Problemset - Codeforces

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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
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Problems

#	Name
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x993
1616F	Tricolor Triangles brute force, graphs, math, matrices	2900	x597
1616D	Keep the Average High dp, greedy, math	2000	x4937
1616C	Representative Edges brute force, geometry, implementation, math	1500	x12306
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x896
1615E	Purple Crayon data structures, dfs and similar, games, graphs, greedy, math, sortings, trees	2400	x1501
1615C	Menorah brute force, graphs, greedy, math	1600	x8420
1615B	And It's Non-Zero bitmasks, greedy, math	1300	x16102
1615A	Closing The Gap greedy, math	800	x20820
1614C	Divan and bitwise operations bitmasks, combinatorics, constructive algorithms, dp, math	1500	x10319
1613D	MEX Sequences dp, math	1900	x4744
1613A	Long Comparison implementation, math	900	x24693
1612D	X-Magic Pair math, number theory	1600	x9287
1612C	Chat Ban binary search, math	1300	x17825
1611B	Team Composition: Programmers and Mathematicians binary search, constructive algorithms, math	800	x29822
1611A	Make Even constructive algorithms, math	800	x31602
1610E	AmShZ and G.O.A.T. binary search, brute force, greedy, implementation, math	2300	x1707
1610D	Not Quite Lee combinatorics, dp, math, number theory	2000	x2735
1610A	Anti Light's Cell Guessing math	900	x16150
1609G	A Stroll Around the Matrix data structures, greedy, math	3000	x405
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x17193
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1403
1608A	Find Array constructive algorithms, math	800	x19129
1607D	Blue-Red Permutation greedy, math, sortings	1300	x16959
1607B	Odd Grasshopper math	900	x26823
1606E	Arena combinatorics, dp, math	2100	x3581
1606B	Update Files greedy, implementation, math	1100	x18726
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1057
1605A	A.M. Deviation math, number theory	800	x20697
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x287
1603E	A Perfect Problem combinatorics, dp, math	3200	x482
1603C	Extreme Extension dp, greedy, math, number theory	2300	x2061
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13675
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16757
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x188
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x14854
1600F	Party Organization brute force, math, probabilities	2300	x499
1599H	Hidden Fortress interactive, math	2100	x1078
1599G	Shortest path brute force, geometry, math, shortest paths	2700	x371
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1687
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x340
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2334
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x8787
1598C	Delete Two Elements data structures, dp, implementation, math, two pointers	1200	x21092
1594F	Ideal Farm constructive algorithms, math	2400	x1380
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1495
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x11245
1594C	Make Them Equal brute force, greedy, math, strings	1200	x19860
1594B	Special Numbers bitmasks, math	1100	x20079
1594A	Consecutive Sum Riddle math	800	x24883
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2468
1593D2	Half of Same brute force, math, number theory	1900	x5085
1593D1	All are Same math, number theory	1100	x20319
1593B	Make it Divisible by 25 dfs and similar, dp, greedy, math, math	900	x27707
1593A	Elections math	800	x37078
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1667
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2325
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x16066
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x22393
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x204
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1258
1585D	Yet Another Sorting Problem data structures, math	1900	x3890
1584D	Guess the Permutation binary search, combinatorics, interactive, math	2000	x3705
1584C	Two Arrays greedy, math, sortings	900	x16507
1584B	Coloring Rectangles greedy, math	1000	x13418
1584A	Mathematical Addition math	800	x14942
1583G	Omkar and Time Travel data structures, math	3000	x464
1583A	Windblume Ode math, number theory	800	x13766
1582E	Pchelyonok and Segments binary search, data structures, dp, greedy, math	2000	x3792
1582D	Vupsen, Pupsen and 0 constructive algorithms, math	1600	x10599
1582B	Luntik and Subsequences combinatorics, math	900	x20920
1582A	Luntik and Concerts math	800	x18606
1581B	Diameter of Graph constructive algorithms, graphs, greedy, math	1200	x11478
1581A	CQXYM Count Permutations combinatorics, math, number theory	800	x13504
1580F	Problems for Codeforces combinatorics, fft, math	3300	x133
1579F	Array Stabilization (AND version) brute force, graphs, math, number theory, shortest paths	1700	x4826
1579E1	Permutation Minimization by Deque constructive algorithms, greedy, math	1000	x21824
1579A	Casimir's String Solitaire math, strings	800	x39094
1578G	Game of Chance math, probabilities	3500	x38
1578E	Easy Scheduling implementation, math	1200	x3847
1575K	Knitting Batik implementation, math	2200	x715
1575G	GCD Festival math, number theory	2200	x713
1575F	Finding Expected Value math	2900	x120
1574E	Coloring combinatorics, constructive algorithms, implementation, math	2500	x917
1574B	Combinatorics Homework combinatorics, greedy, math	1100	x17368
1573B	Swaps greedy, math, sortings	1400	x14655
1571D	Sweepstake *special problem, brute force, constructive algorithms, implementation, math	1800	x335
1571B	Epic Novel *special problem, math	1300	x721
1569C	Jury Meeting combinatorics, math	1500	x12111
1567E	Non-Decreasing Dilemma data structures, divide and conquer, math	2200	x3721
1567D	Expression Evaluation Error constructive algorithms, greedy, implementation, math	2000	x4538
1567C	Carrying Conundrum bitmasks, combinatorics, dp, math	1600	x12238
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x129
1566A	Median Maximization binary search, greedy, math	800	x23546
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x409
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	x13376
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19700
1562A	The Miracle and the Sleeper greedy, math	800	x25690