Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
22:08:27
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Problems

#	Name
1766A	Extremely Round brute force, implementation	800	x27944
1765N	Number Reduction greedy	1500	x5020
1765M	Minimum LCM math, number theory	1000	x16774
1765L	Project Manager brute force, data structures, implementation	2400	x600
1765K	Torus Path greedy, math	1500	x5991
1765J	Hero to Zero graph matchings, math	2900	x217
1765I	Infinite Chess implementation, shortest paths	2800	x219
1765H	Hospital Queue binary search, graphs, greedy, implementation	2200	x1337
1765G	Guess the String constructive algorithms, interactive, probabilities	2600	x416
1765F	Chemistry Lab dp, geometry, probabilities	2200	x621
1765E	Exchange brute force, math	1000	x10329
1765D	Watch the Videos binary search, constructive algorithms, two pointers	1700	x4324
1765C	Card Guessing combinatorics, dp, probabilities	2600	x410
1765B	Broken Keyboard greedy	800	x9164
1765A	Access Levels bitmasks, dsu, flows, graph matchings	2400	x721
1764H	Doremy's Paint 2 data structures	3400	x198
1764G3	Doremy's Perfect DS Class (Hard Version) binary search, interactive	3300	x477
1764G2	Doremy's Perfect DS Class (Medium Version) binary search, interactive	3000	x541
1764G1	Doremy's Perfect DS Class (Easy Version) binary search, interactive	2900	x599
1764F	Doremy's Experimental Tree brute force, constructive algorithms, dfs and similar, dsu, sortings, trees	2500	x1027
1764E	Doremy's Number Line dp, greedy, sortings	2400	x1271
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2828
1764C	Doremy's City Construction graphs, greedy	1400	x9555
1764B	Doremy's Perfect Math Class math, number theory	900	x16146
1764A	Doremy's Paint greedy	800	x16773
1763F	Edge Queries data structures, dfs and similar, dp, dsu, graphs, trees	3000	x496
1763E	Node Pairs dp, graphs, math, number theory	2200	x1843
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x2102
1763C	Another Array Problem brute force, constructive algorithms, greedy	2000	x6823
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14845
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15876
1762G	Unequal Adjacent Elements constructive algorithms, sortings	3100	x103
1762F	Good Pairs binary search, data structures, dp	2600	x692
1762E	Tree Sum combinatorics, math, trees	2600	x690
1762D	GCD Queries constructive algorithms, interactive, number theory	2100	x3723
1762C	Binary Strings are Fun combinatorics, math	1400	x9314
1762B	Make Array Good constructive algorithms, implementation, number theory, sortings	1100	x17150
1762A	Divide and Conquer greedy, math, number theory	800	x19389
1761G	Centroid Guess interactive, probabilities, trees	3500	x118
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x84
1761F1	Anti-median (Easy Version) dp, math	3100	x212
1761E	Make It Connected binary search, brute force, constructive algorithms, dsu, graphs, greedy, matrices, trees, two pointers	2400	x1883
1761D	Carry Bit combinatorics, math	2100	x2496
1761C	Set Construction constructive algorithms, dfs and similar, graphs, greedy	1400	x9729
1761B	Elimination of a Ring constructive algorithms, greedy, implementation	1000	x13587
1761A	Two Permutations brute force, constructive algorithms	800	x20741
1760G	SlavicG's Favorite Problem bitmasks, dfs and similar, graphs	1700	x7560
1760F	Quests binary search, greedy, sortings	1500	x12585
1760E	Binary Inversions data structures, greedy, math	1100	x20782
1760D	Challenging Valleys implementation, two pointers	1000	x24204
1760C	Advantage data structures, implementation, sortings	800	x38244
1760B	Atilla's Favorite Problem greedy, implementation, strings	800	x46017
1760A	Medium Number implementation, sortings	800	x62538
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4571
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3998
1759E	The Humanoid brute force, dp, sortings	1500	x11071
1759D	Make It Round brute force, number theory	1400	x14104
1759C	Thermostat greedy, math, shortest paths	1100	x18027
1759B	Lost Permutation math	800	x22402
1759A	Yes-Yes? implementation, strings	800	x30414
1758F	Decent Division constructive algorithms, data structures	3000	x179
1758E	Tick, Tock combinatorics, dfs and similar, dsu, graphs	2500	x861
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7456
1758C	Almost All Multiples greedy, number theory	1400	x13872
1758B	XOR = Average constructive algorithms	900	x21609
1758A	SSeeeeiinngg DDoouubbllee constructive algorithms, strings	800	x25416
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x19024
1754A	Technical Support greedy	800	x23407
1753F	Minecraft Series brute force, two pointers	3500	x214
1753E	N Machines binary search, brute force, greedy	3300	x333
1753D	The Beach constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1786
1753C	Wish I Knew How to Sort dp, math, probabilities	2000	x4599
1753B	Factorial Divisibility math, number theory	1600	x13061
1753A2	Make Nonzero Sum (hard version) constructive algorithms, dp, greedy	1500	x10556
1753A1	Make Nonzero Sum (easy version) constructive algorithms, dp, greedy	1300	x15208
1750H	BinaryStringForces constructive algorithms, data structures, dp	3500	x85
1750G	Doping combinatorics, dp, math	3300	x251
1750F	Majority combinatorics, dp, math, strings	2700	x933
1750E	Bracket Cost binary search, data structures, divide and conquer, dp, greedy, strings	2400	x1457
1750D	Count GCD combinatorics, math, number theory	1800	x6093
1750C	Complementary XOR constructive algorithms, implementation	1400	x9671
1750B	Maximum Substring brute force, greedy, implementation	800	x16321
1750A	Indirect Sort constructive algorithms, implementation, math	800	x17174
1749F	Distance to the Path data structures, dfs and similar, trees	2800	x527
1749E	Cactus Wall constructive algorithms, dfs and similar, graphs, shortest paths	2400	x1763
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5654
1749C	Number Game binary search, data structures, games, greedy, implementation	1400	x14197
1749B	Death's Blessing greedy	900	x21185
1749A	Cowardly Rooks greedy, implementation	800	x22471
1748F	Circular Xor Reversal bitmasks, constructive algorithms	3000	x340
1748E	Yet Another Array Counting Problem binary search, data structures, divide and conquer, dp, flows, math, trees	2300	x2011
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2872
1748C	Zero-Sum Prefixes brute force, data structures, dp, greedy, implementation	1600	x11378
1748B	Diverse Substrings brute force, implementation, strings	1400	x15250
1748A	The Ultimate Square math	800	x24246
1747E	List Generation combinatorics, dp, math	2900	x529
1747D	Yet Another Problem binary search, bitmasks, constructive algorithms, data structures	1900	x4765
1747C	Swap Game games	1200	x21554
1747B	BAN BAN constructive algorithms	900	x23468
1747A	Two Groups constructive algorithms, greedy	800	x25139