Problemset - Codeforces

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Codeforces Round (Div. 2)
4 days
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Problems

#	Name
1578H	Higher Order Functions implementation, strings	1700	x2025
1578G	Game of Chance math, probabilities	3500	x38
1578F	Framing Pictures geometry	2900	x163
1578E	Easy Scheduling implementation, math	1200	x3820
1578D	Dragon Curve	3200	x46
1578C	Cactus Lady and her Cing	3500	x9
1578B	Building Forest Trails data structures, dsu	2800	x339
1578A	Anti-Tetris constructive algorithms, graphs, shortest paths	2800	x356
1576A	Communication Routing Challenge *special problem
1575M	Managing Telephone Poles data structures, geometry	2400	x247
1575L	Longest Array Deconstruction data structures, divide and conquer, dp, sortings	2100	x1391
1575K	Knitting Batik implementation, math	2200	x698
1575J	Jeopardy of Dropped Balls binary search, brute force, dsu, implementation	1500	x3806
1575I	Illusions of the Desert data structures, trees	2300	x889
1575H	Holiday Wall Ornaments dp, strings	2200	x613
1575G	GCD Festival math, number theory	2200	x692
1575F	Finding Expected Value math	2900	x120
1575E	Eye-Pleasing City Park Tour data structures, trees	2600	x329
1575D	Divisible by Twenty-Five brute force, dfs and similar, dp	1800	x2526
1575C	Cyclic Sum data structures, fft, number theory	3000	x163
1575B	Building an Amusement Park binary search, geometry	2300	x472
1575A	Another Sorting Problem data structures, sortings, strings	1100	x4559
1574F	Occurrences combinatorics, dfs and similar, dp, dsu, fft, graphs	2700	x623
1574E	Coloring combinatorics, constructive algorithms, implementation, math	2500	x910
1574D	The Strongest Build binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation	2000	x4492
1574C	Slay the Dragon binary search, greedy, sortings, ternary search	1300	x17073
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17296
1574A	Regular Bracket Sequences constructive algorithms	800	x21792
1573B	Swaps greedy, math, sortings	1400	x14555
1573A	Countdown greedy	800	x21157
1572F	Stations data structures	3400	x256
1572E	Polygon binary search, dp, geometry	3000	x286
1572D	Bridge Club flows, graph matchings, graphs, greedy	2800	x506
1572C	Paint dp, greedy	2700	x1485
1572B	Xor of 3 brute force, constructive algorithms, greedy, two pointers	2500	x1834
1572A	Book binary search, brute force, data structures, dp, graphs, implementation, sortings	1800	x8994
1571J	Two Railroads *special problem	3000	x40
1571I	Physical Examination *special problem, binary search, data structures	3200	x58
1571H	Laser Beams *special problem, geometry, probabilities	2900	x48
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x75
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x182
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x337
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x332
1571C	Rhyme *special problem, implementation	1800	x376
1571B	Epic Novel *special problem, math	1300	x714
1571A	Sequence of Comparisons *special problem	800	x1297
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x238
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x806
1569D	Inconvenient Pairs binary search, data structures, implementation, sortings, two pointers	1900	x4379
1569C	Jury Meeting combinatorics, math	1500	x12016
1569B	Chess Tournament constructive algorithms	1000	x18845
1569A	Balanced Substring implementation	800	x25538
1567F	One-Four Overload 2-sat, constructive algorithms, dfs and similar, dsu, graphs, implementation	2700	x751
1567E	Non-Decreasing Dilemma data structures, divide and conquer, math	2200	x3638
1567D	Expression Evaluation Error constructive algorithms, greedy, implementation, math	2000	x4508
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12172
1567B	MEXor Mixup bitmasks, greedy	1000	x23022
1567A	Domino Disaster implementation, strings	800	x30067
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x129
1566G	Four Vertices constructive algorithms, data structures, graphs, greedy, implementation, shortest paths	3100	x339
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x956
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4123
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x7851
1566D1	Seating Arrangements (easy version) data structures, greedy, sortings	1100	x13996
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17533
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19578
1566A	Median Maximization binary search, greedy, math	800	x23276
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x402
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1407
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2129
1562D1	Two Hundred Twenty One (easy version) data structures, dp, math	1700	x6340
1562C	Rings constructive algorithms, math	1500	x13277
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19590
1562A	The Miracle and the Sleeper greedy, math	800	x25563
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5610
1561C	Deep Down Below binary search, greedy, sortings	1300	x14596
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16564
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4378
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6133
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x7963
1560D	Make a Power of Two greedy, math, strings	1300	x18188
1560C	Infinity Table implementation, math	800	x26574
1560B	Who's Opposite? math	800	x35607
1560A	Dislike of Threes implementation	800	x59700
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2305
1559D2	Mocha and Diana (Hard Version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers	2500	x2653
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x13802
1559C	Mocha and Hiking constructive algorithms, graphs	1200	x20436
1559B	Mocha and Red and Blue dp, greedy	900	x22490
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x31286
1558F	Strange Sort data structures, sortings	3300	x390
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x471
1558D	Top-Notch Insertions combinatorics, data structures	2600	x967
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3274
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4790
1558A	Charmed by the Game brute force, math	1300	x11085
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x715
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2549
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8599
1557B	Moamen and k-subarrays greedy, sortings	1100	x23431