Problemset - Codeforces

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Codeforces Round 942 (Div. 1)
05:59:31
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Before contest
Codeforces Round 942 (Div. 2)
05:59:31
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number theory

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Problems

#	Name
785D	Anton and School - 2 combinatorics, dp, math, number theory	2300	x2641
776E	The Holmes Children math, number theory	2100	x2100
776B	Sherlock and his girlfriend constructive algorithms, number theory	1200	x19247
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	x1182
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x998
766B	Mahmoud and a Triangle constructive algorithms, geometry, greedy, math, number theory, sortings	1000	x31029
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x80
763C	Timofey and remoduling brute force, implementation, math, number theory	2600	x703
762A	k-th divisor math, number theory	1400	x17899
758F	Geometrical Progression brute force, math, number theory	2400	x616
758B	Blown Garland brute force, implementation, number theory	1100	x10034
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1265
757B	Bash's Big Day greedy, math, number theory	1400	x9797
756F	Long number expression parsing, math, number theory	3400	x89
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x857
755A	PolandBall and Hypothesis brute force, graphs, math, number theory	800	x17502
749A	Bachgold Problem greedy, implementation, math, number theory	800	x46346
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x11816
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x9024
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x39758
735D	Taxes math, number theory	1600	x12621
735B	Urbanization greedy, number theory, sortings	1100	x8298
731F	Video Cards brute force, data structures, implementation, math, number theory	1900	x2750
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x993
724C	Ray Tracing greedy, hashing, implementation, math, number theory, sortings	1800	x2106
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x469
717A	Festival Organization combinatorics, math, number theory	2900	x333
711E	ZS and The Birthday Paradox math, number theory, probabilities	2300	x1239
710D	Two Arithmetic Progressions math, number theory	2500	x1155
707C	Pythagorean Triples math, number theory	1500	x12270
703E	Mishka and Divisors dp, number theory	2600	x585
698F	Coprime Permutation combinatorics, number theory	3000	x428
691F	Couple Cover brute force, dp, number theory	2200	x1245
687B	Remainders Game chinese remainder theorem, math, number theory	1800	x5536
682A	Alyona and Numbers constructive algorithms, math, number theory	1100	x20426
678D	Iterated Linear Function math, number theory	1700	x4264
678C	Joty and Chocolate implementation, math, number theory	1600	x8926
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x662
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x576
665D	Simple Subset constructive algorithms, greedy, number theory	1800	x3198
664A	Complicated GCD math, number theory	800	x17377
660A	Co-prime Array greedy, implementation, math, number theory	1200	x8517
659G	Fence Divercity combinatorics, dp, number theory	2300	x947
653G	Move by Prime combinatorics, math, number theory	3100	x513
645F	Cowslip Collections combinatorics, math, number theory	2500	x757
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x714
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6536
633A	Ebony and Ivory brute force, math, number theory	1100	x12289
632D	Longest Subsequence brute force, math, number theory	2100	x3366
630K	Indivisibility math, number theory	1500	x5021
630J	Divisibility math, number theory	1100	x10667
630A	Again Twenty Five! number theory	800	x61760
626C	Block Towers brute force, greedy, math, number theory	1600	x4286
623B	Array GCD dp, greedy, number theory	2300	x2040
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x5280
616E	Sum of Remainders implementation, math, number theory	2200	x2657
615D	Multipliers math, number theory	2000	x3782
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2534
594D	REQ data structures, number theory	2500	x1505
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1041
585C	Alice, Bob, Oranges and Apples number theory	2400	x961
584D	Dima and Lisa brute force, math, number theory	1800	x8810
582D	Number of Binominal Coefficients dp, math, number theory	3300	x606
582C	Superior Periodic Subarrays number theory	2400	x725
582A	GCD Table constructive algorithms, greedy, number theory	1700	x7536
577A	Multiplication Table implementation, number theory	1000	x37982
576A	Vasya and Petya's Game math, number theory	1500	x13153
575H	Bots combinatorics, dp, math, number theory	1800	x1629
573A	Bear and Poker implementation, math, number theory	1300	x16278
568A	Primes or Palindromes? brute force, implementation, math, number theory	1600	x4998
566F	Clique in the Divisibility Graph dp, math, number theory	1500	x3516
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6131
552C	Vanya and Scales brute force, dp, greedy, math, meet-in-the-middle, number theory	1900	x5381
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1723
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2701
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11201
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x495
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1797
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19318
516E	Drazil and His Happy Friends math, number theory	3100	x471
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7357
500G	New Year Running number theory, trees	3200	x155
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1061
498C	Array and Operations flows, graph matchings, number theory	2100	x3273
495B	Modular Equations math, number theory	1600	x6449
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	x8898
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2509
483A	Counterexample brute force, implementation, math, number theory	1100	x22151
474F	Ant colony data structures, math, number theory	2100	x7658
472A	Design Tutorial: Learn from Math math, number theory	800	x56877
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1384
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12077
456B	Fedya and Maths math, number theory	1200	x15971
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3219
449E	Jzzhu and Squares dp, math, number theory	2900	x281