Problemset - Codeforces

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Codeforces Round (Div. 2)
46:14:18
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Difficulty: —

math

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Problems

#	Name
1788B	Sum of Two Numbers constructive algorithms, greedy, implementation, math, probabilities	1100	x19657
1788A	One and Two brute force, implementation, math	800	x28904
1787F	Inverse Transformation constructive algorithms, implementation, math	2500	x647
1787E	The Harmonization of XOR bitmasks, constructive algorithms, greedy, math	2100	x2260
1787C	Remove the Bracket dp, greedy, math	1600	x6897
1787B	Number Factorization greedy, math, number theory	1100	x12994
1787A	Exponential Equation constructive algorithms, math	800	x18956
1783E	Game of the Year brute force, data structures, math, number theory	2300	x2062
1783B	Matrix of Differences constructive algorithms, math	1100	x17532
1783A	Make it Beautiful constructive algorithms, math, sortings	800	x28648
1781F	Bracket Insertion combinatorics, dp, math, trees	2700	x807
1781D	Many Perfect Squares brute force, math, number theory	1800	x5393
1781A	Parallel Projection geometry, math	800	x14985
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x681
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1346
1780B	GCD Partition brute force, greedy, math, number theory	1100	x17338
1779B	MKnez's ConstructiveForces Task constructive algorithms, math	900	x23278
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x629
1778E	The Tree Has Fallen! bitmasks, dfs and similar, math, trees	2500	x845
1778D	Flexible String Revisit combinatorics, dp, math, probabilities	2100	x2652
1778B	The Forbidden Permutation greedy, math	1300	x13092
1777D	Score of a Tree bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees	1900	x3371
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x8234
1777B	Emordnilap combinatorics, greedy, math	900	x17209
1777A	Everybody Likes Good Arrays! greedy, math	800	x22950
1776N	Count Permutations math	3500	x78
1776L	Controllers binary search, math	1500	x5597
1776K	Uniform Chemistry dp, math	3200	x65
1776G	Another Wine Tasting Event combinatorics, constructive algorithms, math, strings	2100	x1983
1776D	Teamwork constructive algorithms, greedy, math	2800	x350
1775F	Laboratory on Pluto constructive algorithms, dp, greedy, math	2500	x754
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x6022
1775C	Interesting Sequence bitmasks, math	1600	x10096
1774B	Coloring constructive algorithms, greedy, math	1500	x11925
1774A	Add Plus Minus Sign constructive algorithms, math	800	x22232
1773J	Jumbled Trees constructive algorithms, math	2900	x104
1773G	Game of Questions bitmasks, combinatorics, dp, fft, math, probabilities	2800	x347
1773A	Amazing Trick constructive algorithms, graph matchings, math, probabilities	1900	x1504
1772G	Gaining Rating binary search, greedy, implementation, math, sortings, two pointers	2200	x1310
1772D	Absolute Sorting constructive algorithms, math	1400	x15430
1772C	Different Differences constructive algorithms, greedy, math	1000	x23207
1771C	Hossam and Trainees greedy, math, number theory	1600	x9396
1771A	Hossam and Combinatorics combinatorics, math, sortings	900	x22514
1770G	Koxia and Bracket divide and conquer, fft, math	3400	x158
1770F	Koxia and Sequence bitmasks, combinatorics, dp, math, number theory	3100	x638
1770E	Koxia and Tree combinatorics, dfs and similar, dp, dsu, math, probabilities, trees	2400	x1323
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8417
1769B2	Копирование файлов II *special problem, binary search, brute force, math	1400	x865
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1330
1769A	Узкая дорога *special problem, math	800	x1924
1768E	Partial Sorting combinatorics, math, number theory	2300	x1816
1768B	Quick Sort greedy, math	900	x22608
1768A	Greatest Convex greedy, math, number theory	800	x28469
1767E	Algebra Flash bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees	2500	x873
1767D	Playoff combinatorics, constructive algorithms, dp, greedy, math	1500	x9674
1766D	Lucky Chains math, number theory	1600	x8691
1765M	Minimum LCM math, number theory	1000	x13941
1765K	Torus Path greedy, math	1500	x5569
1765J	Hero to Zero graph matchings, math	2900	x188
1765E	Exchange brute force, math	1000	x9830
1764D	Doremy's Pegging Game combinatorics, dp, math	2000	x2705
1764B	Doremy's Perfect Math Class math, number theory	900	x15666
1763E	Node Pairs dp, graphs, math, number theory	2200	x1748
1763D	Valid Bitonic Permutations combinatorics, dp, implementation, math, number theory	2200	x1994
1763B	Incinerate binary search, brute force, data structures, implementation, math, sortings	1200	x14368
1763A	Absolute Maximization bitmasks, constructive algorithms, greedy, math	800	x15541
1762E	Tree Sum combinatorics, math, trees	2600	x622
1762C	Binary Strings are Fun combinatorics, math	1400	x9028
1762A	Divide and Conquer greedy, math, number theory	800	x18834
1761F2	Anti-median (Hard Version) combinatorics, dp, math	3500	x79
1761F1	Anti-median (Easy Version) dp, math	3100	x205
1761D	Carry Bit combinatorics, math	2100	x2391
1760E	Binary Inversions data structures, greedy, math	1100	x19783
1759G	Restore the Permutation binary search, constructive algorithms, data structures, greedy, math	1900	x4364
1759F	All Possible Digits binary search, data structures, greedy, math, number theory	1800	x3827
1759C	Thermostat greedy, math, shortest paths	1100	x17344
1759B	Lost Permutation math	800	x21995
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x7107
1754B	Kevin and Permutation constructive algorithms, greedy, math	800	x18776
1753C	Wish I Knew How to Sort dp, math, probabilities	2000	x4274
1753B	Factorial Divisibility math, number theory	1600	x12454
1750G	Doping combinatorics, dp, math	3300	x232
1750F	Majority combinatorics, dp, math, strings	2700	x883
1750D	Count GCD combinatorics, math, number theory	1800	x5733
1750A	Indirect Sort constructive algorithms, implementation, math	800	x16949
1749D	Counting Arrays combinatorics, dp, math, number theory	1900	x5451
1748E	Yet Another Array Counting Problem binary search, data structures, divide and conquer, dp, flows, math, trees	2300	x1800
1748D	ConstructOR bitmasks, chinese remainder theorem, combinatorics, constructive algorithms, math, number theory	2100	x2721
1748A	The Ultimate Square math	800	x23830
1747E	List Generation combinatorics, dp, math	2900	x491
1746C	Permutation Operations constructive algorithms, greedy, implementation, math	1300	x12616
1744F	MEX vs MED math, two pointers	2000	x2991
1744E2	Divisible Numbers (hard version) brute force, math, number theory	1900	x5461
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10595
1744D	Divisibility by 2^n greedy, math, sortings	1200	x20936
1744B	Even-Odd Increments implementation, math	800	x23222
1743G	Antifibonacci Cut bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math	3000	x249
1743A	Password brute force, combinatorics, implementation, math	800	x26478
1742G	Orray bitmasks, brute force, greedy, math, sortings	1500	x10339
1742E	Scuza binary search, greedy, math	1200	x23338