Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
36:56:09
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1794D	Counting Factorizations combinatorics, divide and conquer, dp, math, number theory	1900	x3323
1794C	Scoring Subsequences binary search, greedy, math, two pointers	1300	x12339
1794B	Not Dividing constructive algorithms, greedy, math	900	x19207
1793D	Moscow Gorillas binary search, dp, greedy, implementation, math, two pointers	1800	x5721
1793B	Fedya and Array constructive algorithms, math	1100	x15158
1793A	Yet Another Promotion greedy, math	800	x17678
1792D	Fixed Prefix Permutations binary search, bitmasks, data structures, hashing, math, sortings	1700	x5848
1792C	Min Max Sort binary search, brute force, greedy, math, two pointers	1500	x13100
1792B	Stand-up Comedian greedy, math	1200	x20091
1790F	Timofey and Black-White Tree brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees	2100	x3115
1790C	Premutation brute force, implementation, math	1000	x22835
1790B	Taisia and Dice greedy, greedy, math	800	x26576
1790A	Polycarp and the Day of Pi implementation, math, strings	800	x35466
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x754
1789C	Serval and Toxel's Arrays combinatorics, dp, implementation, math	1500	x7999
1789A	Serval and Mocha's Array brute force, math, number theory	800	x16775
1788D	Moving Dots binary search, brute force, combinatorics, math, two pointers	2000	x3693
1788C	Matching Numbers constructive algorithms, greedy, math	1300	x16367
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x19156
1788A	One and Two brute force, implementation, math	800	x27233
1787F	Inverse Transformation constructive algorithms, implementation, math	2500	x624
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2164
1787C	Remove the Bracket dp, greedy, math	1600	x6658
1787B	Number Factorization greedy, math, number theory	1100	x12643
1787A	Exponential Equation constructive algorithms, math	800	x18662
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2009
1783B	Matrix of Differences constructive algorithms, math	1100	x17104
1783A	Make it Beautiful constructive algorithms, math, sortings	800	x26992
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x727
1781D	Many Perfect Squares brute force, math, number theory	1800	x5210
1781A	Parallel Projection geometry, math	800	x14828
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x662
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1293
1780B	GCD Partition brute force, greedy, math, number theory	1100	x16433
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x22939
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x594
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x809
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2524
1778B	The Forbidden Permutation greedy, math	1300	x12856
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3188
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7652
1777B	Emordnilap combinatorics, greedy, math	900	x16540
1777A	Everybody Likes Good Arrays! greedy, math	800	x20979
1776N	Count Permutations math	3500	x63
1776L	Controllers binary search, math	1500	x5095
1776K	Uniform Chemistry dp, math	3200	x63
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1938
1776D	Teamwork constructive algorithms, greedy, math	2800	x332
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x729
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5723
1775C	Interesting Sequence bitmasks, math	1600	x9549
1774B	Coloring constructive algorithms, greedy, math	1500	x11495
1774A	Add Plus Minus Sign constructive algorithms, math	800	x21911
1773J	Jumbled Trees constructive algorithms, math	2900	x95
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x318
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1467
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1260
1772D	Absolute Sorting constructive algorithms, math	1400	x14809
1772C	Different Differences constructive algorithms, greedy, math	1000	x22599
1771C	Hossam and Trainees greedy, math, number theory	1600	x8928
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x21949
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x146
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x594
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1289
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8232
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x853
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1307
1769A	Узкая дорога *special problem, math	800	x1891
1768E	Partial Sorting combinatorics, math, number theory	2300	x1764
1768B	Quick Sort greedy, math	900	x21931
1768A	Greatest Convex greedy, math, number theory	800	x27856
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x823
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9359
1766D	Lucky Chains math, number theory	1600	x8288
1765M	Minimum LCM math, number theory	1000	x12420
1765K	Torus Path greedy, math	1500	x5342
1765J	Hero to Zero graph matchings, math	2900	x181
1765E	Exchange brute force, math	1000	x9469
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2627
1764B	Doremy's Perfect Math Class math, number theory	900	x15197
1763E	Node Pairs dp, graphs, math, number theory	2200	x1681
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1944
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x13833
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15196
1762E	Tree Sum combinatorics, math, trees	2600	x597
1762C	Binary Strings are Fun combinatorics, math	1400	x8809
1762A	Divide and Conquer greedy, math, number theory	800	x18489
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x75
1761F1	Anti-median (Easy Version) dp, math	3100	x196
1761D	Carry Bit combinatorics, math	2100	x2314
1760E	Binary Inversions data structures, greedy, math	1100	x19066
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4195
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3670
1759C	Thermostat greedy, math, shortest paths	1100	x16925
1759B	Lost Permutation math	800	x21533
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x6821
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x18447
1753C	Wish I Knew How to Sort dp, math, probabilities	2000	x4138
1753B	Factorial Divisibility math, number theory	1600	x11959
1750G	Doping combinatorics, dp, math	3300	x222