Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 941 (Div. 1)
41:15:05
Register now »

*has extra registration

Before contest
Codeforces Round 941 (Div. 2)
41:15:05
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6531
630F	Selection of Personnel combinatorics, math	1300	x6543
955A	Feed the cat greedy, math	1100	x6545
1846E2	Rudolf and Snowflakes (hard version) binary search, brute force, implementation, math	1800	x6551
1119C	Ramesses and Corner Inversion constructive algorithms, greedy, implementation, math	1500	x6556
1656D	K-good constructive algorithms, math, number theory	1900	x6574
808B	Average Sleep Time data structures, implementation, math	1300	x6577
1091D	New Year and the Permutation Concatenation combinatorics, dp, math	1700	x6582
1141E	Superhero Battle math	1700	x6588
1932E	Final Countdown implementation, math, number theory	1600	x6596
1833F	Ira and Flamenco combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers	1700	x6616
1068A	Birthday math	1400	x6624
1854A2	Dual (Hard Version) constructive algorithms, math	1900	x6647
908C	New Year and Curling brute force, geometry, implementation, math	1500	x6659
518D	Ilya and Escalator combinatorics, dp, math, probabilities	1700	x6668
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6673
1787C	Remove the Bracket dp, greedy, math	1600	x6674
1889B	Doremy's Connecting Plan constructive algorithms, greedy, math, sortings	1700	x6685
1621C	Hidden Permutations dfs and similar, interactive, math	1700	x6719
1158A	The Party and Sweets binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers	1500	x6724
859B	Lazy Security Guard brute force, geometry, math	1000	x6734
148D	Bag of mice dp, games, math, probabilities	1800	x6735
614B	Gena's Code implementation, math	1400	x6758
484B	Maximum Value binary search, math, sortings, two pointers	2100	x6767
1690F	Shifting String graphs, math, number theory, strings	1700	x6768
818A	Diplomas and Certificates implementation, math	800	x6772
988D	Points and Powers of Two brute force, math	1800	x6773
937B	Vile Grasshoppers brute force, math, number theory	1400	x6784
761B	Dasha and friends brute force, implementation, math	1300	x6799
612B	HDD is Outdated Technology implementation, math	1200	x6814
967B	Watering System math, sortings	1000	x6819
765C	Table Tennis Game 2 math	1200	x6825
1551D1	Domino (easy version) constructive algorithms, math	1700	x6830
1758D	Range = √Sum binary search, brute force, constructive algorithms, math, two pointers	1800	x6840
131B	Opposites Attract implementation, math	1200	x6856
1491D	Zookeeper and The Infinite Zoo bitmasks, constructive algorithms, dp, greedy, math	1800	x6869
727C	Guess the Array constructive algorithms, interactive, math	1400	x6881
1618E	Singers' Tour constructive algorithms, math	1700	x6932
1466E	Apollo versus Pan bitmasks, brute force, math	1800	x6932
1159B	Expansion coefficient of the array implementation, math	1300	x6940
569B	Inventory greedy, math	1200	x6945
630B	Moore's Law math	1200	x6952
840A	Leha and Function combinatorics, greedy, math, number theory, sortings	1300	x6953
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x6961
1660F1	Promising String (easy version) brute force, implementation, math, strings	1700	x6961
1059C	Sequence Transformation constructive algorithms, math	1600	x6970
1644D	Cross Coloring data structures, implementation, math	1700	x6975
1331B	Limericks *special problem, math, number theory		x6975
844B	Rectangles combinatorics, math	1300	x6977
1081C	Colorful Bricks combinatorics, dp, math	1500	x6981
1829H	Don't Blame Me bitmasks, combinatorics, dp, math	1700	x6997
1811D	Umka and a Long Flight constructive algorithms, implementation, math	1600	x7002
1316C	Primitive Primes constructive algorithms, math, ternary search	1800	x7006
817C	Really Big Numbers binary search, brute force, dp, math	1600	x7007
995B	Suit and Tie greedy, implementation, math	1400	x7008
1040B	Shashlik Cooking dp, greedy, math	1300	x7009
1692H	Gambling data structures, dp, greedy, math	1700	x7021
1810D	Climbing the Tree binary search, math	1700	x7047
557B	Pasha and Tea constructive algorithms, implementation, math, sortings	1500	x7075
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7077
1029C	Maximal Intersection greedy, math, sortings	1600	x7092
1238C	Standard Free2play dp, greedy, math	1600	x7095
267A	Subtractions math, number theory	900	x7119
1185C2	Exam in BerSU (hard version) brute force, data structures, greedy, math	1700	x7135
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1500	x7135
1866B	Battling with Numbers combinatorics, math, number theory	1400	x7163
1806C	Sequence Master brute force, constructive algorithms, math	1600	x7167
785C	Anton and Fairy Tale binary search, math	1600	x7170
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7204
1426E	Rock, Paper, Scissors brute force, constructive algorithms, flows, greedy, math	1800	x7211
1114C	Trailing Loves (or L'oeufs?) brute force, implementation, math, number theory	1700	x7238
581C	Developing Skills implementation, math, sortings	1400	x7239
1841C	Ranom Numbers brute force, dp, greedy, math, strings	1800	x7263
675B	Restoring Painting brute force, constructive algorithms, math	1400	x7280
1845D	Rating System binary search, brute force, data structures, dp, dsu, greedy, math, two pointers	1800	x7281
233B	Non-square Equation binary search, brute force, math	1400	x7293
13A	Numbers implementation, math	1000	x7309
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7331
1637D	Yet Another Minimization Problem dp, greedy, math	1800	x7347
1928C	Physical Education Lesson brute force, math, number theory	1600	x7358
1225D	Power Products hashing, math, number theory	1800	x7364
1360G	A/B Matrix constructive algorithms, greedy, math	1900	x7371
1835A	k-th equality brute force, implementation, math	1700	x7398
1244C	The Football Season brute force, math, number theory	2000	x7409
340A	The Wall math	1200	x7413
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7422
1064B	Equations of Mathematical Magic math	1200	x7442
612C	Replace To Make Regular Bracket Sequence data structures, expression parsing, math	1400	x7486
677B	Vanya and Food Processor implementation, math	1400	x7522
1852A	Ntarsis' Set binary search, math, number theory	1800	x7526
603A	Alternative Thinking dp, greedy, math	1600	x7531
150A	Win or Freeze games, math, number theory	1400	x7559
888D	Almost Identity Permutations combinatorics, dp, math	1600	x7587
900B	Position in Fraction math, number theory	1300	x7620
474F	Ant colony data structures, math, number theory	2100	x7622
1195D1	Submarine in the Rybinsk Sea (easy edition) combinatorics, math, number theory	1500	x7659
1777C	Quiz Master binary search, math, number theory, sortings, two pointers	1700	x7666
303A	Lucky Permutation Triple constructive algorithms, implementation, math	1300	x7675
1349B	Orac and Medians constructive algorithms, greedy, math	2000	x7690
1284C	New Year and Permutation combinatorics, math	1600	x7702