Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
40:14:34
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number theory

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Problems

#	Name
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17013
1810B	Candies constructive algorithms, math, number theory	800	x17117
1736B	Playing with GCD math, number theory	1200	x17216
664A	Complicated GCD math, number theory	800	x17373
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17497
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17501
1411B	Fair Numbers brute force, number theory	1000	x17720
762A	k-th divisor math, number theory	1400	x17885
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x17943
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18079
1932B	Chaya Calendar number theory	1100	x18161
1538F	Interesting Function binary search, dp, math, number theory	1500	x18283
1658B	Marin and Anti-coprime Permutation combinatorics, math, number theory	800	x18346
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18447
1762A	Divide and Conquer greedy, math, number theory	800	x18504
1717A	Madoka and Strange Thoughts math, number theory	800	x19103
1945B	Fireworks math, number theory	900	x19141
1562B	Scenes From a Memory brute force, constructive algorithms, implementation, math, number theory	1000	x19154
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19241
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19316
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x19523
1593D1	All are Same math, number theory	1100	x19538
1740A	Factorise N+M constructive algorithms, number theory	800	x19574
1487B	Cat Cycle math, number theory	1200	x19583
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19693
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20221
1605A	A.M. Deviation math, number theory	800	x20317
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20418
1828B	Permutation Swap math, number theory	900	x20526
1350B	Orac and Models dp, math, number theory	1400	x20528
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20716
1485A	Add and Divide brute force, greedy, math, number theory	1000	x20753
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20757
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21212
1742D	Coprime brute force, greedy, number theory	1100	x21473
1720A	Burenka Plays with Fractions math, number theory	900	x21699
1679A	AvtoBus brute force, greedy, math, number theory	900	x21750
1872C	Non-coprime Split math, number theory	1100	x21850
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x21872
1285C	Fadi and LCM brute force, math, number theory	1400	x21901
1511B	GCD Length constructive algorithms, math, number theory	1100	x21924
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x21999
483A	Counterexample brute force, implementation, math, number theory	1100	x22136
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x22345
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x22351
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22714
1629B	GCD Arrays greedy, math, number theory	800	x22945
1370B	GCD Compression constructive algorithms, math, number theory	1100	x23061
1238A	Prime Subtraction math, number theory	900	x23228
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23395
1916B	Two Divisors constructive algorithms, math, number theory	1000	x23479
1370C	Number Game games, math, number theory	1400	x23489
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x23596
1514A	Perfectly Imperfect Array math, number theory	800	x23768
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x24088
1471A	Strange Partition greedy, math, number theory	900	x24420
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x24424
1916A	2023 constructive algorithms, implementation, math, number theory	800	x24442
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x24527
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x25009
1525A	Potion-making math, number theory	800	x25043
1324A	Yet Another Tetris Problem implementation, number theory	900	x25253
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25289
1455A	Strange Functions math, number theory	800	x25983
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26074
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x26240
1543A	Exciting Bets greedy, math, number theory	900	x26289
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26387
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26739
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x26793
1768A	Greatest Convex greedy, math, number theory	800	x27923
26A	Almost Prime number theory	900	x28432
1526B	I Hate 1111 dp, math, number theory	1400	x28566
1859A	United We Stand constructive algorithms, math, number theory	800	x29086
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x29340
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x29526
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x29576
1473B	String LCM brute force, math, number theory, strings	1000	x29606
1553A	Digits Sum math, number theory	800	x30067
1360D	Buying Shovels math, number theory	1300	x30670
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31014
1549A	Gregor and Cryptography math, number theory	800	x31270
822A	I'm bored with life implementation, math, number theory	800	x31614
1294C	Product of Three Numbers greedy, math, number theory	1300	x32178
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x35234
1899A	Game with Integers games, math, number theory	800	x37341
577A	Multiplication Table implementation, number theory	1000	x37959
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x38017
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x38236
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39731
1520B	Ordinary Numbers brute force, math, number theory	800	x42699
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46316
1370A	Maximum GCD greedy, implementation, math, number theory	800	x48573
313A	Ilya and Bank Account implementation, number theory	900	x53432
1475A	Odd Divisor math, number theory	900	x54872
472A	Design Tutorial: Learn from Math math, number theory	800	x56848
630A	Again Twenty Five! number theory	800	x61665
230B	T-primes binary search, implementation, math, number theory	1300	x69631
122A	Lucky Division brute force, number theory	1000	x115633

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