Problemset - Codeforces

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Codeforces Round (Div. 2)
7 days

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Problems

#	Name
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x16954
1762A	Divide and Conquer greedy, math, number theory	800	x19059
1761G	Centroid Guess interactive, probabilities, trees	3500	x111
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x81
1761F1	Anti-median (Easy Version) dp, math	3100	x206
1761E	Make It Connected binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers	2400	x1834
1761D	Carry Bit combinatorics, math	2100	x2448
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9586
1761B	Elimination of a Ring constructive algorithms, greedy, implementation	1000	x13446
1761A	Two Permutations brute force, constructive algorithms	800	x19684
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7352
1760F	Quests binary search, greedy, sortings	1500	x12225
1760E	Binary Inversions data structures, greedy, math	1100	x20303
1760D	Challenging Valleys implementation, two pointers	1000	x23665
1760C	Advantage data structures, implementation, sortings	800	x37049
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x44494
1760A	Medium Number implementation, sortings	800	x59152
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4481
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3917
1759E	The Humanoid brute force, dp, sortings	1500	x10808
1759D	Make It Round brute force, number theory	1400	x13607
1759C	Thermostat greedy, math, shortest paths	1100	x17634
1759B	Lost Permutation math	800	x22223
1759A	Yes-Yes? implementation, strings	800	x29984
1758F	Decent Division constructive algorithms, data structures	3000	x171
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x842
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7309
1758C	Almost All Multiples greedy, number theory	1400	x13628
1758B	XOR = Average constructive algorithms	900	x21260
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x25185
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x18890
1754A	Technical Support greedy	800	x23199
1753F	Minecraft Series brute force, two pointers	3500	x208
1753E	N Machines binary search, brute force, greedy	3300	x332
1753D	The Beach constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1755
1753C	Wish I Knew How to Sort dp, math, probabilities	2000	x4460
1753B	Factorial Divisibility math, number theory	1600	x12766
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10326
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x14913
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x82
1750G	Doping combinatorics, dp, math	3300	x248
1750F	Majority combinatorics, dp, math, strings	2700	x913
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1417
1750D	Count GCD combinatorics, math, number theory	1800	x5877
1750C	Complementary XOR constructive algorithms, implementation	1400	x9554
1750B	Maximum Substring brute force, greedy, implementation	800	x16233
1750A	Indirect Sort constructive algorithms, implementation, math	800	x17059
1749F	Distance to the Path data structures, dfs and similar, trees	2800	x511
1749E	Cactus Wall constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1711
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5580
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x13929
1749B	Death's Blessing greedy	900	x20993
1749A	Cowardly Rooks greedy, implementation	800	x22336
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x335
1748E	Yet Another Array Counting Problem binary search, data structures, divide and conquer, dp, flows, math, trees	2300	x1914
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2817
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11101
1748B	Diverse Substrings brute force, implementation, strings	1400	x15028
1748A	The Ultimate Square math	800	x24066
1747E	List Generation combinatorics, dp, math	2900	x513
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4665
1747C	Swap Game games	1200	x21220
1747B	BAN BAN constructive algorithms	900	x22967
1747A	Two Groups constructive algorithms, greedy	800	x24862
1746G	Olympiad Training binary search, data structures, dp, flows, geometry, implementation, sortings	3500	x96
1746F	Kazaee data structures, hashing, probabilities	2800	x1730
1746E2	Joking (Hard Version) dp, interactive	3200	x395
1746E1	Joking (Easy Version) binary search, constructive algorithms, interactive, ternary search	2500	x1435
1746D	Paths on the Tree dfs and similar, dp, greedy, sortings, trees	1900	x4614
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12802
1746B	Rebellion constructive algorithms, greedy, two pointers	800	x17159
1746A	Maxmina constructive algorithms, greedy	800	x19816
1744F	MEX vs MED math, two pointers	2000	x3088
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5596
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10872
1744D	Divisibility by 2^n greedy, math, sortings	1200	x21419
1744C	Traffic Light binary search, implementation, two pointers	1000	x27244
1744B	Even-Odd Increments implementation, math	800	x23489
1744A	Number Replacement greedy, implementation	800	x27139
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x256
1743F	Intersection and Union data structures, dp, matrices, probabilities	2300	x1502
1743E	FTL binary search, dp	2400	x1580
1743D	Problem with Random Tests brute force, dp, greedy, probabilities	1700	x7594
1743C	Save the Magazines constructive algorithms, dp, greedy	1100	x19165
1743B	Permutation Value constructive algorithms, greedy	800	x22205
1743A	Password brute force, combinatorics, implementation, math	800	x26732
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10744
1742F	Smaller constructive algorithms, greedy, strings	1500	x11667
1742E	Scuza binary search, greedy, math	1200	x24703
1742D	Coprime brute force, greedy, number theory	1100	x23664
1742C	Stripes implementation	900	x32965
1742B	Increasing greedy, implementation, sortings	800	x47697
1742A	Sum implementation	800	x72203
1741G	Kirill and Company bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths	2200	x1498
1741F	Multi-Colored Segments binary search, data structures, math, sortings	2000	x2398
1741E	Sending a Sequence Over the Network dp	1600	x12259
1741D	Masha and a Beautiful Tree dfs and similar, divide and conquer, graphs, sortings, trees	1300	x15220
1741C	Minimize the Thickness brute force, greedy, math, two pointers	1100	x17749
1741B	Funny Permutation constructive algorithms, math	800	x25395
1741A	Compare T-Shirt Sizes implementation, implementation, strings	800	x30802