Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round (Div. 2)
7 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
472D	Design Tutorial: Inverse the Problem dfs and similar, dsu, shortest paths, trees	1900	x5404
472C	Design Tutorial: Make It Nondeterministic greedy	1400	x6363
472B	Design Tutorial: Learn from Life	1300	x7416
472A	Design Tutorial: Learn from Math math, number theory	800	x59748
471E	MUH and Lots and Lots of Segments data structures, dsu	2700	x82
471D	MUH and Cube Walls string suffix structures, strings	1800	x8048
471C	MUH and House of Cards binary search, brute force, greedy, math	1700	x3565
471B	MUH and Important Things implementation, sortings	1300	x5947
471A	MUH and Sticks implementation	1100	x13417
470H	Array Sorting *special problem	2300	x188
470G	Hamming Distance *special problem	2300	x95
470F	Pairwise Sums *special problem	2300	x105
470E	Chessboard *special problem	1900	x197
470D	Caesar Cipher *special problem	1900	x152
470C	Eval *special problem	1900	x240
470B	Hexakosioihexekontahexaphobia *special problem	1800	x259
470A	Crystal Ball Sequence *special problem, implementation	1400	x676
469B	Chat Online implementation	1300	x12647
469A	I Wanna Be the Guy greedy, implementation	800	x97323
468E	Permanent dp, graph matchings, math, meet-in-the-middle	3100	x312
468D	Tree graph matchings	3100	x363
468C	Hack it! binary search, constructive algorithms, math	2500	x2401
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x4169
468A	24 Game constructive algorithms, greedy, math	1500	x7980
467E	Alex and Complicated Task data structures, dp, greedy	2300	x783
467D	Fedor and Essay dfs and similar, dp, graphs, hashing, strings	2400	x1833
467C	George and Job dp, implementation	1700	x14645
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x37558
467A	George and Accommodation implementation	800	x121627
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2226
466D	Increase Sequence combinatorics, dp	2100	x3184
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x36072
466B	Wonder Room brute force, math	2000	x4901
466A	Cheap Travel implementation	1200	x63376
465B	Inbox (100500) implementation	1000	x10420
465A	inc ARG implementation	900	x10027
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1468
464D	World of Darkraft - 2 dp, probabilities	2700	x670
464C	Substitutes in Number dp	2100	x1851
464B	Restore Cube brute force, geometry	2000	x1711
464A	No to Palindromes! greedy, strings	1700	x5913
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1599
463D	Gargari and Permutations dfs and similar, dp, graphs, implementation	1900	x6453
463C	Gargari and Bishops greedy, hashing, implementation	1900	x8728
463B	Caisa and Pylons brute force, implementation, math	1100	x27208
463A	Caisa and Sugar brute force, implementation	1200	x9253
462B	Appleman and Card Game greedy	1300	x14446
462A	Appleman and Easy Task brute force, implementation	1000	x16863
461E	Appleman and a Game binary search, shortest paths, strings	3000	x375
461D	Appleman and Complicated Task dsu, math	2800	x364
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1335
461B	Appleman and Tree dfs and similar, dp, trees	2000	x5620
461A	Appleman and Toastman greedy, sortings	1200	x15496
460E	Roland and Rose brute force, geometry, math, sortings	2700	x342
460D	Little Victor and Set brute force, constructive algorithms, math	2300	x998
460C	Present binary search, data structures, greedy	1700	x6231
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12351
460A	Vasya and Socks brute force, implementation, math	900	x45958
459E	Pashmak and Graph dp, sortings	1900	x5408
459D	Pashmak and Parmida's problem data structures, divide and conquer, sortings	1800	x10104
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x6181
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x40265
459A	Pashmak and Garden implementation	1200	x32860
457F	An easy problem about trees dp, games, greedy, trees	3200	x107
457E	Flow Optimality constructive algorithms, flows, math	3000	x96
457D	Bingo! combinatorics, math, probabilities	2700	x279
457C	Elections brute force	2100	x877
457B	Distributed Join greedy	1900	x1135
457A	Golden System math, meet-in-the-middle	1700	x1277
456B	Fedya and Maths math, number theory	1200	x16624
456A	Laptops sortings	1100	x48066
455E	Function data structures	2900	x679
455D	Serega and Fun data structures	2700	x2959
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5715
455B	A Lot of Games dfs and similar, dp, games, implementation, strings, trees	1900	x5970
455A	Boredom dp	1500	x58256
454B	Little Pony and Sort by Shift implementation	1200	x18166
454A	Little Pony and Crystal Mine implementation	800	x14820
453E	Little Pony and Lord Tirek data structures	3100	x721
453D	Little Pony and Elements of Harmony dp, matrices	3000	x470
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1634
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4687
453A	Little Pony and Expected Maximum probabilities	1600	x10470
452F	Permutation data structures, divide and conquer, hashing	2700	x1496
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1063
452D	Washer, Dryer, Folder greedy, implementation	1900	x1502
452C	Magic Trick combinatorics, math, probabilities	2100	x1624
452B	4-point polyline brute force, constructive algorithms, geometry, trees	1800	x1999
452A	Eevee brute force, implementation, strings	1000	x7995
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3606
451D	Count Good Substrings math	2000	x4729
451C	Predict Outcome of the Game brute force, implementation, math	1700	x3363
451B	Sort the Array implementation, sortings	1300	x45306
451A	Game With Sticks implementation	900	x65545
450B	Jzzhu and Sequences implementation, math	1300	x26186
450A	Jzzhu and Children implementation	1000	x34522
449E	Jzzhu and Squares dp, math, number theory	2900	x285
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4427
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2259
449B	Jzzhu and Cities graphs, greedy, shortest paths	2000	x8513