Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 986 (Div. 2)
07:31:09
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
696B	Puzzles dfs and similar, math, probabilities, trees	1700	x3508
691D	Swaps in Permutation dfs and similar, dsu, math	1700	x5551
689C	Mike and Chocolate Thieves binary search, combinatorics, math	1700	x5383
688B	Lovely Palindromes constructive algorithms, math	1000	x32348
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x5932
685C	Optimal Point binary search, math	2900	x584
685A	Robbers' watch brute force, combinatorics, dp, math	1700	x4235
683D	Chocolate Bar *special problem, math	1400	x323
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x21806
679D	Bear and Chase brute force, dfs and similar, graphs, implementation, math, probabilities	2900	x318
679A	Bear and Prime 100 constructive algorithms, interactive, math	1400	x13093
678E	Another Sith Tournament bitmasks, dp, math, probabilities	2200	x2214
678D	Iterated Linear Function math, number theory	1700	x4558
678C	Joty and Chocolate implementation, math, number theory	1600	x9502
678A	Johny Likes Numbers implementation, math	800	x13346
677B	Vanya and Food Processor implementation, math	1400	x7662
676E	The Last Fight Between Human and AI math	2400	x895
676B	Pyramid of Glasses implementation, math, math	1500	x5515
675B	Restoring Painting brute force, constructive algorithms, math	1400	x7405
675A	Infinite Sequence math	1100	x14987
670A	Holidays brute force, constructive algorithms, greedy, math	900	x17046
669A	Little Artem and Presents math	800	x10849
667A	Pouring Rain geometry, math	1100	x8049
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x618
664A	Complicated GCD math, number theory	800	x18369
663A	Rebus constructive algorithms, expression parsing, greedy, math	1800	x3303
662D	International Olympiad constructive algorithms, greedy, implementation, math	2000	x1635
662C	Binary Table bitmasks, brute force, divide and conquer, dp, fft, math	2600	x2028
662A	Gambling Nim bitmasks, math, matrices, probabilities	2400	x480
660E	Different Subsets For All Tuples combinatorics, math	2300	x1518
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8969
659D	Bicycle Race geometry, implementation, math	1500	x6338
659A	Round House implementation, math	1000	x15856
653G	Move by Prime combinatorics, math, number theory	3100	x555
652F	Ants on a Circle constructive algorithms, math	2800	x554
652A	Gabriel and Caterpillar implementation, math	1400	x4772
651A	Joysticks dp, greedy, implementation, math	1100	x23009
650A	Watchmen data structures, geometry, math	1400	x15562
645F	Cowslip Collections combinatorics, math, number theory	2500	x794
645B	Mischievous Mess Makers greedy, math	1200	x3406
643F	Bears and Juice dp, math, meet-in-the-middle	2900	x715
643E	Bear and Destroying Subtrees dp, math, probabilities, trees	2700	x640
641D	Little Artem and Random Variable dp, implementation, math, probabilities	2400	x1245
639E	Bear and Paradox binary search, greedy, math, sortings	2800	x583
639C	Bear and Polynomials hashing, implementation, math	2200	x1205
638A	Home Numbers *special problem, constructive algorithms, math	1100	x4043
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x781
633D	Fibonacci-ish brute force, dp, hashing, implementation, math	2000	x2810
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6705
633A	Ebony and Ivory brute force, math, number theory	1100	x12843
632E	Thief in a Shop divide and conquer, dp, fft, math	2400	x2822
632D	Longest Subsequence brute force, math, number theory	2100	x3800
630R	Game games, math	1200	x8696
630Q	Pyramids geometry, math	1700	x1282
630N	Forecast math	1300	x4735
630M	Turn geometry, math	1800	x1183
630L	Cracking the Code implementation, math	1400	x3606
630K	Indivisibility math, number theory	1500	x5362
630J	Divisibility math, number theory	1100	x11175
630I	Parking Lot combinatorics, math	1700	x6842
630H	Benches combinatorics, math	1400	x5023
630G	Challenge Pennants combinatorics, math	1600	x2781
630F	Selection of Personnel combinatorics, math	1300	x6947
630E	A rectangle math	1900	x2337
630D	Hexagons! math	1100	x11069
630C	Lucky Numbers combinatorics, math	1100	x22253
630B	Moore's Law math	1200	x7451
628A	Tennis Tournament implementation, math	1000	x6403
627A	XOR Equation dp, math	1700	x4241
626G	Raffles data structures, dp, greedy, math	3100	x531
626E	Simple Skewness binary search, math, ternary search	2400	x1339
626C	Block Towers brute force, greedy, math, number theory	1600	x4351
626B	Cards constructive algorithms, dp, math	1300	x6626
625D	Finals in arithmetic constructive algorithms, implementation, math	2400	x633
625A	Guest From the Past implementation, math	1700	x5422
624A	Save Luke math	800	x10358
623E	Transforming Sequence combinatorics, dp, fft, math	3300	x550
623D	Birthday greedy, math, probabilities	2700	x499
622F	The Sum of the k-th Powers math	2600	x3888
622A	Infinite Sequence implementation, math	1000	x9399
621D	Rat Kwesh and Cheese brute force, constructive algorithms, math	2400	x996
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x5553
620A	Professor GukiZ's Robot implementation, math	800	x13257
618G	Combining Slimes dp, math, matrices, probabilities	3300	x241
617A	Elephant math	800	x188642
616E	Sum of Remainders implementation, math, number theory	2200	x2955
615E	Hexagons binary search, implementation, math	2100	x980
615D	Multipliers math, number theory	2000	x3935
614B	Gena's Code implementation, math	1400	x6921
613C	Necklace constructive algorithms, math	2500	x1013
612E	Square Root of Permutation combinatorics, constructive algorithms, dfs and similar, graphs, math	2200	x1710
612C	Replace To Make Regular Bracket Sequence data structures, expression parsing, math	1400	x8152
612B	HDD is Outdated Technology implementation, math	1200	x7115
610A	Pasha and Stick combinatorics, math	1000	x23461
609C	Load Balancing implementation, math	1500	x6656
608A	Saitama Destroys Hotel implementation, math	1000	x9365
603E	Pastoral Oddities data structures, divide and conquer, dsu, math, trees	3000	x1243
603D	Ruminations on Ruminants geometry, math	2900	x340
603C	Lieges of Legendre games, math	2200	x1889
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2584