Problemset - Codeforces

→ Pay attention

Contest is running
Kotlin Heroes: Practice 6
4 days
Register now »

Before contest
Codeforces Round #705 (Div. 2)
23:36:46
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
472A	Design Tutorial: Learn from Math math, number theory	800	x31629
749A	Bachgold Problem greedy, implementation, math, number theory	800	x26113
1370A	Maximum GCD greedy, implementation, math, number theory	800	x25963
630A	Again Twenty Five! number theory	800	x22968
1325A	EhAb AnD gCd constructive algorithms, greedy, number theory	800	x22830
1389A	LCM Problem constructive algorithms, greedy, math, number theory	800	x22750
1388A	Captain Flint and Crew Recruitment brute force, greedy, math, number theory	800	x20292
822A	I'm bored with life implementation, math, number theory	800	x19701
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x19137
1455A	Strange Functions math, number theory	800	x19021
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x12383
664A	Complicated GCD math, number theory	800	x10895
313A	Ilya and Bank Account implementation, number theory	900	x27900
1475A	Odd Divisor math, number theory	900	x23582
1324A	Yet Another Tetris Problem implementation, number theory	900	x19161
1238A	Prime Subtraction math, number theory	900	x16230
1471A	Strange Partition greedy, math, number theory	900	x16204
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x12642
26A	Almost Prime number theory	900	x12607
84A	Toy Army math, number theory	900	x9795
267A	Subtractions math, number theory	900	x3969
122A	Lucky Division brute force, number theory	1000	x59675
577A	Multiplication Table implementation, number theory	1000	x23253
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x20094
1326A	Bad Ugly Numbers constructive algorithms, number theory	1000	x19416
1473B	String LCM brute force, math, number theory, strings	1000	x17335
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x17214
1474B	Different Divisors binary search, constructive algorithms, greedy, math, number theory	1000	x15471
1485A	Add and Divide brute force, greedy, math, number theory	1000	x12236
1245A	Good ol' Numbers Coloring math, number theory	1000	x11445
1411B	Fair Numbers brute force, number theory	1000	x11386
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x10717
1107B	Digital root math, number theory	1000	x10123
17A	Noldbach problem brute force, math, number theory	1000	x7676
299A	Ksusha and Array brute force, number theory, sortings	1000	x4782
177B1	Rectangular Game number theory	1000	x2829
1370B	GCD Compression constructive algorithms, math, number theory	1100	x17506
919B	Perfect Number binary search, brute force, dp, implementation, number theory	1100	x17029
1108B	Divisors of Two Integers brute force, greedy, math, number theory	1100	x15096
483A	Counterexample brute force, implementation, math, number theory	1100	x13388
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x12564
1166B	All the Vowels Please constructive algorithms, math, number theory	1100	x9181
946B	Weird Subtraction Process math, number theory	1100	x8571
758B	Blown Garland brute force, implementation, number theory	1100	x8205
633A	Ebony and Ivory brute force, math, number theory	1100	x8200
898B	Proper Nutrition brute force, implementation, number theory	1100	x7222
630J	Divisibility math, number theory	1100	x7185
797A	k-Factorization implementation, math, number theory	1100	x6984
735B	Urbanization greedy, number theory, sortings	1100	x6889
1033B	Square Difference math, number theory	1100	x6143
858A	k-rounding brute force, math, number theory	1100	x6019
68A	Irrational problem implementation, number theory	1100	x3422
1364A	XXXXX brute force, data structures, number theory, two pointers	1200	x16690
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x15880
456B	Fedya and Maths math, number theory	1200	x11138
1487B	Cat Cycle math, number theory	1200	x10976
1149A	Prefix Sum Primes constructive algorithms, greedy, math, number theory	1200	x10408
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x10379
1277B	Make Them Odd greedy, number theory	1200	x9152
1076B	Divisor Subtraction implementation, math, number theory	1200	x8980
1133B	Preparation for International Women's Day math, number theory	1200	x8610
787A	The Monster brute force, math, number theory	1200	x8365
1068B	LCM math, number theory	1200	x7409
1143B	Nirvana brute force, math, number theory	1200	x7308
660A	Co-prime Array greedy, implementation, math, number theory	1200	x5585
361B	Levko and Permutation constructive algorithms, math, number theory	1200	x5430
817A	Treasure Hunt implementation, math, number theory	1200	x4670
59B	Fortune Telling implementation, number theory	1200	x4245
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x4148
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2111
177B2	Rectangular Game number theory	1200	x2067
230B	T-primes binary search, implementation, math, number theory	1300	x33111
1360D	Buying Shovels math, number theory	1300	x17878
1294C	Product of Three Numbers greedy, math, number theory	1300	x17160
1372B	Omkar and Last Class of Math greedy, math, number theory	1300	x16877
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x15369
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x14622
573A	Bear and Poker implementation, math, number theory	1300	x12092
1407B	Big Vova brute force, greedy, math, number theory	1300	x11867
1454D	Number into Sequence constructive algorithms, math, number theory	1300	x11762
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x9035
1220B	Multiplication Table math, number theory	1300	x8886
271B	Prime Matrix binary search, brute force, math, number theory	1300	x7941
912B	New Year's Eve bitmasks, constructive algorithms, number theory	1300	x7411
236B	Easy Number Challenge implementation, number theory	1300	x7400
870C	Maximum splitting dp, greedy, math, number theory	1300	x7281
1155C	Alarm Clocks Everywhere math, number theory	1300	x7098
371B	Fox Dividing Cheese math, number theory	1300	x6921
876B	Divisiblity of Differences implementation, math, number theory	1300	x6728
1209B	Koala and Lights implementation, math, number theory	1300	x6625
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6346
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x6279
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x6226
900B	Position in Fraction math, number theory	1300	x6212
158D	Ice Sculptures *special problem, brute force, number theory	1300	x5612
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x5177
123A	Prime Permutation implementation, number theory, strings	1300	x2519
1370C	Number Game games, math, number theory	1400	x15033
1285C	Fadi and LCM brute force, math, number theory	1400	x13050
1350B	Orac and Models dp, math, number theory	1400	x13048

←