Problemset - Codeforces

Problems

#	Name
1530B	Putting Plates constructive algorithms, implementation	800	x15811
1530A	Binary Decimal greedy, math	800	x21136
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20620
1529A	Eshag Loves Big Arrays constructive algorithms, greedy, math	800	x29855
1528F	AmShZ Farm combinatorics, fft, math	3300	x289
1528E	Mashtali and Hagh Trees combinatorics, dp, trees	2900	x534
1528D	It's a bird! No, it's a plane! No, it's AaParsa! constructive algorithms, graphs, shortest paths	2500	x1448
1528C	Trees of Tranquillity data structures, dfs and similar, greedy, trees	2300	x2663
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8768
1528A	Parsa's Humongous Tree dfs and similar, divide and conquer, dp, greedy, trees	1600	x14994
1527E	Partition Game binary search, data structures, divide and conquer, dp	2500	x2364
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1924
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13655
1527B2	Palindrome Game (hard version) constructive algorithms, games	1900	x7990
1527B1	Palindrome Game (easy version) constructive algorithms, games	1200	x26474
1527A	And Then There Were K bitmasks	800	x36040
1526F	Median Queries constructive algorithms, interactive, probabilities	3000	x293
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1067
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2484
1526C2	Potions (Hard Version) data structures, greedy	1600	x23125
1526C1	Potions (Easy Version) brute force, data structures, dp, greedy	1500	x22838
1526B	I Hate 1111 dp, math, number theory	1400	x31072
1526A	Mean Inequality constructive algorithms, sortings	800	x24256
1525F	Goblins And Gnomes brute force, dp, flows, graph matchings	2800	x332
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2081
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x9870
1525C	Robot Collisions data structures, greedy, implementation, sortings	2000	x4504
1525B	Permutation Sort constructive algorithms, greedy	900	x25008
1525A	Potion-making math, number theory	800	x25678
1523H	Hopping Around the Array data structures, dp	3500	x251
1523G	Try Booking data structures, divide and conquer	3200	x466
1523F	Favorite Game bitmasks, dp	3300	x437
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1699
1523D	Love-Hate bitmasks, brute force, dp, probabilities	2400	x2189
1523C	Compression and Expansion brute force, data structures, greedy, implementation, trees	1600	x8809
1523B	Lord of the Values constructive algorithms	1100	x12120
1523A	Game of Life implementation	800	x13520
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x681
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1975
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4384
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21484
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x37578
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x3755
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3042
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11930
1520E	Arranging The Sheep greedy, math	1400	x21753
1520D	Same Differences data structures, hashing, math	1200	x47952
1520C	Not Adjacent Matrix constructive algorithms	1000	x31990
1520B	Ordinary Numbers brute force, math, number theory	800	x44858
1520A	Do Not Be Distracted! brute force, implementation	800	x52261
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x435
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x828
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15429
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x17150
1519B	The Cake Is a Lie dp, math	800	x31076
1519A	Red and Blue Beans math	800	x29040
1517H	Fly Around the World dp, geometry	3500	x73
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x499
1517F	Reunion combinatorics, dp, trees	3200	x466
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x982
1517D	Explorer Space dp, graphs, shortest paths	1800	x7781
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x13421
1517B	Morning Jogging constructive algorithms, greedy, sortings	1200	x13285
1517A	Sum of 2050 greedy, math	800	x25626
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x885
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4436
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x12033
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x19688
1516A	Tit for Tat greedy	800	x23508
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x285
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x240
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1032
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x1836
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3649
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11452
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x17265
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x25124
1515A	Phoenix and Gold constructive algorithms, greedy, math	800	x20262
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x629
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4365
1514C	Product 1 Modulo N greedy, number theory	1600	x15369
1514B	AND 0, Sum Big bitmasks, combinatorics, math	1200	x25460
1514A	Perfectly Imperfect Array math, number theory	800	x24291
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1290
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1526
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5515
1513C	Add One dp, matrices	1600	x14177
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14963
1513A	Array and Peaks constructive algorithms, implementation	800	x19443
1512G	Short Task brute force, dp, math, number theory	1700	x8311
1512F	Education brute force, dp, greedy, implementation	1900	x6283
1512E	Permutation by Sum brute force, greedy, math	1600	x10565
1512D	Corrupted Array constructive algorithms, data structures, greedy	1200	x22734
1512C	A-B Palindrome constructive algorithms, implementation, strings	1200	x20339
1512B	Almost Rectangle implementation	800	x25493
1512A	Spy Detected! brute force, implementation	800	x65273
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x803
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x447
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2614
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11590