Problemset - Codeforces

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Educational Codeforces Round 175 (Rated for Div. 2)
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Problems

#	Name
1571G	A Battle Against a Dragon *special problem, data structures, dp	2500	x79
1571F	Kotlinforces *special problem, constructive algorithms, dp	2000	x209
1571E	Fix the String *special problem, bitmasks, dp, greedy	1700	x345
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x347
1571C	Rhyme *special problem, implementation	1800	x385
1571B	Epic Novel *special problem, math	1300	x731
1571A	Sequence of Comparisons *special problem	800	x1386
1569F	Palindromic Hamiltonian Path brute force, dfs and similar, dp, graphs, hashing	3000	x300
1569E	Playoff Restoration bitmasks, brute force, hashing, implementation, meet-in-the-middle	2600	x823
1569D	Inconvenient Pairs binary search, data structures, implementation, sortings, two pointers	1900	x4450
1569C	Jury Meeting combinatorics, math	1500	x12365
1569B	Chess Tournament constructive algorithms	1000	x19132
1569A	Balanced Substring implementation	800	x25764
1567F	One-Four Overload 2-sat, constructive algorithms, dfs and similar, dsu, graphs, implementation	2700	x766
1567E	Non-Decreasing Dilemma data structures, divide and conquer, math	2200	x3796
1567D	Expression Evaluation Error constructive algorithms, greedy, implementation, math	2000	x4594
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12428
1567B	MEXor Mixup bitmasks, greedy	1000	x24687
1567A	Domino Disaster implementation, strings	800	x30515
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x134
1566G	Four Vertices constructive algorithms, data structures, graphs, greedy, implementation, shortest paths	3100	x346
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x970
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4237
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x8030
1566D1	Seating Arrangements (easy version) data structures, greedy, sortings	1100	x14213
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17981
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x20212
1566A	Median Maximization binary search, greedy, math	800	x23906
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x411
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1442
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2167
1562D1	Two Hundred Twenty One (easy version) data structures, dp, math	1700	x6436
1562C	Rings constructive algorithms, math	1500	x13584
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19924
1562A	The Miracle and the Sleeper greedy, math	800	x25827
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5725
1561C	Deep Down Below binary search, greedy, sortings	1300	x15822
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16767
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4527
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6291
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x8245
1560D	Make a Power of Two greedy, math, strings	1300	x18538
1560C	Infinity Table implementation, math	800	x26993
1560B	Who's Opposite? math	800	x36619
1560A	Dislike of Threes implementation	800	x63431
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2379
1559D2	Mocha and Diana (Hard Version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers	2500	x2725
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x14345
1559C	Mocha and Hiking constructive algorithms, graphs	1200	x21068
1559B	Mocha and Red and Blue dp, greedy	900	x22904
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x33827
1558F	Strange Sort data structures, sortings	3300	x409
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x532
1558D	Top-Notch Insertions combinatorics, data structures	2600	x1006
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3420
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4919
1558A	Charmed by the Game brute force, math	1300	x11193
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x724
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2611
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8856
1557B	Moamen and k-subarrays greedy, sortings	1100	x23744
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x28232
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x382
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x352
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1328
1556E	Equilibrium data structures, dp, greedy	2200	x2773
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x7290
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5882
1556B	Take Your Places! implementation	1300	x12868
1556A	A Variety of Operations math	800	x18172
1555F	Good Graph data structures, dsu, graphs, trees	2700	x890
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x4150
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12999
1555C	Coin Rows brute force, constructive algorithms, dp, implementation	1300	x22394
1555B	Two Tables brute force	1300	x16369
1555A	PizzaForces brute force, math	900	x28848
1554E	You dfs and similar, dp, math, number theory	2600	x1257
1554D	Diane constructive algorithms, greedy, strings	1800	x9755
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x9111
1554B	Cobb bitmasks, brute force, greedy, math	1700	x13074
1554A	Cherry greedy	800	x29895
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x230
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x760
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x1106
1553F	Pairwise Modulo data structures, math	2300	x2283
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3441
1553D	Backspace dp, greedy, strings, two pointers	1500	x14075
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x18328
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x14364
1553A	Digits Sum math, number theory	800	x31949
1552I	Organizing a Music Festival dfs and similar, math	3400	x132
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x401
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x543
1552F	Telepanting binary search, data structures, dp, sortings	2200	x3004
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1951
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7280
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x6008
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15818
1552A	Subsequence Permutation sortings, strings	800	x24151
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1925