Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
22:19:56
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Difficulty: —

number theory

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Problems

#	Name
1033B	Square Difference math, number theory	1100	x9142
735B	Urbanization greedy, number theory, sortings	1100	x8298
858A	k-rounding brute force, math, number theory	1100	x7841
68A	Irrational problem implementation, number theory	1100	x4799
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x26742
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x26392
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x22715
1487B	Cat Cycle math, number theory	1200	x19585
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19245
1656C	Make Equal With Mod constructive algorithms, math, number theory, sortings	1200	x18449
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18087
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x17516
1736B	Playing with GCD math, number theory	1200	x17218
456B	Fedya and Maths math, number theory	1200	x15966
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x14652
1954C	Long Multiplication greedy, math, number theory	1200	x14610
1277B	Make Them Odd greedy, number theory	1200	x14606
1909B	Make Almost Equal With Mod bitmasks, constructive algorithms, math, number theory	1200	x13705
1076B	Divisor Subtraction implementation, math, number theory	1200	x12523
1133B	Preparation for International Women's Day math, number theory	1200	x12324
1068B	LCM math, number theory	1200	x11073
787A	The Monster brute force, math, number theory	1200	x11026
1877C	Joyboard math, number theory	1200	x10002
1143B	Nirvana brute force, math, number theory	1200	x9972
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8514
361B	Levko and Permutation constructive algorithms, math, number theory	1200	x7877
59B	Fortune Telling implementation, number theory	1200	x6639
817A	Treasure Hunt implementation, math, number theory	1200	x6056
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x5819
177B2	Rectangular Game number theory	1200	x2825
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2685
230B	T-primes binary search, implementation, math, number theory	1300	x69643
1294C	Product of Three Numbers greedy, math, number theory	1300	x32183
1360D	Buying Shovels math, number theory	1300	x30684
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x26078
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x23396
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x20719
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x19696
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19316
1850F	We Were Both Children brute force, implementation, math, number theory	1300	x16991
1407B	Big Vova brute force, greedy, math, number theory	1300	x16666
573A	Bear and Poker implementation, math, number theory	1300	x16273
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x16086
1931D	Divisible Pairs combinatorics, math, number theory	1300	x15644
1881D	Divide and Equalize math, number theory	1300	x14240
236B	Easy Number Challenge implementation, number theory	1300	x13436
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x13151
1826C	Dreaming of Freedom greedy, math, number theory	1300	x12746
1864C	Divisor Chain bitmasks, constructive algorithms, math, number theory	1300	x12546
271B	Prime Matrix binary search, brute force, math, number theory	1300	x12340
1902C	Insert and Equalize brute force, constructive algorithms, greedy, math, number theory	1300	x12155
1899D	Yarik and Musical Notes hashing, math, number theory	1300	x12116
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x11787
1823C	Strongly Composite greedy, math, number theory	1300	x11637
1220B	Multiplication Table math, number theory	1300	x11331
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x11307
371B	Fox Dividing Cheese math, number theory	1300	x10893
1155C	Alarm Clocks Everywhere math, number theory	1300	x9058
870C	Maximum splitting dp, greedy, math, number theory	1300	x8950
876B	Divisiblity of Differences implementation, math, number theory	1300	x8678
1209B	Koala and Lights implementation, math, number theory	1300	x7933
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7659
900B	Position in Fraction math, number theory	1300	x7620
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7357
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6953
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6535
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6170
123A	Prime Permutation implementation, number theory, strings	1300	x3511
1526B	I Hate 1111 dp, math, number theory	1400	x28573
1370C	Number Game games, math, number theory	1400	x23492
1285C	Fadi and LCM brute force, math, number theory	1400	x21902
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x20758
1350B	Orac and Models dp, math, number theory	1400	x20533
762A	k-th divisor math, number theory	1400	x17887
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17015
1462D	Add to Neighbour and Remove greedy, math, number theory	1400	x16198
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x15924
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x15788
1714E	Add Modulo 10 brute force, math, number theory	1400	x15194
1627C	Not Assigning constructive algorithms, dfs and similar, number theory, trees	1400	x14014
1606C	Banknotes greedy, number theory	1400	x13714
1838C	No Prime Differences constructive algorithms, math, number theory	1400	x13398
1263C	Everyone is a Winner! binary search, math, meet-in-the-middle, number theory	1400	x13309
1758C	Almost All Multiples greedy, number theory	1400	x12865
1759D	Make It Round brute force, number theory	1400	x12013
1844D	Row Major constructive algorithms, greedy, math, number theory, strings	1400	x11582
1875C	Jellyfish and Green Apple bitmasks, greedy, math, number theory	1400	x10740
757B	Bash's Big Day greedy, math, number theory	1400	x9794
1091C	New Year and the Sphere Transmission math, number theory	1400	x9777
1200C	Round Corridor math, number theory	1400	x9586
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9470
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9347
337B	Routine Problem greedy, math, number theory	1400	x9078
150A	Win or Freeze games, math, number theory	1400	x7560
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7168
937B	Vile Grasshoppers brute force, math, number theory	1400	x6786
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6365
248B	Chilly Willy math, number theory	1400	x5187
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22001
1538F	Interesting Function binary search, dp, math, number theory	1500	x18292