Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
2 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

number theory

Add tag

Problems

#	Name
757B	Bash's Big Day greedy, math, number theory	1400	x9781
1005D	Polycarp and Div 3 dp, greedy, number theory	1500	x9777
1091C	New Year and the Sphere Transmission math, number theory	1400	x9733
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x9665
414A	Mashmokh and Numbers constructive algorithms, number theory	1500	x9618
1200C	Round Corridor math, number theory	1400	x9581
264B	Good Sequences dp, number theory	1500	x9574
891A	Pride brute force, dp, greedy, math, number theory	1500	x9562
1485C	Floor and Mod binary search, brute force, math, number theory	1700	x9493
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x9447
385C	Bear and Prime Numbers binary search, brute force, data structures, dp, implementation, math, number theory	1700	x9344
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x9342
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9235
898B	Proper Nutrition brute force, implementation, number theory	1100	x9233
1033B	Square Difference math, number theory	1100	x9131
1469D	Ceil Divisions brute force, constructive algorithms, math, number theory	1700	x9124
337B	Routine Problem greedy, math, number theory	1400	x9070
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9018
1155C	Alarm Clocks Everywhere math, number theory	1300	x8977
870C	Maximum splitting dp, greedy, math, number theory	1300	x8948
1771C	Hossam and Trainees greedy, math, number theory	1600	x8925
678C	Joty and Chocolate implementation, math, number theory	1600	x8920
1110C	Meaningless Operations constructive algorithms, math, number theory	1500	x8904
490C	Hacking Cypher brute force, math, number theory, strings	1700	x8888
1731C	Even Subarrays bitmasks, brute force, hashing, math, number theory	1700	x8869
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x8831
1612D	X-Magic Pair math, number theory	1600	x8798
584D	Dima and Lisa brute force, math, number theory	1800	x8785
1228C	Primes and Multiplication math, number theory	1700	x8669
876B	Divisiblity of Differences implementation, math, number theory	1300	x8667
1907E	Good Triples brute force, combinatorics, number theory	1600	x8626
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8501
343A	Rational Resistance math, number theory	1600	x8490
346A	Alice and Bob games, math, number theory	1600	x8436
1062B	Math greedy, math, number theory	1500	x8381
1295D	Same GCDs math, number theory	1800	x8374
1061C	Multiplicity data structures, dp, implementation, math, number theory	1700	x8311
735B	Urbanization greedy, number theory, sortings	1100	x8295
1766D	Lucky Chains math, number theory	1600	x8287
1034A	Enlarge GCD number theory	1800	x8268
1770C	Koxia and Number Theory brute force, chinese remainder theorem, math, number theory	1700	x8230
1732D1	Balance (Easy version) brute force, data structures, implementation, number theory	1500	x8205
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8008
1209B	Koala and Lights implementation, math, number theory	1300	x7930
1702F	Equate Multisets constructive algorithms, data structures, greedy, math, number theory	1700	x7881
361B	Levko and Permutation constructive algorithms, math, number theory	1200	x7870
1260C	Infinite Fence greedy, math, number theory	1700	x7858
858A	k-rounding brute force, math, number theory	1100	x7835
1627D	Not Adding brute force, dp, math, number theory	1900	x7788
1512G	Short Task brute force, dp, math, number theory	1700	x7765
1025B	Weakened Common Divisor brute force, greedy, number theory	1600	x7746
1798C	Candy Store greedy, math, number theory	1700	x7729
299A	Ksusha and Array brute force, number theory, sortings	1000	x7692
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7657
1113B	Sasha and Magnetic Machines greedy, number theory	1300	x7656
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7648
900B	Position in Fraction math, number theory	1300	x7614
474F	Ant colony data structures, math, number theory	2100	x7602
150A	Win or Freeze games, math, number theory	1400	x7554
582A	GCD Table constructive algorithms, greedy, number theory	1700	x7524
1852A	Ntarsis' Set binary search, math, number theory	1800	x7493
1244C	The Football Season brute force, math, number theory	2000	x7396
1876B	Effects of Anti Pimples combinatorics, number theory, sortings	1500	x7391
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7355
1225D	Power Products hashing, math, number theory	1800	x7352
1928C	Physical Education Lesson brute force, math, number theory	1600	x7283
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7176
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7142
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1500	x7133
267A	Subtractions math, number theory	900	x7069
1331B	Limericks *special problem, math, number theory		x6971
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6952
922C	Cave Painting brute force, number theory	1600	x6827
937B	Vile Grasshoppers brute force, math, number theory	1400	x6780
1690F	Shifting String graphs, math, number theory, strings	1700	x6759
1706D1	Chopping Carrots (Easy Version) binary search, brute force, constructive algorithms, greedy, number theory	1700	x6638
59B	Fortune Telling implementation, number theory	1200	x6630
1656D	K-good constructive algorithms, math, number theory	1900	x6564
1932E	Final Countdown implementation, math, number theory	1600	x6523
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6522
986A	Fair graphs, greedy, number theory, shortest paths	1600	x6505
495B	Modular Equations math, number theory	1600	x6431
1152C	Neko does Maths brute force, math, number theory	1800	x6428
1822G1	Magic Triples (Easy Version) brute force, data structures, math, number theory	1700	x6413
1475G	Strange Beauty dp, math, number theory, sortings	1900	x6367
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6358
71C	Round Table Knights dp, math, number theory	1600	x6205
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6168
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x6167
1470B	Strange Definition bitmasks, graphs, hashing, math, number theory	1900	x6128
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6122
992B	Nastya Studies Informatics math, number theory	1600	x6072
817A	Treasure Hunt implementation, math, number theory	1200	x6048
833A	The Meaningless Game math, number theory	1700	x6009
1505B	DMCA *special problem, implementation, number theory	1600	x5982
1635D	Infinite Set bitmasks, dp, math, matrices, number theory, strings	1800	x5972
1848C	Vika and Price Tags math, number theory	1800	x5900
1184A1	Heidi Learns Hashing (Easy) brute force, math, number theory	1200	x5810
1775D	Friendly Spiders dfs and similar, graphs, math, number theory, shortest paths	1800	x5722
1359E	Modular Stability combinatorics, math, number theory	2000	x5716