Problemset - Codeforces

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Educational Codeforces Round 173 (Rated for Div. 2)
30:11:00
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Problems

#	Name
1881B	Three Threadlets math	900	x25893
1881A	Don't Try to Count brute force, strings	800	x33760
1879F	Last Man Standing brute force, data structures, number theory	2800	x523
1879E	Interactive Game with Coloring brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees	2400	x1292
1879D	Sum of XOR Functions bitmasks, combinatorics, divide and conquer, dp, math	1700	x7677
1879C	Make it Alternating combinatorics, dp, greedy	1300	x17684
1879B	Chips on the Board constructive algorithms, greedy	900	x22894
1879A	Rigged! greedy	800	x23332
1878G	wxhtzdy ORO Tree binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees	2300	x1217
1878F	Vasilije Loves Number Theory brute force, math, number theory	1900	x4220
1878E	Iva & Pav binary search, bitmasks, data structures, greedy	1400	x13451
1878D	Reverse Madness data structures, greedy	1600	x8610
1878C	Vasilije in Cacak math	900	x34819
1878B	Aleksa and Stack constructive algorithms, math	800	x31929
1878A	How Much Does Daytona Cost? greedy	800	x46837
1877C	Joyboard math, number theory	1200	x11279
1877A	Goals of Victory math	800	x25232
1876G	Clubstep binary search, brute force, data structures, greedy, trees	3500	x143
1876F	Indefinite Clownfish binary search, graphs	3500	x150
1876E	Ball-Stackable constructive algorithms, data structures, dp, trees	3300	x275
1876D	Lexichromatography combinatorics, dfs and similar, dsu, graphs, two pointers	2500	x900
1876C	Autosynthesis constructive algorithms, dfs and similar, graphs, greedy, sortings	2100	x2360
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x8547
1876A	Helmets in Night Light greedy, sortings	1000	x19056
1875D	Jellyfish and Mex dp	1600	x9044
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x12006
1875A	Jellyfish and Undertale brute force, greedy	900	x27118
1874G	Jellyfish and Inscryption dp	3500	x93
1874F	Jellyfish and OEIS dp	3500	x219
1874E	Jellyfish and Hack dp, math	3000	x332
1874D	Jellyfish and Miku divide and conquer, dp, math, probabilities	2800	x749
1874C	Jellyfish and EVA dp, graphs, greedy, math, probabilities	2300	x1764
1874B	Jellyfish and Math bitmasks, brute force, dfs and similar, dp, graphs, shortest paths	2400	x1170
1874A	Jellyfish and Game brute force, games, greedy, implementation	1200	x17385
1873H	Mad City dfs and similar, dsu, games, graphs, shortest paths, trees	1700	x7671
1873G	ABBC or BACB constructive algorithms, greedy	1500	x13828
1873F	Money Trees binary search, greedy, math, two pointers	1300	x16177
1873E	Building an Aquarium binary search, sortings	1100	x28186
1873D	1D Eraser greedy, implementation, two pointers	800	x36147
1873C	Target Practice implementation, math	800	x42966
1873B	Good Kid brute force, greedy, math	800	x50655
1873A	Short Sort brute force, implementation	800	x56639
1872G	Replace With Product brute force, greedy, math	2000	x4385
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x6514
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x14250
1872D	Plus Minus Permutation math	1200	x25154
1872C	Non-coprime Split math, number theory	1100	x23802
1872B	The Corridor or There and Back Again greedy, implementation	900	x28237
1872A	Two Vessels brute force, greedy, math	800	x39681
1870H	Standard Graph Problem data structures, graphs, greedy, trees	3500	x88
1870G	MEXanization data structures	3300	x224
1870F	Lazy Numbers binary search, math	2900	x500
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2425
1870D	Prefix Purchase greedy, implementation, sortings	1800	x7158
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11752
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14415
1870A	MEXanized Array constructive algorithms, greedy, math	800	x19280
1869B	2D Traveling geometry, math, shortest paths, sortings	1100	x16838
1869A	Make It Zero constructive algorithms	900	x22923
1868F	LIS? data structures, greedy, implementation	3500	x79
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x87
1868D	Flower-like Pseudotree constructive algorithms, graphs, greedy, implementation, trees	3000	x291
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1186
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2453
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x7161
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x12213
1867F	Most Different Tree brute force, constructive algorithms, dfs and similar, greedy, hashing	2700	x427
1867E2	Salyg1n and Array (hard version) constructive algorithms, interactive	2200	x3258
1867E1	Salyg1n and Array (simple version) constructive algorithms, interactive, math	2000	x3835
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5932
1867C	Salyg1n and the MEX Game constructive algorithms, data structures, games, greedy, interactive	1300	x11465
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x17021
1867A	green_gold_dog, array and permutation constructive algorithms, sortings	800	x20213
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x829
1866L	Lihmuf Balling binary search, brute force, math	2400	x733
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x456
1866J	Jackets and Packets dp	2800	x293
1866I	Imagination Castle dp, games, two pointers	2300	x784
1866H	Happy Sets combinatorics	2100	x1684
1866G	Grouped Carriages binary search, data structures, dp, flows, greedy	2100	x1764
1866F	Freak Joker Process binary search, data structures, sortings	3100	x137
1866E	Elevators of Tamem dp	2700	x429
1866D	Digital Wallet dp, greedy	2300	x1362
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x3089
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7901
1866A	Ambitious Kid math	800	x24041
1864I	Future Dominators graphs, greedy	3500	x90
1864H	Asterism Stream dp, math, matrices	3200	x298
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x281
1864F	Exotic Queries data structures, implementation, sortings	2300	x1464
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2699
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6914
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13777
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15552
1864A	Increasing and Decreasing constructive algorithms, greedy, implementation, math	800	x20475
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x86
1863H	Goldberg Machine 3 dp, trees	3500	x92
1863G	Swaps combinatorics, dp, graphs, math	2800	x654
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1166
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2817