Problemset - Codeforces

→ Pay attention

Before contest
Codeforces Round 973 (Div. 2)
3 days
Register now »

*has extra registration

→ Filter Problems

Difficulty: —

math

Add tag

Problems

#	Name
1363D	Guess The Maximums binary search, implementation, interactive, math	2100	x4073
1363A	Odd Selection brute force, implementation, math	1200	x35685
1362C	Johnny and Another Rating Drop bitmasks, greedy, math	1400	x18224
1361F	Johnny and New Toy data structures, implementation, math	3300	x154
1361D	Johnny and James greedy, implementation, math, trees	2900	x317
1361B	Johnny and Grandmaster greedy, implementation, math, sortings	1900	x3617
1360G	A/B Matrix constructive algorithms, greedy, math	1900	x7729
1360D	Buying Shovels math, number theory	1300	x32907
1360A	Minimal Square greedy, math	800	x50329
1359F	RC Kaboom Show binary search, brute force, data structures, geometry, math	2900	x537
1359E	Modular Stability combinatorics, math, number theory	2000	x6096
1359C	Mixing Water binary search, math	1700	x13790
1359A	Berland Poker brute force, greedy, math	1000	x29557
1358C	Celex Update math	1600	x17341
1358A	Park Lighting greedy, math	800	x39296
1355E	Restorer Distance binary search, greedy, math, sortings, ternary search	2100	x5104
1355D	Game With Array constructive algorithms, math	1400	x17980
1355C	Count Triangles binary search, implementation, math, two pointers	1800	x10622
1355A	Sequence with Digits brute force, implementation, math	1200	x26491
1354C2	Not So Simple Polygon Embedding binary search, brute force, geometry, math	2000	x6066
1354C1	Simple Polygon Embedding binary search, geometry, math, ternary search	1400	x15667
1354A	Alarm Clock math	900	x23747
1353C	Board Moves math	1000	x35314
1353A	Most Unstable Array constructive algorithms, greedy, math	800	x40534
1352F	Binary String Reconstruction constructive algorithms, dfs and similar, math	1500	x17054
1352C	K-th Not Divisible by n binary search, math	1200	x53968
1352B	Same Parity Summands constructive algorithms, math	1200	x37400
1352A	Sum of Round Numbers implementation, math	800	x78688
1351B	Square? brute force, implementation, math	900	x16938
1350B	Orac and Models dp, math, number theory	1400	x22042
1350A	Orac and Factors math	900	x26050
1349F2	Slime and Sequences (Hard Version) dp, fft, math	3500	x112
1349F1	Slime and Sequences (Easy Version) dp, fft, math	3100	x412
1349D	Slime and Biscuits math, probabilities	3200	x902
1349B	Orac and Medians constructive algorithms, greedy, math	2000	x8130
1349A	Orac and LCM data structures, math, number theory	1600	x16967
1348E	Phoenix and Berries brute force, dp, greedy, math	2400	x2214
1348D	Phoenix and Science binary search, constructive algorithms, greedy, implementation, math	1900	x8835
1348A	Phoenix and Balance greedy, math	800	x39374
1346G	Two IP Cameras *special problem, math, number theory	2300	x135
1346F	Dune II: Battle For Arrakis *special problem, data structures, greedy, math	2000	x228
1346A	Color Revolution *special problem, math	1000	x2029
1345B	Card Constructions binary search, brute force, dp, math	1100	x26357
1345A	Puzzle Pieces math	800	x24148
1344D	Résumé Review binary search, greedy, math	2700	x1159
1344C	Quantifier Question dfs and similar, dp, graphs, math	2600	x1857
1344A	Hilbert's Hotel math, number theory, sortings	1600	x15614
1343B	Balanced Array constructive algorithms, math	800	x56249
1343A	Candies brute force, math	900	x47748
1342E	Placing Rooks combinatorics, fft, math	2300	x3071
1342C	Yet Another Counting Problem math, number theory	1600	x13999
1342A	Road To Zero greedy, math	1000	x40149
1341A	Nastya and Rice math	900	x28985
1339A	Filling Diamonds brute force, dp, implementation, math	900	x31903
1338D	Nested Rubber Bands constructive algorithms, dfs and similar, dp, math, trees	2700	x1009
1338C	Perfect Triples bitmasks, brute force, constructive algorithms, divide and conquer, math	2200	x3212
1338B	Edge Weight Assignment bitmasks, constructive algorithms, dfs and similar, greedy, math, trees	1800	x8440
1338A	Powered Addition greedy, math	1500	x23856
1337B	Kana and Dragon Quest game greedy, implementation, math	900	x34105
1337A	Ichihime and Triangle constructive algorithms, math	800	x38084
1336E2	Chiori and Doll Picking (hard version) bitmasks, brute force, combinatorics, math	3500	x304
1336E1	Chiori and Doll Picking (easy version) bitmasks, brute force, combinatorics, math	2700	x684
1336B	Xenia and Colorful Gems binary search, greedy, math, sortings, two pointers	1700	x11355
1335A	Candies and Two Sisters math	800	x83663
1334E	Divisor Paths combinatorics, graphs, greedy, math, number theory	2200	x2817
1334C	Circle of Monsters brute force, constructive algorithms, greedy, math	1600	x16562
1334A	Level Statistics implementation, math	1200	x23198
1333F	Kate and imperfection greedy, implementation, math, number theory, sortings, two pointers	2200	x4250
1332E	Height All the Same combinatorics, constructive algorithms, math, matrices	2100	x3832
1332D	Walk on Matrix bitmasks, constructive algorithms, math	1700	x8173
1332B	Composite Coloring brute force, constructive algorithms, greedy, math, number theory	1400	x17559
1332A	Exercising Walk greedy, implementation, math	1100	x19391
1331B	Limericks *special problem, math, number theory		x6999
1330B	Dreamoon Likes Permutations implementation, math	1400	x14009
1329B	Dreamoon Likes Sequences bitmasks, combinatorics, math	1700	x6679
1329A	Dreamoon Likes Coloring constructive algorithms, greedy, implementation, math	1800	x9095
1328D	Carousel constructive algorithms, dp, graphs, greedy, math	1800	x13131
1328B	K-th Beautiful String binary search, brute force, combinatorics, implementation, math	1300	x29014
1328A	Divisibility Problem math	800	x100336
1327E	Count The Blocks combinatorics, dp, math	1800	x8925
1327D	Infinite Path brute force, dfs and similar, graphs, math, number theory	2200	x3261
1327A	Sum of Odd Integers math	1100	x38668
1326F2	Wise Men (Hard Version) bitmasks, dp, math	3200	x483
1326C	Permutation Partitions combinatorics, greedy, math	1300	x15616
1326B	Maximums implementation, math	900	x23998
1322C	Instant Noodles graphs, hashing, math, number theory	2300	x2418
1322B	Present binary search, bitmasks, constructive algorithms, data structures, math, sortings	2100	x4200
1320A	Journey Planning data structures, dp, greedy, math, sortings	1400	x16295
1316C	Primitive Primes constructive algorithms, math, ternary search	1800	x7273
1313B	Different Rules constructive algorithms, greedy, implementation, math	1700	x6667
1312D	Count the Arrays combinatorics, math	1700	x9440
1312C	Adding Powers bitmasks, greedy, implementation, math, number theory, ternary search	1400	x16479
1312A	Two Regular Polygons geometry, greedy, math, number theory	800	x25876
1311D	Three Integers brute force, math	2000	x9034
1311A	Add Odd or Subtract Even greedy, implementation, math	800	x41775
1310F	Bad Cryptography math, number theory	3400	x74
1307E	Cow and Treats binary search, combinatorics, dp, greedy, implementation, math	2500	x1276
1307C	Cow and Message brute force, dp, math, strings	1500	x11799
1307B	Cow and Friend geometry, greedy, math	1300	x13229
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x2643