Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round (Div. 2)
6 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
875E	Delivery Club binary search, data structures, dp	2600	x908
875D	High Cry binary search, bitmasks, combinatorics, data structures, divide and conquer	2200	x2245
875C	National Property 2-sat, dfs and similar, graphs, implementation	2100	x2124
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x5189
875A	Classroom Watch brute force, math	1200	x9585
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x1394
873E	Awards For Contestants brute force, data structures, dp	2300	x694
873D	Merge Sort constructive algorithms, divide and conquer	1800	x3142
873C	Strange Game On Matrix greedy, two pointers	1600	x3265
873B	Balanced Substring dp, implementation	1500	x7781
873A	Chores implementation	800	x8227
871E	Restore the Tree graphs, greedy, trees	2900	x148
870F	Paths data structures, number theory	2700	x614
870E	Points, Lines and Ready-made Titles dfs and similar, dsu, graphs, trees	2300	x1232
870D	Something with XOR Queries brute force, interactive, probabilities	2000	x1219
870C	Maximum splitting dp, greedy, math, number theory	1300	x9104
870B	Maximum of Maximums of Minimums greedy	1200	x9491
870A	Search for Pretty Integers brute force, implementation	900	x10143
869E	The Untended Antiquity data structures, hashing	2400	x1753
869D	The Overdosing Ubiquity brute force, dfs and similar, graphs	2800	x250
869C	The Intriguing Obsession combinatorics, dp, math	1800	x4701
869B	The Eternal Immortality math	1100	x13597
869A	The Artful Expedient brute force, implementation	1100	x9459
868G	El Toll Caves math	3300	x132
868F	Yet Another Minimization Problem divide and conquer, dp	2500	x3767
868E	Policeman and a Tree dp, graphs, trees	2700	x491
868D	Huge Strings bitmasks, brute force, dp, implementation, strings	2200	x909
868C	Qualification Rounds bitmasks, brute force, constructive algorithms, dp	1500	x4617
868B	Race Against Time implementation	1400	x3678
868A	Bark to Unlock brute force, implementation, strings	900	x8684
867A	Between the Offices implementation	800	x19254
865G	Flowers and Chocolate combinatorics, math, matrices	3300	x135
865F	Egg Roulette bitmasks, brute force, divide and conquer, math, meet-in-the-middle	3300	x68
865E	Hex Dyslexia bitmasks, brute force, dp, graphs	3300	x127
865D	Buy Low Sell High constructive algorithms, data structures, greedy	2400	x5531
865C	Gotta Go Fast binary search, dp	2400	x838
865B	Ordering Pizza binary search, sortings, ternary search	1900	x1841
865A	Save the problem! constructive algorithms	1400	x4329
864F	Cities Excursions dfs and similar, graphs, trees	2700	x619
864E	Fire dp, sortings	2000	x4239
864D	Make a Permutation! greedy, implementation, math	1500	x5999
864C	Bus greedy, implementation, math	1500	x5855
864B	Polycarp and Letters brute force, implementation, strings	1000	x9111
864A	Fair Game implementation, sortings	1000	x11647
863G	Graphic Settings	3200	x55
863F	Almost Permutation flows	2200	x1245
863E	Turn Off The TV data structures, sortings	2000	x3104
863D	Yet Another Array Queries Problem data structures, implementation	1800	x3250
863C	1-2-3 graphs, implementation	1800	x2496
863B	Kayaking brute force, greedy, sortings	1500	x8245
863A	Quasi-palindrome brute force, implementation	900	x10179
862F	Mahmoud and Ehab and the final stage data structures, strings	2900	x209
862E	Mahmoud and Ehab and the function binary search, data structures, sortings	2100	x1654
862D	Mahmoud and Ehab and the binary string binary search, divide and conquer, interactive	2000	x1880
862C	Mahmoud and Ehab and the xor constructive algorithms	1900	x4075
862B	Mahmoud and Ehab and the bipartiteness dfs and similar, graphs, trees	1300	x17586
862A	Mahmoud and Ehab and the MEX greedy, implementation	1000	x9509
860E	Arkady and a Nobody-men data structures, dfs and similar, trees	2700	x434
859G	Circle of Numbers math	3000	x157
859F	Ordering T-Shirts greedy	2800	x182
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1855
859D	Third Month Insanity dp, probabilities, trees	2100	x1051
859C	Pie Rules dp, games	1500	x5394
859B	Lazy Security Guard brute force, geometry, math	1000	x7045
859A	Declined Finalists greedy, implementation	800	x7722
858F	Wizard's Tour constructive algorithms, dfs and similar, graphs	2300	x1572
858E	Tests Renumeration greedy, implementation	2200	x509
858D	Polycarp's phone book data structures, implementation, sortings	1600	x3838
858C	Did you mean... dp, greedy, implementation	1500	x5623
858B	Which floor? brute force, implementation	1500	x3733
858A	k-rounding brute force, math, number theory	1100	x8011
856F	To Play or not to Play greedy	3000	x104
856E	Satellites	3100	x71
856D	Masha and Cactus dp, trees	2400	x401
856C	Eleventh Birthday combinatorics, dp, math	2400	x573
856B	Similar Words dp, hashing, strings, trees	2300	x499
856A	Set Theory brute force, constructive algorithms	1600	x1431
855G	Harry Vs Voldemort dfs and similar, dp, graphs, trees	3300	x208
855F	Nagini binary search, data structures	3100	x450
855E	Salazar Slytherin's Locket bitmasks, dp	2200	x1776
855D	Rowena Ravenclaw's Diadem trees	2500	x527
855C	Helga Hufflepuff's Cup dp, trees	2000	x2065
855B	Marvolo Gaunt's Ring brute force, data structures, dp	1500	x8647
855A	Tom Riddle's Diary brute force, implementation, strings	800	x21556
854B	Maxim Buys an Apartment constructive algorithms, math	1200	x8192
854A	Fraction brute force, constructive algorithms, math	800	x13608
853E	Lada Malina data structures, geometry	3400	x65
853D	Michael and Charging Stations binary search, dp, greedy	2400	x667
853C	Boredom data structures	2100	x1481
853B	Jury Meeting greedy, sortings, two pointers	1800	x2522
853A	Planning greedy	1500	x5842
852I	Dating brute force, dfs and similar, graphs, trees	2300	x576
852H	Bob and stages dp, geometry	3000	x152
852G	Bathroom terminal implementation	1700	x1287
852F	Product transformation combinatorics, math, number theory	2200	x570
852E	Casinos and travel dp	2100	x1052
852D	Exploration plan binary search, flows, graph matchings, shortest paths	2100	x989
852C	Property greedy, sortings	2100	x582
852B	Neural Network country dp, matrices	2000	x1447
852A	Digits brute force, implementation, math	2500	x389