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
1366F	Jog Around The Graph binary search, dp, geometry, graphs	2700	x806
1366E	Two Arrays binary search, brute force, combinatorics, constructive algorithms, dp, two pointers	2100	x4276
1366D	Two Divisors constructive algorithms, math, number theory	2000	x10503
1366C	Palindromic Paths greedy, math	1500	x13580
1366B	Shuffle math, two pointers	1300	x21040
1366A	Shovels and Swords binary search, greedy, math	1100	x30108
1365G	Secure Password bitmasks, combinatorics, constructive algorithms, interactive, math	2800	x1167
1365F	Swaps Again constructive algorithms, implementation, sortings	2100	x4445
1365E	Maximum Subsequence Value brute force, constructive algorithms	1900	x7836
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x17320
1365C	Rotation Matching constructive algorithms, data structures, greedy, implementation	1400	x23118
1365B	Trouble Sort constructive algorithms, implementation	1300	x26866
1365A	Matrix Game games, greedy, implementation	1100	x24099
1364E	X-OR bitmasks, constructive algorithms, divide and conquer, interactive, probabilities	2700	x1425
1364D	Ehab's Last Corollary constructive algorithms, dfs and similar, graphs, greedy, implementation, trees	2100	x4379
1364C	Ehab and Prefix MEXs brute force, constructive algorithms, greedy	1600	x13175
1364B	Most socially-distanced subsequence greedy, two pointers	1300	x19892
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x28085
1363F	Rotating Substrings dp, strings	2600	x1497
1363E	Tree Shuffling dfs and similar, dp, greedy, trees	2000	x6820
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x4080
1363C	Game On Leaves games, trees	1600	x18727
1363B	Subsequence Hate implementation, strings	1400	x23630
1363A	Odd Selection brute force, implementation, math	1200	x35940
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x18347
1362B	Johnny and His Hobbies bitmasks, brute force	1200	x19223
1362A	Johnny and Ancient Computer implementation	1000	x24100
1361F	Johnny and New Toy data structures, implementation, math	3300	x154
1361E	James and the Chase dfs and similar, graphs, probabilities, trees	3000	x690
1361D	Johnny and James greedy, implementation, math, trees	2900	x318
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x1633
1361B	Johnny and Grandmaster greedy, implementation, math, sortings	1900	x3623
1361A	Johnny and Contribution constructive algorithms, graphs, greedy, sortings	1700	x8427
1360H	Binary Median binary search, bitmasks, brute force, constructive algorithms	2100	x4577
1360G	A/B Matrix constructive algorithms, greedy, math	1900	x7768
1360F	Spy-string bitmasks, brute force, constructive algorithms, dp, hashing, strings	1700	x12413
1360E	Polygon dp, graphs, implementation, shortest paths	1300	x25306
1360D	Buying Shovels math, number theory	1300	x33216
1360C	Similar Pairs constructive algorithms, graph matchings, greedy, sortings	1100	x32874
1360B	Honest Coach greedy, sortings	800	x47918
1360A	Minimal Square greedy, math	800	x50581
1359F	RC Kaboom Show binary search, brute force, data structures, geometry, math	2900	x542
1359E	Modular Stability combinatorics, math, number theory	2000	x6113
1359D	Yet Another Yet Another Task data structures, dp, implementation, two pointers	2000	x9460
1359C	Mixing Water binary search, math	1700	x13830
1359B	New Theatre Square brute force, dp, greedy, implementation, two pointers	1000	x27809
1359A	Berland Poker brute force, greedy, math	1000	x29641
1358F	Tasty Cookie binary search, constructive algorithms, greedy, implementation	2700	x451
1358E	Are You Fired? constructive algorithms, data structures, greedy, implementation	2400	x2321
1358D	The Best Vacation binary search, brute force, greedy, implementation, two pointers	1900	x8164
1358C	Celex Update math	1600	x17389
1358B	Maria Breaks the Self-isolation greedy, sortings	1000	x24932
1358A	Park Lighting greedy, math	800	x39437
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x862
1355E	Restorer Distance binary search, greedy, math, sortings, ternary search	2100	x5129
1355D	Game With Array constructive algorithms, math	1400	x18037
1355C	Count Triangles binary search, implementation, math, two pointers	1800	x10653
1355B	Young Explorers dp, greedy, sortings	1200	x25685
1355A	Sequence with Digits brute force, implementation, math	1200	x26595
1354G	Find a Gift binary search, interactive, probabilities	2600	x787
1354F	Summoning Minions constructive algorithms, dp, flows, graph matchings, greedy, sortings	2500	x1225
1354E	Graph Coloring dfs and similar, dp, graphs	2100	x3331
1354D	Multiset binary search, data structures	1900	x8780
1354C2	Not So Simple Polygon Embedding binary search, brute force, geometry, math	2000	x6078
1354C1	Simple Polygon Embedding binary search, geometry, math, ternary search	1400	x15688
1354B	Ternary String binary search, dp, implementation, two pointers	1200	x30964
1354A	Alarm Clock math	900	x23792
1353F	Decreasing Heights brute force, dp	2200	x3329
1353E	K-periodic Garland brute force, dp, greedy	1900	x7150
1353D	Constructing the Array constructive algorithms, data structures, sortings	1600	x18117
1353C	Board Moves math	1000	x35449
1353B	Two Arrays And Swaps greedy, sortings	800	x49671
1353A	Most Unstable Array constructive algorithms, greedy, math	800	x40682
1352G	Special Permutation constructive algorithms	1600	x21237
1352F	Binary String Reconstruction constructive algorithms, dfs and similar, math	1500	x17146
1352E	Special Elements brute force, implementation, two pointers	1500	x20556
1352D	Alice, Bob and Candies implementation	1300	x26205
1352C	K-th Not Divisible by n binary search, math	1200	x54599
1352B	Same Parity Summands constructive algorithms, math	1200	x37652
1352A	Sum of Round Numbers implementation, math	800	x79475
1351C	Skier data structures, implementation	1400	x8554
1351B	Square? brute force, implementation, math	900	x16995
1351A	A+B (Trial Problem) implementation	800	x23915
1350B	Orac and Models dp, math, number theory	1400	x22186
1350A	Orac and Factors math	900	x26087
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x113
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x412
1349E	Slime and Hats constructive algorithms, dp, greedy	3500	x92
1349D	Slime and Biscuits math, probabilities	3200	x905
1349C	Orac and Game of Life dfs and similar, graphs, implementation, shortest paths	2000	x4525
1349B	Orac and Medians constructive algorithms, greedy, math	2000	x8154
1349A	Orac and LCM data structures, math, number theory	1600	x17099
1348F	Phoenix and Memory data structures, dfs and similar, graphs, greedy	2600	x813
1348E	Phoenix and Berries brute force, dp, greedy, math	2400	x2230
1348D	Phoenix and Science binary search, constructive algorithms, greedy, implementation, math	1900	x8853
1348C	Phoenix and Distribution constructive algorithms, greedy, sortings, strings	1600	x14622
1348B	Phoenix and Beauty constructive algorithms, data structures, greedy, sortings	1400	x25346
1348A	Phoenix and Balance greedy, math	800	x39544
1346I	Pac-Man 2.0 *special problem, dp	2900	x49
1346H	Game with Segments *special problem, data structures, games	2700	x50