Problemset - Codeforces

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Educational Codeforces Round 176 (Rated for Div. 2)
24:30:15
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number theory

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Problems

#	Name
122A	Lucky Division brute force, number theory	1000	x130698
230B	T-primes binary search, implementation, math, number theory	1300	x80660
630A	Again Twenty Five! number theory	800	x74849
1475A	Odd Divisor math, number theory	900	x67036
472A	Design Tutorial: Learn from Math math, number theory	800	x63055
313A	Ilya and Bank Account implementation, number theory	900	x58848
1899A	Game with Integers games, math, number theory	800	x55523
1370A	Maximum GCD greedy, implementation, math, number theory	800	x55355
749A	Bachgold Problem greedy, implementation, math, number theory	800	x51575
1985B	Maximum Multiple Sum brute force, math, number theory	800	x49673
1520B	Ordinary Numbers brute force, math, number theory	800	x46002
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x44988
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x43731
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x41805
577A	Multiplication Table implementation, number theory	1000	x41402
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x38745
1294C	Product of Three Numbers greedy, math, number theory	1300	x37276
1859A	United We Stand constructive algorithms, math, number theory	800	x36678
1968A	Maximize? brute force, math, number theory	800	x36336
1360D	Buying Shovels math, number theory	1300	x35337
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x34368
822A	I'm bored with life implementation, math, number theory	800	x34094
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x33982
26A	Almost Prime number theory	900	x33974
1549A	Gregor and Cryptography math, number theory	800	x33451
1473B	String LCM brute force, math, number theory, strings	1000	x32567
1526B	I Hate 1111 dp, math, number theory	1400	x32281
1553A	Digits Sum math, number theory	800	x32046
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x31447
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x31134
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x31097
1845A	Forbidden Integer constructive algorithms, implementation, math, number theory	800	x31023
1543A	Exciting Bets greedy, math, number theory	900	x30631
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x30533
1855B	Longest Divisors Interval brute force, combinatorics, greedy, math, number theory	900	x30296
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x29747
1768A	Greatest Convex greedy, math, number theory	800	x29564
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x29124
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x29072
1471A	Strange Partition greedy, math, number theory	900	x28405
1916B	Two Divisors constructive algorithms, math, number theory	1000	x27852
2063A	Minimal Coprime math, number theory	800	x27643
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x27579
1679A	AvtoBus brute force, greedy, math, number theory	900	x27261
1916A	2023 constructive algorithms, implementation, math, number theory	800	x26995
1455A	Strange Functions math, number theory	800	x26756
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x26501
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x26487
1828B	Permutation Swap math, number theory	900	x26435
1324A	Yet Another Tetris Problem implementation, number theory	900	x26351
1525A	Potion-making math, number theory	800	x26083
1742D	Coprime brute force, greedy, number theory	1100	x25972
1515B	Phoenix and Puzzle brute force, geometry, math, number theory	1000	x25589
1998B	Minimize Equal Sum Subarrays constructive algorithms, math, number theory	1000	x25395
1238A	Prime Subtraction math, number theory	900	x25369
1370C	Number Game games, math, number theory	1400	x25363
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x25161
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x24938
1285C	Fadi and LCM brute force, math, number theory	1400	x24746
1514A	Perfectly Imperfect Array math, number theory	800	x24537
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x24447
1485A	Add and Divide brute force, greedy, math, number theory	1000	x24396
1872C	Non-coprime Split math, number theory	1100	x24376
1617B	GCD Problem brute force, constructive algorithms, math, number theory	900	x24341
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x24125
1370B	GCD Compression constructive algorithms, math, number theory	1100	x24056
1858C	Yet Another Permutation Problem constructive algorithms, greedy, math, number theory	1000	x23960
1945B	Fireworks math, number theory	900	x23899
1629B	GCD Arrays greedy, math, number theory	800	x23895
1350B	Orac and Models dp, math, number theory	1400	x23860
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x23800
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x23800
2007A	Dora's Set greedy, math, number theory	800	x23752
483A	Counterexample brute force, implementation, math, number theory	1100	x23712
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x23683
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x23569
1511B	GCD Length constructive algorithms, math, number theory	1100	x23409
2020A	Find Minimum Operations bitmasks, brute force, greedy, math, number theory	800	x23360
1899B	250 Thousand Tons of TNT brute force, implementation, number theory	1100	x23077
1720A	Burenka Plays with Fractions math, number theory	900	x22950
2032A	Circuit greedy, implementation, math, number theory	800	x22708
1487B	Cat Cycle math, number theory	1200	x22534
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x22438
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x22070
2071A	The Play Never Ends math, number theory		x22047
1712B	Woeful Permutation constructive algorithms, greedy, number theory	800	x21869
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21865
1932B	Chaya Calendar number theory	1100	x21780
1789A	Serval and Mocha's Array brute force, math, number theory	800	x21397
1931D	Divisible Pairs combinatorics, math, number theory	1300	x21361
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x21352
2037C	Superultra's Favorite Permutation constructive algorithms, greedy, math, number theory	1000	x21298
762A	k-th divisor math, number theory	1400	x21291
1411B	Fair Numbers brute force, number theory	1000	x21204
1740A	Factorise N+M constructive algorithms, number theory	800	x21088
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x21069
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x21028
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x20918
1605A	A.M. Deviation math, number theory	800	x20888
1593D1	All are Same math, number theory	1100	x20657

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