Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
38:27:47
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number theory

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Problems

#	Name
1487D	Pythagorean Triples binary search, brute force, math, number theory	1500	x16956
1397B	Power Sequence brute force, math, number theory, sortings	1500	x14342
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x13518
576A	Vasya and Petya's Game math, number theory	1500	x13148
1444A	Division brute force, math, number theory	1500	x12533
1379B	Dubious Cyrpto binary search, brute force, math, number theory	1500	x12463
707C	Pythagorean Triples math, number theory	1500	x12268
1242A	Tile Painting constructive algorithms, math, number theory	1500	x12262
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12077
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11811
1673C	Palindrome Basis brute force, dp, math, number theory	1500	x11647
1811E	Living Sequence binary search, dp, math, number theory	1500	x11500
1804C	Pull Your Luck brute force, greedy, math, number theory	1500	x11473
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x11362
1133D	Zero Quantity Maximization hashing, math, number theory	1500	x10901
1858B	The Walkway brute force, dp, greedy, math, number theory	1500	x10577
1744E1	Divisible Numbers (easy version) brute force, math, number theory	1500	x10171
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9817
1005D	Polycarp and Div 3 dp, greedy, number theory	1500	x9796
414A	Mashmokh and Numbers constructive algorithms, number theory	1500	x9623
264B	Good Sequences dp, number theory	1500	x9598
891A	Pride brute force, dp, greedy, math, number theory	1500	x9583
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9024
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x8909
1062B	Math greedy, math, number theory	1500	x8390
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8229
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7659
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7449
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1500	x7138
630K	Indivisibility math, number theory	1500	x5016
566F	Clique in the Divisibility Graph dp, math, number theory	1500	x3516
172D	Calendar Reform *special problem, number theory	1500	x1381
235A	LCM Challenge number theory	1600	x16772
1458A	Row GCD math, number theory	1600	x15918
1349A	Orac and LCM data structures, math, number theory	1600	x15859
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15171
1165D	Almost All Divisors math, number theory	1600	x15105
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x14944
1514C	Product 1 Modulo N greedy, number theory	1600	x14227
1342C	Yet Another Counting Problem math, number theory	1600	x13585
1305C	Kuroni and Impossible Calculation brute force, combinatorics, math, number theory	1600	x13542
1542C	Strange Function math, number theory	1600	x13485
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x13050
735D	Taxes math, number theory	1600	x12621
1753B	Factorial Divisibility math, number theory	1600	x11999
75C	Modified GCD binary search, number theory	1600	x11958
1920C	Partitioning the Array brute force, math, number theory	1600	x11711
1771C	Hossam and Trainees greedy, math, number theory	1600	x8962
678C	Joty and Chocolate implementation, math, number theory	1600	x8923
1612D	X-Magic Pair math, number theory	1600	x8815
1907E	Good Triples brute force, combinatorics, number theory	1600	x8710
343A	Rational Resistance math, number theory	1600	x8502
346A	Alice and Bob games, math, number theory	1600	x8442
1766D	Lucky Chains math, number theory	1600	x8324
1025B	Weakened Common Divisor brute force, greedy, number theory	1600	x7749
1928C	Physical Education Lesson brute force, math, number theory	1600	x7384
922C	Cave Painting brute force, number theory	1600	x6838
1932E	Final Countdown implementation, math, number theory	1600	x6661
986A	Fair graphs, greedy, number theory, shortest paths	1600	x6512
495B	Modular Equations math, number theory	1600	x6445
71C	Round Table Knights dp, math, number theory	1600	x6215
992B	Nastya Studies Informatics math, number theory	1600	x6085
1505B	DMCA *special problem, implementation, number theory	1600	x5994
237C	Primes on Interval binary search, number theory, two pointers	1600	x5542
568A	Primes or Palindromes? brute force, implementation, math, number theory	1600	x4998
337C	Quiz binary search, greedy, math, matrices, number theory	1600	x4765
353C	Find Maximum implementation, math, number theory	1600	x4712
1423K	Lonely Numbers binary search, math, number theory, two pointers	1600	x4649
375A	Divisible by Seven math, number theory	1600	x4649
626C	Block Towers brute force, greedy, math, number theory	1600	x4286
154B	Colliders math, number theory	1600	x4227
1056B	Divide Candies math, number theory	1600	x4065
225B	Well-known Numbers binary search, greedy, number theory	1600	x3098
171F	ucyhf *special problem, brute force, implementation, number theory	1600	x1243
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13014
1537D	Deleting Divisors games, math, number theory	1700	x11824
1325D	Ehab the Xorcist bitmasks, constructive algorithms, greedy, number theory	1700	x11510
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11192
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9507
385C	Bear and Prime Numbers binary search, brute force, data structures, dp, implementation, math, number theory	1700	x9364
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9131
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8898
490C	Hacking Cypher brute force, math, number theory, strings	1700	x8897
1228C	Primes and Multiplication math, number theory	1700	x8677
1061C	Multiplicity data structures, dp, implementation, math, number theory	1700	x8332
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8247
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8024
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x7912
1260C	Infinite Fence greedy, math, number theory	1700	x7864
1512G	Short Task brute force, dp, math, number theory	1700	x7784
1798C	Candy Store greedy, math, number theory	1700	x7753
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7675
582A	GCD Table constructive algorithms, greedy, number theory	1700	x7533
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7245
1690F	Shifting String graphs, math, number theory, strings	1700	x6771
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6649
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6452
833A	The Meaningless Game math, number theory	1700	x6014
798C	Mike and gcd problem dp, greedy, number theory	1700	x5575
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5380