Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 1002 (Div. 2)
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1859B	Olya and Game with Arrays constructive algorithms, greedy, math, sortings	1000	x29345
1859A	United We Stand constructive algorithms, math, number theory	800	x35088
1858E2	Rollbacks (Hard Version) data structures, interactive, trees	2600	x1096
1858E1	Rollbacks (Easy Version) brute force, data structures, dfs and similar, trees	2500	x1366
1858D	Trees and Segments brute force, data structures, dp, greedy, two pointers	2200	x2903
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x23697
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x11703
1858A	Buttons games, greedy, math	800	x41956
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4673
1857F	Sum and Product binary search, data structures, math	1600	x12249
1857E	Power of Points math, sortings	1500	x13025
1857D	Strong Vertices math, sortings, trees	1300	x20951
1857C	Assembly via Minimums greedy, sortings	1200	x28254
1857B	Maximum Rounding greedy, implementation, math	1100	x23430
1857A	Array Coloring greedy, math	800	x51955
1856E2	PermuTree (hard version) bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees	2700	x1469
1856E1	PermuTree (easy version) dfs and similar, dp, trees	1800	x5565
1856D	More Wrong divide and conquer, interactive	2100	x3354
1856C	To Become Max binary search, brute force, data structures, dp	1600	x13238
1856B	Good Arrays implementation, math	900	x25092
1856A	Tales of a Sort implementation	800	x26907
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x28997
1855A	Dalton the Teacher greedy, math	800	x28460
1854F	Mark and Spaceship brute force, dp	3500	x127
1854E	Game Bundles brute force, constructive algorithms, dp, greedy, math	3000	x453
1854D	Michael and Hotel binary search, interactive, trees	3000	x577
1854C	Expected Destruction combinatorics, dp, math, probabilities	2500	x1575
1854B	Earn or Unlock bitmasks, brute force, dp	2200	x3683
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x7178
1854A1	Dual (Easy Version) constructive algorithms, math	1400	x14580
1853B	Fibonaccharsis binary search, brute force, math	1200	x17983
1853A	Desorting brute force, greedy, math	800	x34914
1852F	Panda Meetups data structures, dp, flows	3500	x113
1852E	Rivalries constructive algorithms, data structures, greedy	3400	x177
1852D	Miriany and Matchstick constructive algorithms, dp, greedy	2800	x494
1852C	Ina of the Mountain data structures, dp, greedy, math	2400	x1666
1852B	Imbalanced Arrays constructive algorithms, graphs, greedy, math, sortings, two pointers	1800	x4727
1852A	Ntarsis' Set binary search, math, number theory	1800	x8301
1851G	Vlad and the Mountains binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers	2000	x3389
1851F	Lisa and the Martians bitmasks, greedy, math, strings, trees	1800	x6148
1851E	Nastya and Potions dfs and similar, dp, graphs, sortings	1500	x10877
1851D	Prefix Permutation Sums implementation, math	1300	x15714
1851C	Tiles Comeback greedy	1000	x24001
1851B	Parity Sort greedy, sortings, two pointers	800	x29979
1851A	Escalator Conversations brute force, constructive algorithms, math	800	x30018
1850H	The Third Letter dfs and similar, dsu, graphs, greedy, implementation	1700	x8627
1850G	The Morning Star combinatorics, data structures, geometry, implementation, math, sortings	1500	x13246
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x20599
1850E	Cardboard for Pictures binary search, geometry, implementation, math	1100	x25107
1850D	Balanced Round brute force, greedy, implementation, sortings	900	x40295
1850C	Word on the Paper implementation, strings	800	x46327
1850B	Ten Words of Wisdom implementation, sortings	800	x44497
1850A	To My Critics implementation, sortings	800	x60227
1849F	XOR Partition binary search, bitmasks, data structures, divide and conquer, greedy, trees	2700	x742
1849E	Max to the Right of Min binary search, data structures, divide and conquer, dp, dsu, two pointers	2300	x1742
1849D	Array Painting constructive algorithms, greedy, two pointers	1700	x8926
1849C	Binary String Copying binary search, brute force, data structures, hashing, strings	1600	x11010
1849B	Monsters greedy, math, sortings	1000	x28257
1849A	Morning Sandwich implementation, math	800	x30133
1848F	Vika and Wiki binary search, bitmasks, combinatorics, divide and conquer, dp, math	2400	x1674
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x815
1848D	Vika and Bonuses binary search, brute force, math, ternary search	2200	x2686
1848C	Vika and Price Tags math, number theory	1800	x6524
1848B	Vika and the Bridge binary search, data structures, greedy, implementation, math, sortings	1200	x16322
1848A	Vika and Her Friends games, math	900	x17166
1847F	The Boss's Identity binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings	2500	x930
1847E	Triangle Platinum? brute force, combinatorics, implementation, interactive, math, probabilities	2900	x342
1847D	Professor Higashikata data structures, dsu, greedy, implementation, strings	1900	x3901
1847C	Vampiric Powers, anyone? bitmasks, brute force, dp, greedy	1400	x13332
1847B	Hamon Odyssey bitmasks, greedy, two pointers	1000	x20521
1847A	The Man who became a God greedy, sortings	800	x22189
1846G	Rudolf and CodeVid-23 bitmasks, dp, graphs, greedy, shortest paths	1900	x4602
1846F	Rudolph and Mimic constructive algorithms, implementation, interactive	1800	x3249
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x7260
1846E1	Rudolf and Snowflakes (simple version) brute force, implementation, math	1300	x18063
1846D	Rudolph and Christmas Tree constructive algorithms, geometry, math	1200	x20154
1846C	Rudolf and the Another Competition constructive algorithms, data structures, dp, greedy, sortings	1200	x19712
1846B	Rudolph and Tic-Tac-Toe brute force, implementation, strings	800	x27393
1846A	Rudolph and Cut the Rope implementation, math	800	x32934
1845F	Swimmers in the Pool dp, fft, math, number theory	2800	x378
1845E	Boxes and Balls dp, implementation, math	2500	x1392
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x8095
1845C	Strong Password binary search, dp, greedy, strings	1400	x14818
1845B	Come Together geometry, implementation, math	900	x22041
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x29696
1844H	Multiple of Three Cycles combinatorics, data structures, dp, dsu, math	3400	x145
1844G	Tree Weights bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees	3000	x864
1844F2	Min Cost Permutation (Hard Version) binary search, constructive algorithms, data structures, greedy, math, sortings	2800	x409
1844F1	Min Cost Permutation (Easy Version) brute force, constructive algorithms, greedy, math	2600	x799
1844E	Great Grids 2-sat, constructive algorithms, dfs and similar, dsu, graphs	2400	x1921
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x12694
1844C	Particles dp, greedy, implementation, math	1300	x16275
1844B	Permutations & Primes constructive algorithms, math	1000	x18690
1844A	Subtraction Game constructive algorithms, games	800	x24901
1843F2	Omsk Metro (hard version) data structures, dfs and similar, divide and conquer, dp, math, trees	2300	x1697
1843F1	Omsk Metro (simple version) data structures, dfs and similar, dp, graphs, greedy, math, trees	1800	x5538
1843E	Tracking Segments binary search, brute force, data structures, two pointers	1600	x13293
1843D	Apple Tree combinatorics, dfs and similar, dp, math, trees	1200	x18777
1843C	Sum in Binary Tree bitmasks, combinatorics, math, trees	800	x34491
1843B	Long Long greedy, math, two pointers	800	x29678