Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days

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Problems

#	Name
1713D	Tournament Countdown constructive algorithms, greedy, interactive, number theory, probabilities	1800	x3409
1709C	Recover an RBS constructive algorithms, greedy, implementation, strings	1800	x6176
1705D	Mark and Lightbulbs combinatorics, constructive algorithms, greedy, math, sortings	1800	x4359
1691D	Max GEQ Sum binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers	1800	x3699
1678B2	Tokitsukaze and Good 01-String (hard version) dp, greedy, implementation	1800	x4959
1675F	Vlad and Unfinished Business dfs and similar, dp, greedy, trees	1800	x3301
1674F	Desktop Rearrangement data structures, greedy, implementation	1800	x3632
1666L	Labyrinth dfs and similar, graphs	1800	x2060
1666C	Connect the Points brute force, constructive algorithms, geometry	1800	x2179
1648B	Integral Array brute force, constructive algorithms, data structures, math	1800	x4783
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x5827
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x4600
1630B	Range and Partition binary search, constructive algorithms, data structures, greedy, two pointers	1800	x4393
1620C	BA-String brute force, dp, greedy, implementation, math	1800	x5123
1619D	New Year's Problem binary search, greedy, sortings	1800	x5456
1617D1	Too Many Impostors (easy version) constructive algorithms, implementation, interactive	1800	x3726
1611F	ATM and Students binary search, data structures, two pointers	1800	x4521
1583D	Omkar and the Meaning of Life constructive algorithms, greedy, interactive	1800	x4482
1582F1	Korney Korneevich and XOR (easy version) bitmasks, dp, greedy	1800	x3712
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x1694
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x6542
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x246
1571C	Rhyme *special problem, implementation	1800	x296
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x6370
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x5045
1556C	Compressed Bracket Sequence brute force, implementation	1800	x4958
1554D	Diane constructive algorithms, greedy, strings	1800	x7271
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x6951
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x5470
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5156
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x7305
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x6193
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x4755
1525D	Armchairs dp, flows, graph matchings, greedy	1800	x7409
1517D	Explorer Space dp, graphs, shortest paths	1800	x6102
1509C	The Sports Festival dp, greedy	1800	x9165
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3229
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1539
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x583
1500A	Going Home brute force, hashing, implementation, math	1800	x7373
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x5827
1488B	RBS Deletion *special problem, greedy	1800	x468
1477A	Nezzar and Board constructive algorithms, math, number theory	1800	x4948
1475D	Cleaning the Phone binary search, dp, sortings, two pointers	1800	x7844
1468J	Road Reform dsu, graphs, greedy	1800	x2814
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x5963
1463C	Busy Robot implementation	1800	x4785
1462F	The Treasure of The Segments binary search, data structures, greedy	1800	x5411
1450D	Rating Compression binary search, data structures, greedy, implementation, two pointers	1800	x4627
1446B	Catching Cheaters dp, strings	1800	x6394
1442B	Identify the Operations combinatorics, data structures, dsu, greedy, implementation	1800	x3736
1442A	Extreme Subtraction constructive algorithms, dp, greedy	1800	x7208
1437C	Chef Monocarp dp, flows, graph matchings, greedy, math, sortings	1800	x8412
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x6200
1420D	Rescue Nibel! combinatorics, data structures, sortings	1800	x6118
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x6472
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x945
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x7501
1398D	Colored Rectangles dp, greedy, sortings	1800	x9436
1396B	Stoned Game brute force, constructive algorithms, games, greedy	1800	x9107
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x5761
1388C	Uncle Bogdan and Country Happiness dfs and similar, greedy, math, trees	1800	x8266
1381B	Unmerge dp	1800	x7364
1367D	Task On The Board constructive algorithms, greedy, implementation, sortings	1800	x7235
1355C	Count Triangles binary search, implementation, math, two pointers	1800	x8978
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x7085
1335E2	Three Blocks Palindrome (hard version) brute force, data structures, dp, two pointers	1800	x6934
1334D	Minimum Euler Cycle constructive algorithms, graphs, greedy, implementation	1800	x6312
1329A	Dreamoon Likes Coloring constructive algorithms, greedy, implementation, math	1800	x7924
1328D	Carousel constructive algorithms, dp, graphs, greedy, math	1800	x10572
1327E	Count The Blocks combinatorics, dp, math	1800	x7490
1326D2	Prefix-Suffix Palindrome (Hard version) binary search, greedy, hashing, string suffix structures, strings	1800	x7917
1324F	Maximum White Subtree dfs and similar, dp, graphs, trees	1800	x6459
1316C	Primitive Primes constructive algorithms, math, ternary search	1800	x6425
1304D	Shortest and Longest LIS constructive algorithms, graphs, greedy, two pointers	1800	x5359
1299B	Aerodynamic geometry	1800	x4639
1296E1	String Coloring (easy version) constructive algorithms, dp, graphs, greedy, sortings	1800	x5972
1295D	Same GCDs math, number theory	1800	x6856
1290B	Irreducible Anagrams binary search, constructive algorithms, data structures, strings, two pointers	1800	x4129
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	1800	x3893
1286A	Garland dp, greedy, sortings	1800	x7129
1283E	New Year Parties dp, greedy	1800	x5351
1283D	Christmas Trees graphs, greedy, shortest paths	1800	x6256
1282C	Petya and Exam greedy, sortings, two pointers	1800	x3717
1280B	Beingawesomeism implementation, math	1800	x3382
1267L	Lexicography constructive algorithms, strings	1800	x2372
1267J	Just Arrange the Icons greedy, implementation, math	1800	x2168
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x3792
1252H	Twin Buildings greedy, implementation	1800	x2294
1250J	The Parade binary search, greedy	1800	x2373
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1800	x2247
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	1800	x4010
1249D1	Too Many Segments (easy version) greedy	1800	x4005
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1800	x6197
1227D2	Optimal Subsequences (Hard Version) data structures, greedy	1800	x3833
1225D	Power Products hashing, math, number theory	1800	x5702
1221D	Make The Fence Great Again dp	1800	x7274
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x4952
1208C	Magic Grid constructive algorithms	1800	x5309
1207D	Number Of Permutations combinatorics	1800	x4995

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