Problemset - Codeforces

Problems

#	Name
2226F	Inversion Invasion math, number theory		x163
2226B	Everything Everywhere greedy, math, math, number theory, number theory		x9628
2225G	Simple Problem brute force, graphs, greedy, number theory		x183
2219A	Grid L brute force, constructive algorithms, math, number theory		x8882
2218D	The 67th OEIS Problem constructive algorithms, greedy, greedy, greedy, math, math, number theory	1100	x18197
2217C	Grid Covering chinese remainder theorem, math, number theory	1300	x10312
2215B	RReeppeettiittiioonn binary search, brute force, implementation, math, number theory	2000	x968
2211E	Minimum Path Cover brute force, dp, greedy, interactive, interactive, math, number theory, trees	2500	x845
2210E	Binary Strings are Simple? constructive algorithms, implementation, interactive, number theory	2700	x315
2210C2	A Simple GCD Problem (Hard Version) dp, greedy, number theory	2100	x2130
2210C1	A Simple GCD Problem (Easy Version) greedy, number theory	1200	x12680
2210A	A Simple Sequence constructive algorithms, dp, greedy, number theory	800	x22080
2206I	Growth Factor combinatorics, dp, math, number theory	2900	x165
2206H	Reflect Sort number theory	1800	x837
2206F	Minesweeper String fft, number theory	2400	x416
2205G	Simons and Diophantus Equation bitmasks, brute force, data structures, math, number theory	3000	x203
2204F	Sum of Fractions binary search, brute force, combinatorics, data structures, greedy, math, number theory, two pointers	2200	x1217
2204C	Spring math, math, math, math, math, number theory	1000	x17281
2203D	Divisibility Game brute force, games, games, games, greedy, number theory, number theory	1700	x5405
2201E	ABBA Counting fft, fft, math, number theory, strings	2900	x277
2200H	Six Seven divide and conquer, math, number theory, strings, strings, trees	2600	x453
2200E	Divisive Battle games, greedy, math, number theory	1500	x8007
2195A	Sieve of Erato67henes math, number theory	800	x35366
2194C	Secret message bitmasks, brute force, dp, math, number theory	1300	x10864
2193E	Product Queries dp, math, number theory, shortest paths	1300	x15163
2190D	Prufer Vertex combinatorics, dsu, number theory, probabilities, trees	2500	x950
2189D2	Little String (Hard Version) combinatorics, dp, greedy, math, number theory	2200	x1943
2189D1	Little String (Easy Version) combinatorics, dp, greedy, math, number theory	1900	x3953
2183E	LCM is Legendary Counting Master dp, math, number theory	2100	x2849
2181H	Honey Cake brute force, math, number theory	1200	x6578
2180C	XOR-factorization bitmasks, constructive algorithms, dp, greedy, number theory	1900	x6452
2180A	Carnival Wheel brute force, number theory	800	x25853
2179F	Blackslex and Another RGB Walking communication, constructive algorithms, graphs, interactive, number theory, trees	2000	x2743
2179C	Blackslex and Number Theory implementation, math, number theory, sortings	1100	x22276
2178H	Create or Duplicate bitmasks, graphs, number theory, shortest paths	3300	x311
2176F	Omega Numbers bitmasks, combinatorics, dp, math, number theory	2400	x1485
2173C	Kanade's Perfect Multiples brute force, constructive algorithms, greedy, number theory	1400	x12348
2171E	Anisphia Wynn Palettia and Good Permutations constructive algorithms, greedy, number theory	2000	x3641
2169D2	Removal of a Sequence (Hard Version) binary search, divide and conquer, greedy, implementation, math, number theory	2100	x2269
2169D1	Removal of a Sequence (Easy Version) binary search, implementation, math, number theory	1500	x8526
2167D	Yet Another Array Problem brute force, implementation, math, number theory	1000	x30158
2164B	Even Modulo Pair brute force, math, number theory	1000	x18221
2158F2	Distinct GCDs (Hard Version) combinatorics, constructive algorithms, graphs, math, number theory, number theory	3000	x246
2158F1	Distinct GCDs (Easy Version) constructive algorithms, graphs, math, number theory	2600	x401
2156C	Maximum GCD on Whiteboard greedy, math, number theory	1400	x12266
2154C2	No Cost Too Great (Hard Version) greedy, math, number theory	2000	x5506
2154C1	No Cost Too Great (Easy Version) greedy, implementation, math, number theory	1400	x13528
2153E	Zero Trailing Factorial brute force, math, number theory	2400	x984
2148G	Farmer John's Last Wish binary search, data structures, math, number theory	1900	x4188
2147G	Modular Tetration combinatorics, math, number theory	3100	x359
2145F	Long Journey dfs and similar, divide and conquer, dp, graphs, greedy, math, matrices, number theory	2500	x981
2144A	Cut the Array brute force, constructive algorithms, math, number theory	800	x21668
2140F	Sum Minimisation number theory	2900	x313
2140B	Another Divisibility Problem constructive algorithms, math, number theory	900	x22111
2138E2	Determinant Construction (Hard Version) brute force, constructive algorithms, math, matrices, number theory	3100	x184
2138E1	Determinant Construction (Easy Version) brute force, constructive algorithms, math, matrices, number theory	3100	x239
2137B	Fun Permutation constructive algorithms, math, number theory	900	x26441
2135E2	Beyond the Palindrome (Hard Version) combinatorics, dp, math, number theory	3500	x166
2134B	Add 0 or K constructive algorithms, math, number theory	1200	x20849
2131H	Sea, You & copriMe brute force, constructive algorithms, graphs, greedy, math, number theory	2600	x883
2131C	Make it Equal math, number theory	1100	x21603
2126E	G-C-D, Unlucky! math, number theory	1400	x16995
2125C	Count Good Numbers bitmasks, combinatorics, math, number theory	1100	x22733
2125B	Left and Down math, number theory	900	x27344
2124C	Subset Multiplication constructive algorithms, greedy, math, number theory	1300	x14580
2123G	Modular Sorting brute force, data structures, greedy, math, number theory, sortings	2100	x3246
2123F	Minimize Fixed Points constructive algorithms, number theory	1700	x9754
2118D2	Red Light, Green Light (Hard version) binary search, brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2200	x2496
2118D1	Red Light, Green Light (Easy version) brute force, dfs and similar, dp, graphs, implementation, number theory	1700	x8448
2117D	Retaliation binary search, math, number theory	1200	x22109
2115A	Gellyfish and Flaming Peony constructive algorithms, dp, math, number theory	1500	x14936
2114G	Build an Array brute force, constructive algorithms, dp, greedy, math, number theory	2200	x2036
2114F	Small Operations binary search, brute force, dfs and similar, dp, math, number theory, sortings	2000	x5496
2112E	Tree Colorings combinatorics, dfs and similar, dp, graphs, math, number theory, trees	2200	x3376
2110F	Faculty brute force, greedy, math, number theory	2400	x1913
2109C3	Hacking Numbers (Hard Version) constructive algorithms, interactive, math, number theory	2600	x3189
2109C2	Hacking Numbers (Medium Version) constructive algorithms, interactive, math, number theory	1700	x8623
2109C1	Hacking Numbers (Easy Version) bitmasks, constructive algorithms, interactive, math, number theory	1500	x11405
2107A	LRC and VIP greedy, number theory	800	x22198
2104D	Array and GCD binary search, greedy, math, number theory	1400	x13219
2097C	Bermuda Triangle chinese remainder theorem, geometry, implementation, math, number theory	2400	x1024
2095I	Mysterious Script *special problem, expression parsing, number theory		x639
2095E	Pair Count *special problem, number theory		x785
2094H	La Vaca Saturno Saturnita binary search, brute force, math, number theory	1900	x3785
2093C	Simple Repetition math, number theory	1000	x30827
2092F	Andryusha and CCB brute force, constructive algorithms, greedy, math, number theory, strings	2900	x432
2092A	Kamilka and the Sheep greedy, math, number theory, sortings	800	x28307
2091G	Gleb and Boating brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths	2300	x1522
2091E	Interesting Ratio brute force, math, number theory, two pointers	1300	x19621
2089A	Simple Permutation constructive algorithms, number theory	1700	x7188
2085E	Serval and Modulo constructive algorithms, math, number theory	2200	x3150
2084B	MIN = GCD greedy, math, number theory	1100	x16596
2081G1	Hard Formula math, number theory	3100	x81
2081D	MST in Modulo Graph constructive algorithms, dsu, graphs, greedy, math, number theory, sortings, trees	2600	x1182
2077G	RGB Walking bitmasks, chinese remainder theorem, dfs and similar, graphs, number theory	3500	x135
2072G	I've Been Flipping Numbers for 300 Years and Calculated the Sum binary search, brute force, combinatorics, divide and conquer, math, number theory	2200	x2146
2072F	Goodbye, Banker Life 2-sat, bitmasks, combinatorics, constructive algorithms, fft, math, number theory	1700	x8426
2071A	The Play Never Ends math, number theory	800	x27833
2065G	Skibidus and Capping combinatorics, math, number theory	1700	x6277
2063A	Minimal Coprime math, number theory	800	x31749