1800 ≤ Rating ≤ 1899 (Extra)

Extra problems for users satisfying this condition: 1800 <= Codeforces Rating <= 1899 (Extra).

LEVEL Expert

PROBLEMS 200

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COMPLETION 0 / 200

PROBLEM SET

All Problems

#	PROBLEM	RATING	DIFFICULTY	TAGS
01	George and Accommodation CF-467/A	800	LVL 1	implementation
02	Spit Problem CF-29/A	1000	LVL 1	brute force
03	Sereja and Mugs CF-426/A	800	LVL 1	implementation
04	Playing with Dice CF-378/A	800	LVL 1	brute force
05	Kyoya and Photobooks CF-554/A	900	LVL 1	brute forcemathstrings
06	Haiku CF-78/A	800	LVL 1	implementationstrings
07	Soroban CF-363/A	800	LVL 1	implementation
08	Table CF-359/A	1000	LVL 2	constructive algorithmsgreedyimplementation
09	Valera and Plates CF-369/A	900	LVL 2	greedyimplementation
10	Sinking Ship CF-63/A	900	LVL 2	implementationsortingsstrings
11	Case of the Zeros and Ones CF-556/A	900	LVL 2	greedy
12	Drazil and Date CF-515/A	1000	LVL 2	math
13	Bear and Raspberry CF-385/A	1000	LVL 2	brute forcegreedyimplementation
14	Worms Evolution CF-31/A	1200	LVL 2	implementation
15	Group of Students CF-357/A	1000	LVL 2	brute forcegreedyimplementation
16	Lever CF-376/A	900	LVL 2	implementationmath
17	Lucky Ticket CF-146/A	800	LVL 2	implementation
18	Game With Sticks CF-451/A	900	LVL 2	implementation
19	Depression CF-80/B	1200	LVL 2	geometrymath
20	Easter Eggs CF-78/B	1200	LVL 2	constructive algorithmsimplementation
21	Vasya and Digital Root CF-355/A	1100	LVL 2	constructive algorithmsimplementation
22	Sereja and Coat Rack CF-368/A	1000	LVL 2	implementation
23	Multiplication Table CF-577/A	1000	LVL 2	implementationnumber theory
24	Canvas Frames CF-127/B	1000	LVL 3	implementation
25	Petya and Staircases CF-362/B	1100	LVL 3	implementationsortings
26	Progress Bar CF-71/B	1300	LVL 3	implementationmath
27	A and B and Compilation Errors CF-519/B	1100	LVL 3	data structuresimplementationsortings
28	Bear and Strings CF-385/B	1200	LVL 3	brute forcegreedyimplementation +2
29	Dorm Water Supply CF-107/A	1400	LVL 3	dfs and similargraphs
30	Permutation CF-359/B	1400	LVL 3	constructive algorithmsdpmath
31	Appleman and Toastman CF-461/A	1200	LVL 3	greedysortings
32	Strings of Power CF-318/B	1300	LVL 3	implementationstringstwo pointers
33	Lexicographically Maximum Subsequence CF-196/A	1100	LVL 3	greedystrings
34	Whose sentence is it? CF-312/A	1100	LVL 3	implementationstrings
35	Milking cows CF-383/A	1600	LVL 3	data structuresgreedy
36	Sereja and Stairs CF-381/B	1100	LVL 3	greedyimplementationsortings
37	Good Number CF-365/A	1100	LVL 3	implementation
38	Mashmokh and Numbers CF-414/A	1500	LVL 3	constructive algorithmsnumber theory
39	Fox and Number Game CF-389/A	1000	LVL 3	greedymath
40	Levko and Permutation CF-361/B	1200	LVL 3	constructive algorithmsmathnumber theory
41	Xor-tree CF-429/A	1300	LVL 3	dfs and similartrees
42	Prizes, Prizes, more Prizes CF-208/D	1200	LVL 3	implementation
43	Find Pair CF-160/C	1700	LVL 4	implementationmathsortings
44	Magic Box CF-231/D	1600	LVL 4	brute forcegeometry
45	Bits CF-484/A	1700	LVL 4	bitmasksconstructive algorithms
46	History CF-137/C	1500	LVL 4	sortings
47	Remainders Game CF-687/B	1800	LVL 4	chinese remainder theoremmathnumber theory
48	Guess Your Way Out! CF-507/C	1700	LVL 4	implementationmathtrees
49	Guest From the Past CF-625/A	1700	LVL 4	implementationmath
50	Magical Boxes CF-269/A	1600	LVL 4	greedymath
51	Prime Permutation CF-123/A	1300	LVL 4	implementationnumber theorystrings
52	Yaroslav and Sequence CF-301/A	1800	LVL 4	constructive algorithms
53	Division into Teams CF-149/C	1500	LVL 4	greedymathsortings
54	School Marks CF-540/B	1700	LVL 4	greedyimplementation
55	Prime Swaps CF-432/C	1800	LVL 4	greedysortings
56	Cutting Figure CF-193/A	1700	LVL 4	constructive algorithmsgraphstrees
57	Vasily the Bear and Sequence CF-336/C	1800	LVL 4	brute forcegreedyimplementation +1
58	Alyona and a tree CF-739/B	1900	LVL 4	binary searchdata structuresdfs and similar +2
59	Ilya and Sticks CF-525/C	1600	LVL 4	greedymathsortings
60	Heap Operations CF-681/C	1600	LVL 4	constructive algorithmsdata structuresgreedy
61	Report CF-631/C	1700	LVL 4	data structuressortings
62	Bear and Blocks CF-573/B	1600	LVL 4	binary searchdata structuresdp +1
63	Kolya and Tanya CF-584/B	1500	LVL 4	combinatorics
64	Bracket Sequence CF-223/A	1700	LVL 4	data structuresexpression parsingimplementation
65	Dreamoon and Sets CF-476/D	1900	LVL 4	constructive algorithmsgreedymath
66	Lazy Student CF-605/B	1700	LVL 4	constructive algorithmsdata structuresgraphs
67	Olympiad CF-222/D	1900	LVL 4	binary searchgreedysortings +1
68	The Child and Zoo CF-437/D	1900	LVL 4	dsusortings
69	Queue CF-545/D	1300	LVL 4	greedyimplementationsortings
70	Approximating a Constant Range CF-602/B	1400	LVL 4	dpimplementationtwo pointers
71	Biridian Forest CF-329/B	1500	LVL 4	dfs and similarshortest paths
72	Amr and Pins CF-507/B	1400	LVL 4	geometrymath
73	Levko and Array Recovery CF-360/A	1700	LVL 4	greedyimplementation
74	Robin Hood CF-671/B	2000	LVL 4	binary searchgreedy
75	Quiz CF-337/C	1600	LVL 4	binary searchgreedymath +2
76	Polo the Penguin and XOR operation CF-288/C	1700	LVL 4	implementationmath
77	Dynasty Puzzles CF-191/A	1500	LVL 4	dp
78	k-Multiple Free Set CF-274/A	1500	LVL 4	binary searchgreedysortings
79	Tree Construction CF-675/D	1800	LVL 4	data structurestrees
80	Misha and Permutations Summation CF-501/D	2000	LVL 4	data structures
81	Inna and Nine CF-374/B	1500	LVL 4	combinatoricsgreedy
82	Two Substrings CF-550/A	1500	LVL 4	brute forcedpgreedy +2
83	Alyona and the Tree CF-682/C	1600	LVL 4	dfs and similardpgraphs +1
84	Subsegments CF-69/E	1800	LVL 4	data structuresimplementation
85	Toy Sum CF-405/D	1700	LVL 4	greedyimplementationmath
86	Alice and Bob CF-346/A	1600	LVL 4	gamesmathnumber theory
87	Non-Secret Cypher CF-190/D	1900	LVL 4	two pointers
88	Petya and His Friends CF-66/D	1700	LVL 4	constructive algorithmsmathnumber theory
89	Alternating Current CF-343/B	1600	LVL 4	data structuresgreedyimplementation
90	The Big Race CF-592/C	1800	LVL 4	math
91	Cycles CF-232/A	1600	LVL 4	binary searchconstructive algorithmsgraphs +1
92	The Values You Can Make CF-687/C	1900	LVL 4	dp
93	Road Map CF-34/D	1600	LVL 4	dfs and similargraphs
94	Newspaper Headline CF-91/A	1500	LVL 4	greedystrings
95	Valera and Contest CF-369/B	1400	LVL 4	constructive algorithmsimplementationmath
96	Ivan and Powers of Two CF-305/C	1600	LVL 4	greedyimplementation
97	Polyline CF-617/D	1700	LVL 4	constructive algorithmsimplementation
98	Inna and Sequence CF-374/D	2000	LVL 4	binary searchdata structuresdp +1
99	Anagram Search CF-144/C	1500	LVL 4	implementationstrings
100	Chips CF-333/B	1800	LVL 4	greedy
101	Fish Weight CF-297/B	1600	LVL 4	constructive algorithmsgreedy
102	Rational Resistance CF-343/A	1600	LVL 4	mathnumber theory
103	Falling Anvils CF-77/B	1800	LVL 4	mathprobabilities
104	Maximal Area Quadrilateral CF-340/B	2100	LVL 4	brute forcegeometry
105	Find Maximum CF-353/C	1600	LVL 4	implementationmathnumber theory
106	Jeff and Furik CF-351/B	1900	LVL 4	combinatoricsdpprobabilities
107	Making Sequences is Fun CF-373/B	1600	LVL 4	binary searchimplementationmath
108	Multitasking CF-384/B	1500	LVL 4	greedyimplementationsortings +1
109	Vasiliy's Multiset CF-706/D	1800	LVL 4	binary searchbitmasksdata structures +1
110	Woodcutters CF-545/C	1500	LVL 4	dpgreedy
111	More Cowbell CF-604/B	1400	LVL 4	binary searchgreedy
112	Watering Flowers CF-617/C	1600	LVL 4	implementation
113	Planets CF-229/B	1700	LVL 4	binary searchdata structuresgraphs +1
114	Zuma CF-607/B	1900	LVL 4	dp
115	OR in Matrix CF-486/B	1300	LVL 4	greedyhashingimplementation
116	Divisible by Seven CF-375/A	1600	LVL 4	mathnumber theory
117	Dima and Two Sequences CF-272/D	1600	LVL 4	combinatoricsmathsortings
118	Queue CF-91/B	1500	LVL 4	binary searchdata structures
119	Dima and Lisa CF-584/D	1800	LVL 4	brute forcemathnumber theory
120	Running Track CF-615/C	2000	LVL 5	dpgreedystrings +1
121	Mike and Geometry Problem CF-689/E	2000	LVL 5	combinatoricsdata structuresdp +2
122	Flawed Flow CF-269/C	2100	LVL 5	constructive algorithmsflowsgraphs +1
123	Love Triangles CF-553/C	2200	LVL 5	dfs and similardsugraphs
124	Subway Innovation CF-371/E	2000	LVL 5	greedymathtwo pointers
125	Gifts by the List CF-681/D	2000	LVL 5	constructive algorithmsdfs and similargraphs +1
126	Black and White Tree CF-260/D	2100	LVL 5	constructive algorithmsdsugraphs +2
127	Anton and Ira CF-584/E	2300	LVL 5	constructive algorithmsgreedymath
128	Beavermuncher-0xFF CF-77/C	2100	LVL 5	dfs and similardpdsu +2
129	Last Chance CF-137/E	2000	LVL 5	data structuresimplementationstrings
130	Palindromes CF-137/D	1900	LVL 5	dpstrings
131	Preparing for the Contest CF-377/B	1900	LVL 5	binary searchdata structuresgreedy +1
132	Block Tower CF-327/D	1900	LVL 5	constructive algorithmsdfs and similargraphs
133	Vladik and cards CF-743/E	2200	LVL 5	binary searchbitmasksbrute force +1
134	Beautiful Decomposition CF-279/E	1900	LVL 5	dpgamesgreedy +1
135	Points on Plane CF-576/C	2100	LVL 5	constructive algorithmsdivide and conquergeometry +2
136	Broken Monitor CF-370/D	2100	LVL 5	brute forceconstructive algorithmsgreedy +1
137	Memory and Scores CF-712/D	2200	LVL 5	combinatoricsdpmath
138	Cubes CF-520/D	2100	LVL 5	gamesgreedyimplementation
139	Games with Rectangle CF-128/C	2000	LVL 5	combinatoricsdp
140	Iahub and Permutations CF-340/E	2000	LVL 5	combinatoricsmath
141	Friends and Subsequences CF-689/D	2100	LVL 5	binary searchdata structures
142	Insertion Sort CF-362/C	1900	LVL 5	data structuresdpimplementation +1
143	Vika and Segments CF-610/D	2300	LVL 5	constructive algorithmsdata structuresgeometry +1
144	Persistent Bookcase CF-707/D	2200	LVL 5	bitmasksdata structuresdfs and similar +1
145	Cycle in Graph CF-263/D	1800	LVL 5	dfs and similargraphs
146	Apple Tree CF-348/B	2100	LVL 5	dfs and similarnumber theorytrees
147	Wizards and Huge Prize CF-167/B	1800	LVL 5	dpmathprobabilities
148	3-cycles CF-41/E	1900	LVL 5	constructive algorithmsgraphsgreedy
149	Dima and Containers CF-358/C	2000	LVL 5	constructive algorithmsgreedyimplementation
150	Directed Roads CF-711/D	1900	LVL 5	combinatoricsdfs and similargraphs +1
151	Dima and Magic Guitar CF-366/E	2200	LVL 5	brute forceimplementationmath
152	Free Market CF-364/B	2200	LVL 5	dpgreedy
153	Infinite Maze CF-196/B	2000	LVL 5	dfs and similargraphs
154	Ilya and Roads CF-313/D	2100	LVL 5	dp
155	The Road to Berland is Paved With Good Intentions CF-228/E	1900	LVL 5	2-satdfs and similardsu +1
156	Alyona and Strings CF-682/D	1900	LVL 5	dpstrings
157	Messenger CF-631/D	2100	LVL 5	data structureshashingimplementation +2
158	Police Patrol CF-427/E	2000	LVL 5	greedyimplementationmath +1
159	Xenia and Hamming CF-356/B	1900	LVL 5	implementationmath
160	Let's Play Osu! CF-235/B	2000	LVL 5	dpmathprobabilities
161	Happy Tree Party CF-593/D	2400	LVL 5	data structuresdfs and similargraphs +2
162	Number With The Given Amount Of Divisors CF-27/E	2000	LVL 5	brute forcedpnumber theory
163	Shaass and Lights CF-294/C	1900	LVL 5	combinatoricsnumber theory
164	Little Elephant and Elections CF-258/B	1900	LVL 5	brute forcecombinatoricsdp
165	Theseus and labyrinth CF-676/D	2000	LVL 5	graphsimplementationshortest paths
166	Yaroslav and Time CF-301/B	2100	LVL 5	binary searchgraphsshortest paths
167	Rat Kwesh and Cheese CF-621/D	2400	LVL 5	brute forceconstructive algorithmsmath
168	Minesweeper 1D CF-404/D	1900	LVL 5	dpimplementation
169	Beard Graph CF-165/D	2100	LVL 5	data structuresdsutrees
170	Compatible Numbers CF-165/E	2200	LVL 5	bitmasksbrute forcedfs and similar +1
171	Mishka and Interesting sum CF-703/D	2100	LVL 5	data structures
172	Vanya and Triangles CF-552/D	1900	LVL 5	brute forcecombinatoricsdata structures +3
173	Money Transfers CF-675/C	2100	LVL 5	constructive algorithmsdata structuresgreedy +1
174	Queue CF-353/D	2000	LVL 5	constructive algorithmsdp
175	Inna and Pink Pony CF-374/A	2000	LVL 5	greedyimplementation
176	Fox And Jumping CF-510/D	1900	LVL 5	bitmasksbrute forcedp +1
177	Random Task CF-431/D	2100	LVL 5	binary searchbitmaskscombinatorics +2
178	Minimization CF-571/B	2000	LVL 5	dpgreedysortings
179	Modulo Sum CF-577/B	1900	LVL 5	combinatoricsdata structuresdp +1
180	Paths and Trees CF-545/E	2000	LVL 5	graphsgreedyshortest paths
181	Famil Door and Brackets CF-629/C	2000	LVL 5	dpstrings
182	Babaei and Birthday Cake CF-629/D	2000	LVL 5	data structuresdp
183	Wet Shark and Blocks CF-621/E	2000	LVL 5	dpmatrices
184	Empire Strikes Back CF-300/E	2300	LVL 6	binary searchmathnumber theory
185	Vanya and Brackets CF-552/E	2100	LVL 6	brute forcedpexpression parsing +3
186	Game with Powers CF-317/D	2300	LVL 6	dpgames
187	Arthur and Brackets CF-508/E	2200	LVL 6	dpgreedy
188	Anya and Cubes CF-525/E	2100	LVL 6	binary searchbitmasksbrute force +3
189	Devu and Flowers CF-451/E	2300	LVL 6	bitmaskscombinatoricsnumber theory
190	Coin Troubles CF-283/C	2100	LVL 6	dp
191	Thwarting Demonstrations CF-191/E	2200	LVL 6	binary searchdata structurestrees
192	Yet Another Number Game CF-282/D	2100	LVL 6	dpgames
193	Game on Tree CF-280/C	2200	LVL 6	implementationmathprobabilities +1
194	Edges in MST CF-160/D	2300	LVL 6	dfs and similardsugraphs +1
195	Trains and Statistic CF-675/E	2300	LVL 6	data structuresdpgreedy
196	Infinite Inversions CF-540/E	2100	LVL 6	binary searchdata structuresimplementation +2
197	Product Sum CF-631/E	2600	LVL 7	data structuresdpgeometry
198	Axis Walking CF-327/E	2300	LVL 7	bitmaskscombinatoricsconstructive algorithms +2
199	Kefa and Watch CF-580/E	2500	LVL 7	data structureshashingstrings
200	Optimize! CF-338/E	2600	LVL 8	data structures

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