Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round 977 (Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
682B	Alyona and Mex sortings	1200	x11371
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x21643
681B	Economy Game brute force	1300	x8926
675A	Infinite Sequence math	1100	x14932
673B	Problems for Round greedy, implementation	1300	x3522
670C	Cinema implementation, sortings	1300	x9123
667B	Coat of Anticubism constructive algorithms, geometry	1100	x5616
667A	Pouring Rain geometry, math	1100	x8020
665C	Simple Strings dp, greedy, strings	1300	x10288
661A	Lazy Caterer Sequence *special problem	1300	x637
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8890
659C	Tanya and Toys greedy, implementation	1200	x11479
659B	Qualifying Contest constructive algorithms, sortings	1300	x6266
653B	Bear and Compressing brute force, dfs and similar, dp, strings	1300	x4967
651B	Beautiful Paintings greedy, sortings	1200	x11555
651A	Joysticks dp, greedy, implementation, math	1100	x22911
648C	Путь Робота constructive algorithms, dfs and similar, graphs	1100	x945
645B	Mischievous Mess Makers greedy, math	1200	x3400
645A	Amity Assessment brute force, constructive algorithms, implementation	1200	x3445
639A	Bear and Displayed Friends implementation	1200	x6149
638A	Home Numbers *special problem, constructive algorithms, math	1100	x3863
637B	Chat Order *special problem, binary search, constructive algorithms, data structures, sortings	1200	x16373
635A	Orchestra brute force, implementation	1100	x2888
634A	Island Puzzle constructive algorithms, implementation	1300	x3309
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6664
633A	Ebony and Ivory brute force, math, number theory	1100	x12708
632A	Grandma Laura and Apples	1200	x4585
631B	Print Check constructive algorithms, implementation	1200	x7377
630R	Game games, math	1200	x8618
630N	Forecast math	1300	x4655
630J	Divisibility math, number theory	1100	x11062
630F	Selection of Personnel combinatorics, math	1300	x6803
630D	Hexagons! math	1100	x10849
630C	Lucky Numbers combinatorics, math	1100	x21839
630B	Moore's Law math	1200	x7380
629B	Far Relative’s Problem brute force	1100	x8043
628C	Bear and String Distance greedy, strings	1300	x5838
628B	New Skateboard dp	1300	x10766
626B	Cards constructive algorithms, dp, math	1300	x6602
625C	K-special Tables constructive algorithms, implementation	1300	x6820
625B	War of the Corporations constructive algorithms, greedy, strings	1200	x10385
624B	Making a String greedy, sortings	1100	x7978
621B	Wet Shark and Bishops combinatorics, implementation	1300	x10974
618B	Guess the Permutation constructive algorithms	1100	x7971
617B	Chocolate combinatorics	1300	x17866
612B	HDD is Outdated Technology implementation, math	1200	x7022
612A	The Text Splitting brute force, implementation, strings	1300	x7212
611B	New Year and Old Property bitmasks, brute force, implementation	1300	x10070
610B	Vika and Squares constructive algorithms, implementation	1300	x7254
609B	The Best Gift constructive algorithms, implementation	1100	x9040
606A	Magic Spheres implementation	1200	x7971
602A	Two Bases brute force, implementation	1100	x8478
600B	Queries about less or equal elements binary search, data structures, sortings, two pointers	1300	x29688
598B	Queries on a String implementation, strings	1300	x10921
596B	Wilbur and Array greedy, implementation	1100	x10327
596A	Wilbur and Swimming Pool geometry, implementation	1100	x7709
593A	2Char brute force, implementation	1200	x5778
592B	The Monster and the Squirrel math	1100	x8618
592A	PawnChess implementation	1200	x6341
591B	Rebranding implementation, strings	1200	x8233
588B	Duff in Love math	1300	x14081
586B	Laurenty and Shop implementation	1300	x5145
583B	Robot's Task greedy, implementation	1200	x8724
581B	Luxurious Houses implementation, math	1100	x13065
579B	Finding Team Member brute force, implementation, sortings	1300	x5252
574A	Bear and Elections greedy, implementation	1200	x9081
573A	Bear and Poker implementation, math, number theory	1300	x16554
572B	Order Book data structures, greedy, implementation, sortings	1300	x6942
570B	Simple Game constructive algorithms, games, greedy, implementation, math	1300	x16110
570A	Elections implementation	1100	x13887
569B	Inventory greedy, math	1200	x7093
567B	Berland National Library implementation	1300	x8431
560B	Gerald is into Art constructive algorithms, implementation	1200	x7918
558B	Amr and The Large Array implementation	1300	x7841
558A	Lala Land and Apple Trees brute force, implementation, sortings	1100	x10336
557A	Ilya and Diplomas greedy, implementation, math	1100	x8259
556B	Case of Fake Numbers brute force, implementation	1100	x7927
554B	Ohana Cleans Up brute force, greedy, strings	1200	x9934
552B	Vanya and Books implementation, math	1200	x15403
548A	Mike and Fax brute force, implementation, strings	1100	x9993
546B	Soldier and Badges brute force, greedy, implementation, sortings	1200	x17527
545D	Queue greedy, implementation, sortings	1300	x25011
545B	Equidistant String greedy	1100	x11607
544A	Set of Strings implementation, strings	1100	x8213
535B	Tavas and SaDDas bitmasks, brute force, combinatorics, implementation	1100	x22436
534A	Exam constructive algorithms, implementation, math	1100	x12274
527A	Playing with Paper implementation, math	1100	x14426
526A	King of Thieves brute force, implementation	1300	x4763
525A	Vitaliy and Pie greedy, hashing, strings	1100	x14532
523A	Rotate, Flip and Zoom *special problem, implementation	1200	x2631
522B	Photo to Remember *special problem, data structures, dp, implementation	1100	x8853
522A	Reposts *special problem, dfs and similar, dp, graphs, trees	1200	x16275
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19704
519B	A and B and Compilation Errors data structures, implementation, sortings	1100	x39118
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7443
514A	Chewbaсca and Number greedy, implementation	1200	x51938
509B	Painting Pebbles constructive algorithms, greedy, implementation	1300	x9620
508B	Anton and currency you all know greedy, math, strings	1300	x22585
508A	Pasha and Pixels brute force	1100	x7902
505A	Mr. Kitayuta's Gift brute force, implementation, strings	1100	x6671