Problemset - Codeforces

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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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Problems

#	Name
1467E	Distinctive Roots in a Tree data structures, dfs and similar, dp, trees	2500	x1452
1467D	Sum of Paths combinatorics, dp, math	2200	x3716
1467C	Three Bags constructive algorithms, greedy	1900	x6440
1467B	Hills And Valleys brute force, implementation	1700	x11014
1466I	The Riddle of the Sphinx binary search, data structures, data structures, interactive	3400	x200
1466H	Finding satisfactory solutions combinatorics, dp, graphs, greedy, math	3300	x308
1466G	Song of the Sirens combinatorics, divide and conquer, hashing, math, string suffix structures, strings	2600	x945
1466F	Euclid's nightmare bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings	2100	x2884
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x7362
1464F	My Beautiful Madness data structures, trees	3500	x328
1463F	Max Correct Set bitmasks, dp, math	3100	x612
1463E	Plan of Lectures constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees	2400	x1548
1463D	Pairs binary search, constructive algorithms, greedy, two pointers	1900	x4475
1463C	Busy Robot implementation	1800	x5684
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x7057
1462E2	Close Tuples (hard version) binary search, combinatorics, implementation, math, sortings, two pointers	1700	x9863
1461F	Mathematical Expression constructive algorithms, dp, greedy	2700	x567
1461E	Water Level brute force, graphs, greedy, implementation, math	2200	x2132
1461D	Divide and Summarize binary search, brute force, data structures, divide and conquer, implementation, sortings	1600	x9306
1458F	Range Diameter Sum data structures, trees	3500	x282
1458E	Nim Shortcuts data structures, games	3100	x498
1458D	Flip and Reverse data structures, graphs, greedy	3100	x1170
1458C	Latin Square math, matrices	2700	x1358
1458B	Glass Half Spilled dp	2000	x3582
1458A	Row GCD math, number theory	1600	x18540
1456E	XOR-ranges dp, greedy	3500	x287
1455G	Forbidden Value data structures, dp	2900	x420
1455F	String and Operations dp, greedy	2800	x451
1455E	Four Points brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search	2400	x1552
1455D	Sequence and Swaps dp, greedy, sortings	1600	x12375
1454F	Array Partition binary search, data structures, greedy, two pointers	2100	x4100
1454E	Number of Simple Paths combinatorics, dfs and similar, graphs, trees	2000	x5873
1453F	Even Harder dp	2700	x849
1453E	Dog Snacks binary search, dfs and similar, dp, greedy, trees	2300	x2066
1453D	Checkpoints brute force, constructive algorithms, greedy, math, probabilities	1900	x4189
1453C	Triangles greedy, implementation	1700	x6061
1452G	Game On Tree data structures, dfs and similar, greedy, trees	2700	x490
1452F	Divide Powers constructive algorithms, greedy	2900	x322
1452E	Two Editorials brute force, dp, greedy, sortings, two pointers	2500	x1569
1452D	Radio Towers combinatorics, dp, math	1600	x8031
1451F	Nullify The Matrix constructive algorithms, games	2700	x994
1451E2	Bitwise Queries (Hard Version) bitmasks, constructive algorithms, interactive, math	2300	x3017
1451E1	Bitwise Queries (Easy Version) bitmasks, constructive algorithms, interactive, math	2000	x4441
1451D	Circle Game games, geometry, math	1700	x9587
1450H2	Multithreading (Hard Version) combinatorics, implementation, math	3300	x220
1450H1	Multithreading (Easy Version) combinatorics, fft, math	2900	x442
1450G	Communism bitmasks, dp, trees	3500	x316
1450F	The Struggling Contestant constructive algorithms, greedy	2400	x1353
1450E	Capitalism constructive algorithms, dfs and similar, graphs, shortest paths	2700	x1157
1450D	Rating Compression binary search, data structures, greedy, implementation, two pointers	1800	x5518
1450C2	Errich-Tac-Toe (Hard Version) constructive algorithms, math	2300	x3740
1450C1	Errich-Tac-Toe (Easy Version) constructive algorithms, math	2100	x5539
1446F	Line Distance binary search, data structures, geometry	3200	x337
1446E	Long Recovery constructive algorithms, dfs and similar	3500	x86
1446D2	Frequency Problem (Hard Version) data structures, greedy, two pointers	3000	x1362
1446D1	Frequency Problem (Easy Version) data structures, greedy	2600	x1787
1446C	Xor Tree binary search, bitmasks, data structures, divide and conquer, dp, trees	2100	x3668
1446B	Catching Cheaters dp, strings	1800	x7922
1444E	Finding the Vertex brute force, dfs and similar, dp, interactive, trees	3500	x138
1444D	Rectangular Polyline constructive algorithms, dp, geometry	2900	x574
1444C	Team-Building data structures, dfs and similar, dsu, graphs	2500	x1620
1444B	Divide and Sum combinatorics, math, sortings	1900	x6349
1443E	Long Permutation brute force, math, two pointers	2400	x1270
1442F	Differentiating Games games, interactive	3400	x140
1442E	Black, White and Grey Tree binary search, constructive algorithms, dfs and similar, dp, greedy, trees	3000	x610
1442D	Sum data structures, divide and conquer, dp, greedy	2800	x2303
1442C	Graph Transpositions dfs and similar, graphs, greedy, shortest paths	2400	x1713
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x4512
1442A	Extreme Subtraction constructive algorithms, dp, greedy	1800	x8928
1439E	Cheat and Win bitmasks, data structures, games, trees	3500	x222
1439D	INOI Final Contests combinatorics, dp, fft	3100	x388
1439C	Greedy Shopping binary search, data structures, divide and conquer, greedy, implementation	2600	x1934
1439B	Graph Subset Problem constructive algorithms, data structures, graphs	2600	x1477
1439A2	Binary Table (Hard Version) constructive algorithms, graphs, greedy, implementation	1900	x5142
1438F	Olha and Igor interactive, probabilities, trees	3000	x645
1438E	Yurii Can Do Everything binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers	2500	x1357
1438D	Powerful Ksenia bitmasks, constructive algorithms, math	2200	x4223
1438C	Engineer Artem 2-sat, chinese remainder theorem, constructive algorithms, fft, flows	2000	x10608
1437G	Death DBMS data structures, string suffix structures, strings, trees	2600	x1014
1437F	Emotional Fishermen combinatorics, dp, math, two pointers	2600	x1322
1437E	Make It Increasing binary search, constructive algorithms, data structures, dp, implementation	2200	x3482
1437D	Minimal Height Tree graphs, greedy, shortest paths, trees	1600	x12917
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x10616
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x529
1436E	Complicated Computations binary search, data structures, two pointers	2400	x2302
1436D	Bandit in a City binary search, dfs and similar, graphs, greedy, trees	1900	x6105
1434E	A Convex Game dsu, games	3500	x176
1433G	Reducing Delivery Cost brute force, graphs, shortest paths	2100	x4405
1433F	Zero Remainder Sum dp	2100	x6146
1431J	Zero-XOR Array *special problem, dp	3400	x44
1431I	Cyclic Shifts *special problem, strings	2900	x46
1431H	Rogue-like Game *special problem, brute force, greedy, two pointers	2600	x67
1431G	Number Deletion Game *special problem, dp, games, greedy	2100	x189
1431F	Neural Network Problem *special problem, binary search, greedy	2100	x156
1431E	Chess Match *special problem	2000	x224
1431C	Black Friday *special problem, implementation	1600	x707
1430G	Yet Another DAG Problem bitmasks, dfs and similar, dp, flows, graphs, math	2600	x724
1430F	Realistic Gameplay dp, greedy	2600	x929
1430E	String Reversal data structures, greedy, strings	1900	x6570
1430D	String Deletion binary search, data structures, greedy, two pointers	1700	x8846