Problemset - Codeforces

→ Pay attention

Before contest
Educational Codeforces Round 173 (Rated for Div. 2)
22:52:56
Register now »

→ Filter Problems

Difficulty: —

Add tag

Problems

#	Name
1567B	MEXor Mixup bitmasks, greedy	1000	x23708
1567A	Domino Disaster implementation, strings	800	x30276
1566H	Xor-quiz constructive algorithms, dp, interactive, math, number theory	3200	x129
1566G	Four Vertices constructive algorithms, data structures, graphs, greedy, implementation, shortest paths	3100	x344
1566F	Points Movement data structures, dp, greedy, implementation, sortings	2600	x962
1566E	Buds Re-hanging constructive algorithms, dfs and similar, dp, greedy, trees	2000	x4196
1566D2	Seating Arrangements (hard version) data structures, greedy, implementation, sortings, two pointers	1600	x7931
1566D1	Seating Arrangements (easy version) data structures, greedy, sortings	1100	x14101
1566C	MAX-MEX Cut bitmasks, constructive algorithms, dp, greedy	1000	x17768
1566B	MIN-MEX Cut bitmasks, constructive algorithms, dp, greedy	800	x19866
1566A	Median Maximization binary search, greedy, math	800	x23663
1562F	Tubular Bells interactive, math, number theory, probabilities	2900	x409
1562E	Rescue Niwen! dp, greedy, string suffix structures, strings	2500	x1430
1562D2	Two Hundred Twenty One (hard version) data structures, math	2200	x2151
1562D1	Two Hundred Twenty One (easy version) data structures, dp, math	1700	x6397
1562C	Rings constructive algorithms, math	1500	x13428
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19744
1562A	The Miracle and the Sleeper greedy, math	800	x25728
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5672
1561C	Deep Down Below binary search, greedy, sortings	1300	x15156
1561A	Simply Strange Sort brute force, implementation, sortings	800	x16625
1560F2	Nearest Beautiful Number (hard version) bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy	2100	x4468
1560F1	Nearest Beautiful Number (easy version) binary search, bitmasks, brute force, constructive algorithms, dfs and similar, greedy	1900	x6215
1560E	Polycarp and String Transformation binary search, implementation, sortings, strings	1800	x8149
1560D	Make a Power of Two greedy, math, strings	1300	x18358
1560C	Infinity Table implementation, math	800	x26787
1560B	Who's Opposite? math	800	x36113
1560A	Dislike of Threes implementation	800	x61698
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2347
1559D2	Mocha and Diana (Hard Version) brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers	2500	x2691
1559D1	Mocha and Diana (Easy Version) brute force, constructive algorithms, dsu, graphs, greedy, trees	1400	x14084
1559C	Mocha and Hiking constructive algorithms, graphs	1200	x20776
1559B	Mocha and Red and Blue dp, greedy	900	x22724
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x32454
1558F	Strange Sort data structures, sortings	3300	x399
1558E	Down Below binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths	3000	x484
1558D	Top-Notch Insertions combinatorics, data structures	2600	x984
1558C	Bottom-Tier Reversals constructive algorithms, greedy	2000	x3383
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4850
1558A	Charmed by the Game brute force, math	1300	x11146
1557E	Assiut Chess brute force, constructive algorithms, interactive	2800	x719
1557D	Ezzat and Grid data structures, dp, greedy	2200	x2589
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8690
1557B	Moamen and k-subarrays greedy, sortings	1100	x23613
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x28067
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x377
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x341
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1275
1556E	Equilibrium data structures, dp, greedy	2200	x2747
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x7119
1556C	Compressed Bracket Sequence brute force, implementation	1800	x5835
1556B	Take Your Places! implementation	1300	x12783
1556A	A Variety of Operations math	800	x18133
1555F	Good Graph data structures, dsu, graphs, trees	2700	x873
1555E	Boring Segments data structures, sortings, trees, two pointers	2100	x4086
1555D	Say No to Palindromes brute force, constructive algorithms, dp, strings	1600	x12648
1555C	Coin Rows brute force, constructive algorithms, dp, implementation	1300	x22101
1555B	Two Tables brute force	1300	x16204
1555A	PizzaForces brute force, math	900	x28446
1554E	You dfs and similar, dp, math, number theory	2600	x1249
1554D	Diane constructive algorithms, greedy, strings	1800	x9610
1554C	Mikasa binary search, bitmasks, greedy, implementation	1800	x9013
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12926
1554A	Cherry greedy	800	x29610
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x209
1553H	XOR and Distance bitmasks, divide and conquer, trees	2900	x719
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x1063
1553F	Pairwise Modulo data structures, math	2300	x2258
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3394
1553D	Backspace dp, greedy, strings, two pointers	1500	x13899
1553C	Penalty bitmasks, brute force, dp, greedy	1200	x18128
1553B	Reverse String brute force, dp, hashing, implementation, strings	1300	x14279
1553A	Digits Sum math, number theory	800	x31465
1552I	Organizing a Music Festival dfs and similar, math	3400	x130
1552H	Guess the Perimeter binary search, interactive, number theory	3300	x394
1552G	A Serious Referee bitmasks, brute force, dfs and similar, sortings	3000	x536
1552F	Telepanting binary search, data structures, dp, sortings	2200	x2981
1552E	Colors and Intervals constructive algorithms, data structures, greedy, sortings	2300	x1926
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x7123
1552C	Maximize the Intersections combinatorics, constructive algorithms, geometry, greedy, sortings	1800	x5959
1552B	Running for Gold combinatorics, graphs, greedy, sortings	1500	x15610
1552A	Subsequence Permutation sortings, strings	800	x24008
1551F	Equidistant Vertices brute force, combinatorics, dfs and similar, dp, trees	2200	x1869
1551E	Fixed Points binary search, brute force, dp	2000	x4010
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2793
1551D1	Domino (easy version) constructive algorithms, math	1700	x7164
1551C	Interesting Story greedy, sortings, strings	1500	x13456
1551B2	Wonderful Coloring - 2 binary search, constructive algorithms, data structures, greedy	1400	x15654
1551B1	Wonderful Coloring - 1 greedy, strings	800	x29764
1551A	Polycarp and Coins greedy, math	800	x51999
1550F	Jumping Around binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths	2700	x694
1550E	Stringforces binary search, bitmasks, brute force, dp, strings, two pointers	2500	x1567
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1872
1550C	Manhattan Subarrays brute force, geometry, greedy, implementation	1700	x10269
1550B	Maximum Cost Deletion greedy, math	1000	x26751
1550A	Find The Array greedy, math	800	x28336
1549B	Gregor and the Pawn Game dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation	800	x24706
1549A	Gregor and Cryptography math, number theory	800	x32935
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x466
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x266