Problemset - Codeforces

Please read the new rule regarding the restriction on the use of AI tools. ×

→ Pay attention

Before contest
Kotlin Heroes: Episode 11
05:12:03
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
804B	Minimum number of steps combinatorics, greedy, implementation, math	1400	x9634
803A	Maximal Binary Matrix constructive algorithms	1400	x4846
802J	Send the Fool Further! (easy) dfs and similar, graphs, trees	1400	x4595
802B	Heidi and Library (medium) data structures, greedy	1800	x1119
802A	Heidi and Library (easy) greedy	1800	x1368
799C	Fountains binary search, data structures, implementation	1800	x3764
799B	T-shirt buying data structures, implementation	1400	x8773
798C	Mike and gcd problem dp, greedy, number theory	1700	x5797
797C	Minimal string data structures, greedy, strings	1700	x6711
797B	Odd sum dp, greedy, implementation	1400	x10517
794C	Naming Company games, greedy, sortings	1800	x3110
793B	Igor and his way to work dfs and similar, graphs, implementation, shortest paths	1600	x4431
789B	Masha and geometric depression brute force, implementation, math	1700	x4379
788A	Functions again dp, two pointers	1600	x9090
785C	Anton and Fairy Tale binary search, math	1600	x7351
784C	INTERCALC *special problem, implementation	1800	x726
784A	Numbers Joke *special problem	1700	x3179
780C	Andryusha and Colored Balloons dfs and similar, graphs, greedy, trees	1600	x9088
780B	The Meeting Place Cannot Be Changed binary search	1600	x9593
778B	Bitwise Formula bitmasks, brute force, dfs and similar, expression parsing, implementation	1800	x2312
778A	String Game binary search, greedy, strings	1700	x11535
777D	Cloud of Hashtags binary search, greedy, implementation, strings	1800	x4984
777C	Alyona and Spreadsheet binary search, data structures, dp, greedy, implementation, two pointers	1600	x6365
776C	Molly's Chemicals binary search, brute force, data structures, implementation, math	1800	x5903
774K	Stepan and Vowels *special problem, implementation, strings	1600	x1273
774D	Lie or Truth *special problem, constructive algorithms, implementation, sortings	1500	x1945
773A	Success Rate binary search, math	1700	x4442
772B	Volatile Kite geometry	1800	x3305
772A	Voltage Keepsake binary search, math	1800	x4350
771B	Bear and Different Names constructive algorithms, greedy	1500	x6895
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x15240
770D	Draw Brackets! *special problem, implementation	1400	x1577
770C	Online Courses In BSU *special problem, dfs and similar, graphs, implementation	1500	x2622
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2327
769C	Cycle In Maze *special problem, dfs and similar, graphs, greedy, shortest paths	1700	x2269
768C	Jon Snow and his Favourite Number brute force, dp, implementation, sortings	1800	x3799
768B	Code For 1 constructive algorithms, dfs and similar, divide and conquer	1600	x5970
766C	Mahmoud and a Message brute force, dp, greedy, strings	1700	x4389
765D	Artsem and Saunders constructive algorithms, dsu, math	1700	x2474
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x10528
762B	USB vs. PS/2 greedy, implementation, sortings, two pointers	1400	x8042
762A	k-th divisor math, number theory	1400	x19621
761D	Dasha and Very Difficult Problem binary search, brute force, constructive algorithms, greedy, sortings	1700	x4045
761C	Dasha and Password brute force, dp, implementation	1500	x5872
760B	Frodo and pillows binary search, greedy	1500	x6509
758C	Unfair Poll binary search, constructive algorithms, implementation, math	1700	x3871
757B	Bash's Big Day greedy, math, number theory	1400	x10216
756B	Travel Card binary search, dp	1600	x3470
756A	Pavel and barbecue constructive algorithms, dfs and similar	1700	x3028
753B	Interactive Bulls and Cows (Easy) brute force, constructive algorithms, implementation	1600	x1198
750C	New Year and Rating binary search, greedy, math	1600	x6556
749C	Voting greedy, implementation, two pointers	1500	x5969
748C	Santa Claus and Robot constructive algorithms, math	1400	x4612
748B	Santa Claus and Keyboard Check implementation, strings	1500	x5356
747E	Comments dfs and similar, expression parsing, implementation, strings	1700	x1966
747D	Winter Is Coming dp, greedy, sortings	1800	x3248
746D	Green and Black Tea constructive algorithms, greedy, math	1500	x5095
746C	Tram constructive algorithms, implementation, math	1600	x3712
745B	Hongcow Solves A Puzzle implementation	1400	x3741
744A	Hongcow Builds A Nation dfs and similar, graphs	1500	x8334
743D	Chloe and pleasant prizes dfs and similar, dp, graphs, trees	1800	x4306
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x12260
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9250
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5231
741A	Arpa's loud Owf and Mehrdad's evil plan dfs and similar, math	1600	x5428
739A	Alyona and mex constructive algorithms, greedy	1700	x7835
735D	Taxes math, number theory	1600	x13403
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7508
734D	Anton and Chess implementation	1700	x3726
734C	Anton and Making Potions binary search, dp, greedy, two pointers	1600	x5329
733D	Kostya the Sculptor data structures, hashing	1600	x4171
733C	Epidemic in Monstropolis constructive algorithms, dp, greedy, two pointers	1800	x3343
732D	Exams binary search, greedy, sortings	1700	x5502
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x6925
730G	Car Repair Shop implementation	1600	x2150
730B	Minimum and Maximum constructive algorithms, interactive	1800	x2451
730A	Toda 2 greedy, implementation	1800	x1571
729D	Sea Battle constructive algorithms, greedy, math	1700	x3726
729C	Road to Cinema binary search, greedy, sortings	1700	x3915
727D	T-shirts Distribution constructive algorithms, flows, greedy	1800	x1857
727C	Guess the Array constructive algorithms, interactive, math	1400	x7363
727B	Bill Total Value expression parsing, implementation, strings	1600	x1993
725D	Contest Balloons data structures, greedy	1800	x2802
725C	Hidden Word brute force, constructive algorithms, implementation, strings	1600	x2641
724C	Ray Tracing greedy, hashing, implementation, math, number theory, sortings	1800	x2139
724B	Batch Sort brute force, greedy, implementation, math	1500	x4012
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x6949
723C	Polycarp at the Radio greedy	1600	x4623
722C	Destroying Array data structures, dsu	1600	x9309
721C	Journey dp, graphs	1800	x5858
719B	Anatoly and Cockroaches greedy	1400	x8479
718A	Efim and Strange Grade dp, implementation, math	1700	x4399
715A	Plus and Square Root constructive algorithms, math	1600	x5609
713A	Sonya and Queries data structures, implementation	1400	x8461
712C	Memory and De-Evolution greedy, math	1600	x5777
711C	Coloring Trees dp	1700	x8111
711B	Chris and Magic Square constructive algorithms, implementation	1400	x8416
710C	Magic Odd Square constructive algorithms, math	1500	x5097
710B	Optimal Point on a Line brute force, sortings	1400	x8743
709B	Checkpoints greedy, implementation, sortings	1500	x4731