Problemset - Codeforces

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

→ Pay attention

Before contest
Codeforces Round (Div. 2)
7 days

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1873F	Money Trees binary search, greedy, math, two pointers	1300	x15485
1873E	Building an Aquarium binary search, sortings	1100	x26674
1873D	1D Eraser greedy, implementation, two pointers	800	x35034
1873C	Target Practice implementation, math	800	x40567
1873B	Good Kid brute force, greedy, math	800	x48483
1873A	Short Sort brute force, implementation	800	x53902
1872G	Replace With Product brute force, greedy, math	2000	x4269
1872F	Selling a Menagerie dfs and similar, dsu, graphs, implementation, math	1800	x6321
1872E	Data Structures Fan binary search, bitmasks, data structures, dp	1500	x13560
1872D	Plus Minus Permutation math	1200	x23954
1872C	Non-coprime Split math, number theory	1100	x23377
1872B	The Corridor or There and Back Again greedy, implementation	900	x27864
1872A	Two Vessels brute force, greedy, math	800	x39084
1870H	Standard Graph Problem data structures, graphs, greedy, trees	3500	x85
1870G	MEXanization data structures	3300	x217
1870F	Lazy Numbers binary search, math	2900	x487
1870E	Another MEX Problem bitmasks, brute force, dp, shortest paths	2300	x2350
1870D	Prefix Purchase greedy, implementation, sortings	1800	x6977
1870C	Colorful Table binary search, data structures, dp, implementation, math, two pointers	1300	x11478
1870B	Friendly Arrays bitmasks, greedy, math	1200	x14156
1870A	MEXanized Array constructive algorithms, greedy, math	800	x19001
1869B	2D Traveling geometry, math, shortest paths, sortings	1100	x16093
1869A	Make It Zero constructive algorithms	900	x21644
1868F	LIS? data structures, greedy, implementation	3500	x76
1868E	Min-Sum-Max constructive algorithms, dp, greedy	3500	x84
1868D	Flower-like Pseudotree constructive algorithms, graphs, greedy, implementation, trees	3000	x286
1868C	Travel Plan combinatorics, dp, implementation, math, trees	2400	x1152
1868B2	Candy Party (Hard Version) bitmasks, constructive algorithms, dp, greedy, implementation, math	2100	x2407
1868B1	Candy Party (Easy Version) bitmasks, constructive algorithms, graphs, greedy, implementation, math	1700	x6968
1868A	Fill in the Matrix constructive algorithms, implementation	1300	x11994
1867F	Most Different Tree brute force, constructive algorithms, dfs and similar, greedy, hashing	2700	x419
1867E2	Salyg1n and Array (hard version) constructive algorithms, interactive	2200	x3181
1867E1	Salyg1n and Array (simple version) constructive algorithms, interactive, math	2000	x3751
1867D	Cyclic Operations brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	1800	x5771
1867C	Salyg1n and the MEX Game constructive algorithms, data structures, games, greedy, interactive	1300	x11234
1867B	XOR Palindromes bitmasks, constructive algorithms, strings	1100	x16732
1867A	green_gold_dog, array and permutation constructive algorithms, sortings	800	x19917
1866M	Mighty Rock Tower brute force, combinatorics, dp, math, probabilities	2400	x782
1866L	Lihmuf Balling binary search, brute force, math	2400	x707
1866K	Keen Tree Calculation binary search, data structures, dp, geometry, graphs, implementation, trees	2500	x442
1866J	Jackets and Packets dp	2800	x288
1866I	Imagination Castle dp, games, two pointers	2300	x765
1866H	Happy Sets combinatorics	2100	x1650
1866G	Grouped Carriages binary search, data structures, dp, flows, greedy	2100	x1689
1866F	Freak Joker Process binary search, data structures, sortings	3100	x136
1866E	Elevators of Tamem dp	2700	x403
1866D	Digital Wallet dp, greedy	2300	x1311
1866C	Completely Searching for Inversions dfs and similar, dp, graphs	1900	x3046
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7724
1866A	Ambitious Kid math	800	x22058
1864I	Future Dominators graphs, greedy	3500	x88
1864H	Asterism Stream dp, math, matrices	3200	x280
1864G	Magic Square combinatorics, constructive algorithms, implementation	3100	x271
1864F	Exotic Queries data structures, implementation, sortings	2300	x1436
1864E	Guess Game bitmasks, data structures, games, math, probabilities, sortings, strings, trees	2100	x2635
1864D	Matrix Cascade brute force, constructive algorithms, data structures, dp, greedy, math	1700	x6763
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x13488
1864B	Swap and Reverse constructive algorithms, greedy, sortings, strings	1100	x15357
1864A	Increasing and Decreasing constructive algorithms, greedy, implementation, math	800	x20283
1863I	Redundant Routes constructive algorithms, dp, trees	3500	x77
1863H	Goldberg Machine 3 dp, trees	3500	x77
1863G	Swaps combinatorics, dp, graphs, math	2800	x623
1863F	Divide, XOR, and Conquer bitmasks, dp, math	2600	x1128
1863E	Speedrun brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers	2100	x2772
1863D	Two-Colored Dominoes constructive algorithms, greedy	1400	x9504
1863C	MEX Repetition implementation, math	1100	x14025
1863B	Split Sort greedy, math, sortings	1100	x15275
1863A	Channel greedy, implementation	800	x17918
1862G	The Great Equalizer binary search, data structures, math, sortings	2000	x2872
1862F	Magic Will Save the World binary search, bitmasks, brute force, dp	1800	x6249
1862E	Kolya and Movie Theatre constructive algorithms, data structures, greedy	1600	x10702
1862D	Ice Cream Balls binary search, combinatorics, constructive algorithms, math	1300	x17185
1862C	Flower City Fence binary search, data structures, implementation, sortings	1100	x20803
1862B	Sequence Game constructive algorithms	800	x32181
1862A	Gift Carpet dp, greedy, implementation, strings	800	x32434
1861F	Four Suits binary search, bitmasks, flows, greedy	3200	x203
1861E	Non-Intersecting Subpermutations combinatorics, dp, implementation, math	2300	x1724
1861D	Sorting By Multiplication dp, greedy	1800	x6765
1861C	Queries for the Array data structures, dfs and similar, implementation, strings, trees	1600	x10121
1861B	Two Binary Strings constructive algorithms, dp, greedy	1000	x21334
1861A	Prime Deletion constructive algorithms, math	800	x23851
1860F	Evaluate RBS data structures, geometry, implementation, math, sortings	2900	x274
1860E	Fast Travel Text Editor data structures, dfs and similar, graphs, shortest paths	2400	x1403
1860D	Balanced String dp	2200	x2984
1860C	Game on Permutation data structures, dp, games, greedy	1400	x13321
1860B	Fancy Coins binary search, brute force, greedy, math	1200	x16938
1860A	Not a Substring constructive algorithms, strings	900	x21684
1859F	Teleportation in Byteland data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees	3200	x398
1859E	Maximum Monogonosity brute force, dp, math	2500	x1770
1859D	Andrey and Escape from Capygrad binary search, data structures, dp, dsu, greedy, sortings	1800	x6992
1859C	Another Permutation Problem brute force, dp, greedy, math	1200	x16997
1859B	Olya and Game with Arrays constructive algorithms, greedy, math, sortings	1000	x27198
1859A	United We Stand constructive algorithms, math, number theory	800	x32631
1858E2	Rollbacks (Hard Version) data structures, interactive, trees	2600	x1064
1858E1	Rollbacks (Easy Version) brute force, data structures, dfs and similar, trees	2500	x1331
1858D	Trees and Segments brute force, data structures, dp, greedy, two pointers	2200	x2825
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x23073
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x11314
1858A	Buttons games, greedy, math	800	x38516
1857G	Counting Graphs combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees	2000	x4448