Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
35:07:58
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1425D	Danger of Mad Snakes combinatorics, dp, math	2300	x801
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x801
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x800
983C	Elevator dp, graphs, shortest paths	2400	x800
141E	Clearing Up constructive algorithms, dp, dsu, graphs	2300	x799
1182D	Complete Mirror constructive algorithms, dfs and similar, dp, hashing, implementation, trees	2400	x798
722E	Research Rover combinatorics, dp	2900	x797
1453F	Even Harder dp	2700	x795
1063F	String Journey data structures, dp, string suffix structures	3300	x795
601E	A Museum Robbery data structures, dp	2800	x795
1338D	Nested Rubber Bands constructive algorithms, dfs and similar, dp, math, trees	2700	x794
830D	Singer House combinatorics, dp, graphs, trees	2800	x793
627D	Preorder Test binary search, dfs and similar, dp, graphs, greedy, trees	2600	x793
385D	Bear and Floodlight bitmasks, dp, geometry	2200	x793
1146G	Zoning Restrictions dp, flows, graphs	2700	x789
1809E	Two Tanks binary search, dp, implementation, math	2400	x787
578D	LCS Again dp, greedy	2700	x775
1768F	Wonderful Jump dp, greedy	2900	x772
1648D	Serious Business data structures, divide and conquer, dp, implementation, shortest paths	2800	x771
1616H	Keep XOR Low bitmasks, combinatorics, data structures, divide and conquer, dp, math	3000	x771
1016F	Road Projects dfs and similar, dp, trees	2600	x771
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x770
1693D	Decinc Dividing brute force, data structures, divide and conquer, dp, greedy	2800	x768
1823F	Random Walk dp, graphs, math, probabilities, trees	2600	x765
1400F	x-prime Substrings brute force, dfs and similar, dp, string suffix structures, strings	2800	x765
1734F	Zeros and Ones bitmasks, divide and conquer, dp, math	2500	x764
1799F	Halve or Subtract binary search, brute force, dp, greedy, sortings	2700	x760
727F	Polycarp's problems binary search, dp, greedy	2300	x760
467E	Alex and Complicated Task data structures, dp, greedy	2300	x759
261C	Maxim and Matrix constructive algorithms, dp, math	2000	x759
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x757
1740F	Conditional Mix combinatorics, dp, math	2600	x756
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x754
1380F	Strange Addition data structures, dp, matrices	2600	x752
1580D	Subsequence brute force, divide and conquer, dp, greedy, trees	2900	x750
809D	Hitchhiking in the Baltic States data structures, dp	2900	x750
413D	2048 bitmasks, dp	2000	x749
1153F	Serval and Bonus Problem combinatorics, dp, math, probabilities	2600	x748
1383E	Strange Operation combinatorics, data structures, dp	2800	x745
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x744
1312G	Autocompletion data structures, dfs and similar, dp	2600	x744
1179D	Fedor Runs for President data structures, dp, trees	2700	x744
435D	Special Grid brute force, dp, greedy	2000	x744
913E	Logical Expression bitmasks, dp, shortest paths	2400	x741
888F	Connecting Vertices dp, graphs	2500	x740
1924D	Balanced Subsequences combinatorics, dp, math	2700	x739
822E	Liar binary search, dp, hashing, string suffix structures	2400	x738
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x735
542F	Quest dp, greedy	2100	x733
908E	New Year and Entity Enumeration bitmasks, combinatorics, dp, math	2500	x732
300D	Painting Square dp, fft	2300	x730
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x729
1615F	LEGOndary Grandmaster combinatorics, dp, math	2800	x728
1423J	Bubble Cup hypothesis bitmasks, constructive algorithms, dp, math	2400	x728
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x727
1919F2	Wine Factory (Hard Version) data structures, dp, flows, greedy, matrices	2800	x726
1422E	Minlexes dp, greedy, implementation, strings	2700	x726
809C	Find a car combinatorics, divide and conquer, dp	2600	x724
1172C2	Nauuo and Pictures (hard version) dp, probabilities	2600	x721
1107F	Vasya and Endless Credits dp, flows, graph matchings, graphs, sortings	2600	x716
1946F	Nobody is needed 2-sat, data structures, dfs and similar, dp	2500	x713
63E	Sweets Game bitmasks, dfs and similar, dp, games, implementation	2000	x713
111D	Petya and Coloring combinatorics, dp	2300	x712
386C	Diverse Substrings dp, strings, two pointers	2000	x710
1250G	Discarding Game dp, greedy, two pointers	2300	x707
1055E	Segments on the Line binary search, dp	2500	x706
536D	Tavas in Kansas dp, games	2900	x705
1185G2	Playlist for Polycarp (hard version) combinatorics, dp	2600	x702
1626F	A Random Code Problem combinatorics, dp, math, number theory, probabilities	2800	x699
1903D2	Maximum And Queries (hard version) bitmasks, divide and conquer, dp, greedy	2500	x696
1681E	Labyrinth Adventures data structures, dp, matrices, shortest paths	2600	x696
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x695
1821F	Timber combinatorics, dp, fft, math	2600	x694
500F	New Year Shopping divide and conquer, dp	2700	x693
1799G	Count Voting combinatorics, dp, math	2600	x692
1322D	Reality Show bitmasks, dp	2800	x690
123E	Maze dfs and similar, dp, probabilities, trees	2500	x688
437E	The Child and Polygon dp, geometry	2500	x687
7E	Defining Macros dp, expression parsing, implementation	2600	x686
1796E	Colored Subgraphs dfs and similar, dp, games, greedy, trees	2500	x683
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x682
920D	Tanks dp, greedy, implementation	2400	x682
1252J	Tiling Terrace brute force, dp	2300	x680
279D	The Minimum Number of Variables bitmasks, dp	2200	x680
66E	Petya and Post data structures, dp	2000	x680
86C	Genetic engineering dp, string suffix structures, trees	2500	x679
1070J	Streets and Avenues in Berhattan dp	2300	x678
506E	Mr. Kitayuta's Gift combinatorics, dp, matrices, strings	3000	x678
346D	Robot Control dp, graphs, shortest paths	2600	x678
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x673
596D	Wilbur and Trees dp, math, probabilities, sortings	2300	x672
232E	Quick Tortoise bitmasks, divide and conquer, dp	3000	x671
1387A	Graph *special problem, binary search, dfs and similar, dp, math, ternary search	2100	x669
101D	Castle dp, greedy, probabilities, sortings, trees	2300	x669
1421E	Swedish Heroes brute force, dp, implementation	2700	x668
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x667
71E	Nuclear Fusion bitmasks, dp	2200	x667
1392H	ZS Shuffles Cards combinatorics, dp, math, probabilities	3000	x666
1866I	Imagination Castle dp, games, two pointers	2300	x665
8E	Beads dp, graphs	2600	x664