Problemset - Codeforces

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Codeforces Round 940 (Div. 2) and CodeCraft-23
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Difficulty: —

number theory

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Problems

#	Name
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19193
774G	Perfectionist Arkadiy *special problem, number theory	2700	x173
774F	Pens And Days Of Week *special problem, binary search, number theory	2700	x104
774E	Big Number and Remainder *special problem, math, number theory	2300	x206
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x184
772C	Vulnerable Kerbals constructive algorithms, dp, graphs, math, number theory	2300	x1179
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x996
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x30847
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x79
763C	Timofey and remoduling brute force, implementation, math, number theory	2600	x700
762A	k-th divisor math, number theory	1400	x17837
758F	Geometrical Progression brute force, math, number theory	2400	x613
758B	Blown Garland brute force, implementation, number theory	1100	x10021
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1263
757B	Bash's Big Day greedy, math, number theory	1400	x9781
756F	Long number expression parsing, math, number theory	3400	x88
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x845
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17485
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46214
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11797
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9018
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39613
735D	Taxes math, number theory	1600	x12598
735B	Urbanization greedy, number theory, sortings	1100	x8295
731F	Video Cards brute force, data structures, implementation, math, number theory	1900	x2749
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x989
724C	Ray Tracing greedy, hashing, implementation, math, number theory, sortings	1800	x2098
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x468
717A	Festival Organization combinatorics, math, number theory	2900	x330
711E	ZS and The Birthday Paradox math, number theory, probabilities	2300	x1237
710D	Two Arithmetic Progressions math, number theory	2500	x1150
707C	Pythagorean Triples math, number theory	1500	x12258
703E	Mishka and Divisors dp, number theory	2600	x584
698F	Coprime Permutation combinatorics, number theory	3000	x427
691F	Couple Cover brute force, dp, number theory	2200	x1240
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x5530
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20359
678D	Iterated Linear Function math, number theory	1700	x4260
678C	Joty and Chocolate implementation, math, number theory	1600	x8920
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x659
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x574
665D	Simple Subset constructive algorithms, greedy, number theory	1800	x3183
664A	Complicated GCD math, number theory	800	x17318
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8501
659G	Fence Divercity combinatorics, dp, number theory	2300	x946
653G	Move by Prime combinatorics, math, number theory	3100	x512
645F	Cowslip Collections combinatorics, math, number theory	2500	x756
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x709
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6522
633A	Ebony and Ivory brute force, math, number theory	1100	x12268
632D	Longest Subsequence brute force, math, number theory	2100	x3352
630K	Indivisibility math, number theory	1500	x5010
630J	Divisibility math, number theory	1100	x10640
630A	Again Twenty Five! number theory	800	x61316
626C	Block Towers brute force, greedy, math, number theory	1600	x4284
623B	Array GCD dp, greedy, number theory	2300	x2037
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x5274
616E	Sum of Remainders implementation, math, number theory	2200	x2646
615D	Multipliers math, number theory	2000	x3777
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2533
594D	REQ data structures, number theory	2500	x1501
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1039
585C	Alice, Bob, Oranges and Apples number theory	2400	x960
584D	Dima and Lisa brute force, math, number theory	1800	x8785
582D	Number of Binominal Coefficients dp, math, number theory	3300	x602
582C	Superior Periodic Subarrays number theory	2400	x723
582A	GCD Table constructive algorithms, greedy, number theory	1700	x7524
577A	Multiplication Table implementation, number theory	1000	x37878
576A	Vasya and Petya's Game math, number theory	1500	x13128
575H	Bots combinatorics, dp, math, number theory	1800	x1627
573A	Bear and Poker implementation, math, number theory	1300	x16259
568A	Primes or Palindromes? brute force, implementation, math, number theory	1600	x4998
566F	Clique in the Divisibility Graph dp, math, number theory	1500	x3510
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6122
552C	Vanya and Scales brute force, dp, greedy, math, meet-in-the-middle, number theory	1900	x5379
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1721
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2690
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11170
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x493
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1790
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19300
516E	Drazil and His Happy Friends math, number theory	3100	x469
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7355
500G	New Year Running number theory, trees	3200	x154
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1059
498C	Array and Operations flows, graph matchings, number theory	2100	x3269
495B	Modular Equations math, number theory	1600	x6431
490D	Chocolate brute force, dfs and similar, math, meet-in-the-middle, number theory	1900	x2069
490C	Hacking Cypher brute force, math, number theory, strings	1700	x8888
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2501
483A	Counterexample brute force, implementation, math, number theory	1100	x22092
474F	Ant colony data structures, math, number theory	2100	x7601
472A	Design Tutorial: Learn from Math math, number theory	800	x56704
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1380
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12065
456B	Fedya and Maths math, number theory	1200	x15945
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3207
449E	Jzzhu and Squares dp, math, number theory	2900	x280
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2191
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1443