two pointers	1500	x14080
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x17004
1462C	Unique Number brute force, greedy, math	900	x33370
1462B	Last Year's Substring dp, implementation, strings	800	x27692
1462A	Favorite Sequence implementation, two pointers	800	x42946
1461F	Mathematical Expression constructive algorithms, dp, greedy	2700	x573
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2140
1461D	Divide and Summarize binary search, brute force, data structures, divide and conquer, implementation, sortings	1600	x9387
1461C	Random Events dp, math, probabilities	1500	x11434
1461B	Find the Spruce brute force, dp, implementation	1400	x12769
1461A	String Generation constructive algorithms, greedy	800	x18640
1459B	Move and Turn dp, math	1300	x15438
1459A	Red-Blue Shuffle math, probabilities	800	x17096
1458F	Range Diameter Sum data structures, trees	3500	x294
1458E	Nim Shortcuts data structures, games	3100	x503
1458D	Flip and Reverse data structures, graphs, greedy	3100	x1196
1458C	Latin Square math, matrices	2700	x1392
1458B	Glass Half Spilled dp	2000	x3613
1458A	Row GCD math, number theory	1600	x19272
1456E	XOR-ranges dp, greedy	3500	x292
1455G	Forbidden Value data structures, dp	2900	x428
1455F	String and Operations dp, greedy	2800	x457
1455E	Four Points brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search	2400	x1556
1455D	Sequence and Swaps dp, greedy, sortings	1600	x12466
1455C	Ping-pong constructive algorithms, games, math	1100	x19758
1455B	Jumps constructive algorithms, math	1200	x22196
1455A	Strange Functions math, number theory	800	x26653
1454F	Array Partition binary search, data structures, greedy, two pointers	2100	x4154
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5927
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x20793
1454C	Sequence Transformation greedy, implementation	1200	x21674
1454B	Unique Bid Auction implementation	800	x28798
1454A	Special Permutation constructive algorithms, probabilities	800	x41223
1453F	Even Harder dp	2700	x862
1453E	Dog Snacks binary search, dfs and similar, dp, greedy, trees	2300	x2078
1453D	Checkpoints brute force, constructive algorithms, greedy, math, probabilities	1900	x4208
1453C	Triangles greedy, implementation	1700	x6074
1453B	Suffix Operations constructive algorithms, implementation	1400	x13486
1453A	Cancel the Trains implementation	800	x22779
1452G	Game On Tree data structures, dfs and similar, greedy, trees	2700	x494
1452F	Divide Powers constructive algorithms, greedy	2900	x324
1452E	Two Editorials brute force, dp, greedy, sortings, two pointers	2500	x1577
1452D	Radio Towers combinatorics, dp, math	1600	x8099
1452C	Two Brackets greedy	800	x19846
1452B	Toy Blocks binary search, greedy, math, sortings	1400	x14894
1452A	Robot Program math	800	x22241
1451F	Nullify The Matrix constructive algorithms, games	2700	x1005
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x3051
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4490
1451D	Circle Game games, geometry, math	1700	x9659
1451C	String Equality dp, greedy, hashing, implementation, strings	1400	x15941
1451B	Non-Substring Subsequence dp, greedy, implementation, strings	900	x19447
1451A	Subtract or Divide greedy, math	800	x24419
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x234
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x451
1450G	Communism bitmasks, dp, trees	3500	x319
1450F	The Struggling Contestant constructive algorithms, greedy	2400	x1357
1450E	Capitalism constructive algorithms, dfs and similar, graphs, shortest paths	2700	x1171
1450D	Rating Compression binary search, data structures, greedy, implementation, two pointers	1800	x5556
1450C2	Errich-Tac-Toe (Hard Version) constructive algorithms, math	2300	x3766
1450C1	Errich-Tac-Toe (Easy Version) constructive algorithms, math	2100	x5577
1450B	Balls of Steel brute force, geometry, greedy	1000	x15282
1450A	Avoid Trygub constructive algorithms, sortings	800	x18072