Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8873
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12779
1553D	Backspace dp, greedy, strings, two pointers	1500	x13735
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x14147
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7014
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5909
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15421
1551D1	Domino (easy version) constructive algorithms, math	1700	x7073
1551C	Interesting Story greedy, sortings, strings	1500	x13304
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15507
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10189
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9824
1548A	Web of Lies brute force, graphs, greedy	1400	x16427
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5825
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14449
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16694
1545B	AquaMoon and Chess combinatorics, math	1900	x5938
1545A	AquaMoon and Strange Sort sortings	1500	x13898
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7603
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5291
1542C	Strange Function math, number theory	1600	x14215
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x23117
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x13940
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x11639
1538F	Interesting Function binary search, dp, math, number theory	1500	x19255
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13608
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x28515
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x12947
1537D	Deleting Divisors games, math, number theory	1700	x12387
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x14132
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x7731
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x16490
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6034
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12807
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9207
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8698
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x14717
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13547
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x7920
1526C2	Potions (Hard Version) data structures, greedy	1600	x22652
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x22435
1526B	I Hate 1111 dp, math, number theory	1400	x30580
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9771
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8771
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21350
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11746
1520E	Arranging The Sheep greedy, math	1400	x21411
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15250
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x16942
1517D	Explorer Space dp, graphs, shortest paths	1800	x7711
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x13364
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11947
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x19374
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11406
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x17115
1514C	Product 1 Modulo N greedy, number theory	1600	x15133
1513C	Add One dp, matrices	1600	x14010
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14716
1512G	Short Task brute force, dp, math, number theory	1700	x8143
1512F	Education brute force, dp, greedy, implementation	1900	x6230
1512E	Permutation by Sum brute force, greedy, math	1600	x10474
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11497
1509C	The Sports Festival dp, greedy	1800	x12555
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3996
1508A	Binary Literature constructive algorithms, greedy, implementation, strings, two pointers	1900	x6227
1506E	Restoring the Permutation constructive algorithms, implementation	1500	x13096
1506D	Epic Transformation constructive algorithms, data structures, greedy	1400	x21757
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1802
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x796
1505C	Fibonacci Words *special problem, implementation	1400	x6436
1505B	DMCA *special problem, implementation, number theory	1600	x6162
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7040
1503A	Balance the Bits constructive algorithms, greedy	1600	x13405
1500A	Going Home brute force, hashing, implementation, math	1800	x8823
1499C	Minimum Grid Path brute force, data structures, greedy, math	1500	x12647
1498C	Planar Reflections brute force, data structures, dp	1600	x9705
1498B	Box Fitting binary search, bitmasks, data structures, greedy	1300	x17195
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8322
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17272
1495B	Let's Go Hiking games, greedy	1900	x6006
1494C	1D Sokoban binary search, dp, greedy, implementation, two pointers	1900	x5432
1494B	Berland Crossword bitmasks, brute force, greedy, implementation	1400	x14370
1493B	Planet Lapituletti brute force, implementation	1300	x11845
1492D	Genius's Gambit bitmasks, constructive algorithms, greedy, math	1900	x6093
1492C	Maximum width binary search, data structures, dp, greedy, two pointers	1500	x16094
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x7176
1491C	Pekora and Trampoline brute force, data structures, dp, greedy, implementation	1700	x7918
1490G	Old Floppy Drive binary search, data structures, math	1900	x5647
1490F	Equalize the Array binary search, data structures, greedy, math, sortings	1500	x16161
1490E	Accidental Victory binary search, data structures, greedy	1400	x19082
1488D	Problemsolving Marathon *special problem, binary search, greedy	1900	x337
1488C	Two Policemen *special problem, binary search, brute force, math	1900	x405
1488B	RBS Deletion *special problem, greedy	1800	x558
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x17917
1487C	Minimum Ties brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math	1500	x14152
1486C2	Guessing the Greatest (hard version) binary search, interactive	1900	x8472
1486C1	Guessing the Greatest (easy version) binary search, interactive	1600	x12204
1486B	Eastern Exhibition binary search, geometry, shortest paths, sortings	1500	x15971
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9950
1482D	Playlist data structures, dsu, implementation, shortest paths	1900	x3853