Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round (Div. 1)
6 days

Before contest
Codeforces Round (Div. 2)
6 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
471D	MUH and Cube Walls string suffix structures, strings	1800	x8698
471C	MUH and House of Cards binary search, brute force, greedy, math	1700	x3591
471B	MUH and Important Things implementation, sortings	1300	x5978
471A	MUH and Sticks implementation	1100	x13493
470H	Array Sorting *special problem	2300	x190
470G	Hamming Distance *special problem	2300	x96
470F	Pairwise Sums *special problem	2300	x107
470E	Chessboard *special problem	1900	x200
470D	Caesar Cipher *special problem	1900	x155
470C	Eval *special problem	1900	x258
470B	Hexakosioihexekontahexaphobia *special problem	1800	x263
470A	Crystal Ball Sequence *special problem, implementation	1400	x683
469B	Chat Online implementation	1300	x12876
469A	I Wanna Be the Guy greedy, implementation	800	x103482
468E	Permanent dp, graph matchings, math, meet-in-the-middle	3100	x353
468D	Tree graph matchings	3100	x374
468C	Hack it! binary search, constructive algorithms, math	2500	x2463
468B	Two Sets 2-sat, dfs and similar, dsu, graph matchings, greedy	2000	x4411
468A	24 Game constructive algorithms, greedy, math	1500	x8072
467E	Alex and Complicated Task data structures, dp, greedy	2300	x803
467D	Fedor and Essay dfs and similar, dp, graphs, hashing, strings	2400	x1880
467C	George and Job dp, implementation	1700	x15070
467B	Fedor and New Game bitmasks, brute force, constructive algorithms, implementation	1100	x38836
467A	George and Accommodation implementation	800	x130924
466E	Information Graph dfs and similar, dsu, graphs, trees	2100	x2329
466D	Increase Sequence combinatorics, dp	2100	x3325
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x37476
466B	Wonder Room brute force, math	2000	x4994
466A	Cheap Travel implementation	1200	x66624
465B	Inbox (100500) implementation	1000	x10520
465A	inc ARG implementation	900	x10140
464E	The Classic Problem data structures, graphs, shortest paths	3000	x1560
464D	World of Darkraft - 2 dp, probabilities	2700	x679
464C	Substitutes in Number dp	2100	x1867
464B	Restore Cube brute force, geometry	2000	x1724
464A	No to Palindromes! greedy, strings	1700	x5971
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1635
463D	Gargari and Permutations dfs and similar, dp, graphs, implementation	1900	x6686
463C	Gargari and Bishops greedy, hashing, implementation	1900	x8832
463B	Caisa and Pylons brute force, implementation, math	1100	x28085
463A	Caisa and Sugar brute force, implementation	1200	x9326
462B	Appleman and Card Game greedy	1300	x14778
462A	Appleman and Easy Task brute force, implementation	1000	x17100
461E	Appleman and a Game binary search, shortest paths, strings	3000	x459
461D	Appleman and Complicated Task dsu, math	2800	x379
461C	Appleman and a Sheet of Paper data structures, implementation	2200	x1340
461B	Appleman and Tree dfs and similar, dp, trees	2000	x5969
461A	Appleman and Toastman greedy, sortings	1200	x15665
460E	Roland and Rose brute force, geometry, math, sortings	2700	x345
460D	Little Victor and Set brute force, constructive algorithms, math	2300	x1013
460C	Present binary search, data structures, greedy	1700	x6354
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12634
460A	Vasya and Socks brute force, implementation, math	900	x47623
459E	Pashmak and Graph dp, sortings	1900	x5604
459D	Pashmak and Parmida's problem data structures, divide and conquer, sortings	1800	x10599
459C	Pashmak and Buses combinatorics, constructive algorithms, math	1900	x6236
459B	Pashmak and Flowers combinatorics, implementation, sortings	1300	x41925
459A	Pashmak and Garden implementation	1200	x33847
457F	An easy problem about trees dp, games, greedy, trees	3200	x110
457E	Flow Optimality constructive algorithms, flows, math	3000	x99
457D	Bingo! combinatorics, math, probabilities	2700	x283
457C	Elections brute force	2100	x907
457B	Distributed Join greedy	1900	x1154
457A	Golden System math, meet-in-the-middle	1700	x1288
456B	Fedya and Maths math, number theory	1200	x17194
456A	Laptops sortings	1100	x50296
455E	Function data structures	2900	x707
455D	Serega and Fun data structures	2700	x3117
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x5907
455B	A Lot of Games dfs and similar, dp, games, implementation, strings, trees	1900	x6131
455A	Boredom dp	1500	x61764
454B	Little Pony and Sort by Shift implementation	1200	x18387
454A	Little Pony and Crystal Mine implementation	800	x15091
453E	Little Pony and Lord Tirek data structures	3100	x768
453D	Little Pony and Elements of Harmony dp, matrices	3000	x482
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1672
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x4844
453A	Little Pony and Expected Maximum probabilities	1600	x10996
452F	Permutation data structures, divide and conquer, hashing	2700	x1599
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1082
452D	Washer, Dryer, Folder greedy, implementation	1900	x1532
452C	Magic Trick combinatorics, math, probabilities	2100	x1662
452B	4-point polyline brute force, constructive algorithms, geometry, trees	1800	x2029
452A	Eevee brute force, implementation, strings	1000	x8108
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3851
451D	Count Good Substrings math	2000	x4835
451C	Predict Outcome of the Game brute force, implementation, math	1700	x3416
451B	Sort the Array implementation, sortings	1300	x47344
451A	Game With Sticks implementation	900	x68175
450B	Jzzhu and Sequences implementation, math	1300	x26985
450A	Jzzhu and Children implementation	1000	x36661
449E	Jzzhu and Squares dp, math, number theory	2900	x291
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x4755
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2329
449B	Jzzhu and Cities graphs, greedy, shortest paths	2000	x9007
449A	Jzzhu and Chocolate greedy, math	1700	x3965
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1561
448D	Multiplication Table binary search, brute force	1800	x14702
448C	Painting Fence divide and conquer, dp, greedy	1900	x8486
448B	Suffix Structures implementation, strings	1400	x16352