Problemset - Codeforces

Problems

#	Name
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x409
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1424
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2141
1562D1	Two Hundred Twenty One (easy version) data structures, dp, math	1700	x6373
1562C	Rings constructive algorithms, math	1500	x13378
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19700
1562A	The Miracle and the Sleeper greedy, math	800	x25693
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5655
1561C	Deep Down Below binary search, greedy, sortings	1300	x14971
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16611
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4427
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6185
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x8103
1560D	Make a Power of Two greedy, math, strings	1300	x18286
1560C	Infinity Table implementation, math	800	x26728
1560B	Who's Opposite? math	800	x35952
1560A	Dislike of Threes implementation	800	x60932
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2332
1559D2	Mocha and Diana (Hard Version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers	2500	x2680
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x13986
1559C	Mocha and Hiking constructive algorithms, graphs	1200	x20648
1559B	Mocha and Red and Blue dp, greedy	900	x22661
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x31987
1558F	Strange Sort data structures, sortings	3300	x394
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x478
1558D	Top-Notch Insertions combinatorics, data structures	2600	x977
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3308
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4832
1558A	Charmed by the Game brute force, math	1300	x11124
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x718
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2583
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8662
1557B	Moamen and k-subarrays greedy, sortings	1100	x23545
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x28000
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x376
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x340
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1264
1556E	Equilibrium data structures, dp, greedy	2200	x2734
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x7062
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5824
1556B	Take Your Places! implementation	1300	x12744
1556A	A Variety of Operations math	800	x18117
1555F	Good Graph data structures, dsu, graphs, trees	2700	x864
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x4068
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12531
1555C	Coin Rows brute force, constructive algorithms, dp, implementation	1300	x21972
1555B	Two Tables brute force	1300	x16160
1555A	PizzaForces brute force, math	900	x28279
1554E	You dfs and similar, dp, math, number theory	2600	x1238
1554D	Diane constructive algorithms, greedy, strings	1800	x9557
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x8976
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12877
1554A	Cherry greedy	800	x29492
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x205
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x714
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x1051
1553F	Pairwise Modulo data structures, math	2300	x2242
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3368
1553D	Backspace dp, greedy, strings, two pointers	1500	x13846
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x18027
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x14231
1553A	Digits Sum math, number theory	800	x31269
1552I	Organizing a Music Festival dfs and similar, math	3400	x130
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x393
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x534
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2972
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1905
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7088
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5951
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15550
1552A	Subsequence Permutation sortings, strings	800	x23952
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1857
1551E	Fixed Points binary search, brute force, dp	2000	x3984
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2781
1551D1	Domino (easy version) constructive algorithms, math	1700	x7136
1551C	Interesting Story greedy, sortings, strings	1500	x13401
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15602
1551B1	Wonderful Coloring - 1 greedy, strings	800	x29615
1551A	Polycarp and Coins greedy, math	800	x51537
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x682
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1552
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1859
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10241
1550B	Maximum Cost Deletion greedy, math	1000	x26612
1550A	Find The Array greedy, math	800	x28234
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x24576
1549A	Gregor and Cryptography math, number theory	800	x32752
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x463
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x265
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1478
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1844
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9994
1548A	Web of Lies brute force, graphs, greedy	1400	x16533
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x3029
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x5920
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x14583
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x16820
1547C	Pair Programming greedy, two pointers	1100	x22814
1547B	Alphabetical Strings greedy, implementation, strings	800	x26513
1547A	Shortest Path with Obstacle implementation, math	800	x30597