Problemset - Codeforces

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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
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number theory

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Problems

#	Name
645F	Cowslip Collections combinatorics, math, number theory	2500	x797
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x782
633B	A Trivial Problem brute force, constructive algorithms, math, number theory	1300	x6711
633A	Ebony and Ivory brute force, math, number theory	1100	x12865
632D	Longest Subsequence brute force, math, number theory	2100	x3806
630K	Indivisibility math, number theory	1500	x5379
630J	Divisibility math, number theory	1100	x11193
630A	Again Twenty Five! number theory	800	x69793
626C	Block Towers brute force, greedy, math, number theory	1600	x4356
623B	Array GCD dp, greedy, number theory	2300	x2163
621C	Wet Shark and Flowers combinatorics, math, number theory, probabilities	1700	x5582
616E	Sum of Remainders implementation, math, number theory	2200	x2983
615D	Multipliers math, number theory	2000	x3939
603B	Moodular Arithmetic combinatorics, dfs and similar, dsu, math, number theory	1800	x2589
594D	REQ data structures, number theory	2500	x1637
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x1114
585C	Alice, Bob, Oranges and Apples number theory	2400	x988
584D	Dima and Lisa brute force, math, number theory	1800	x9471
582D	Number of Binominal Coefficients dp, math, number theory	3300	x658
582C	Superior Periodic Subarrays number theory	2400	x746
582A	GCD Table constructive algorithms, greedy, number theory	1700	x7821
577A	Multiplication Table implementation, number theory	1000	x40201
576A	Vasya and Petya's Game math, number theory	1500	x14042
575H	Bots combinatorics, dp, math, number theory	1800	x1692
573A	Bear and Poker implementation, math, number theory	1300	x16727
568A	Primes or Palindromes? brute force, implementation, math, number theory	1600	x5118
566F	Clique in the Divisibility Graph dp, math, number theory	1500	x3652
559C	Gerald and Giant Chess combinatorics, dp, math, number theory	2200	x6587
552C	Vanya and Scales brute force, dp, greedy, math, meet-in-the-middle, number theory	1900	x5494
551D	GukiZ and Binary Operations combinatorics, implementation, math, matrices, number theory	2100	x1967
547C	Mike and Foam bitmasks, combinatorics, dp, math, number theory	2300	x2901
546D	Soldier and Number Game constructive algorithms, dp, math, number theory	1700	x11978
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x514
520E	Pluses everywhere combinatorics, dp, math, number theory	2200	x1882
519C	A and B and Team Training greedy, implementation, math, number theory	1300	x19778
516E	Drazil and His Happy Friends math, number theory	3100	x505
515B	Drazil and His Happy Friends brute force, dsu, meet-in-the-middle, number theory	1300	x7465
500G	New Year Running number theory, trees	3200	x157
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1126
498C	Array and Operations flows, graph matchings, number theory	2100	x3494
495B	Modular Equations math, number theory	1600	x7018
490D	Chocolate brute force, dfs and similar, math, meet-in-the-middle, number theory	1900	x2144
490C	Hacking Cypher brute force, math, number theory, strings	1700	x9107
487C	Prefix Product Sequence constructive algorithms, math, number theory	2300	x2795
483A	Counterexample brute force, implementation, math, number theory	1100	x23234
474F	Ant colony data structures, math, number theory	2100	x8834
472A	Design Tutorial: Learn from Math math, number theory	800	x60750
463E	Caisa and Tree brute force, dfs and similar, math, number theory, trees	2100	x1617
460B	Little Dima and Equation brute force, implementation, math, number theory	1500	x12429
456B	Fedya and Maths math, number theory	1200	x16852
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x3670
449E	Jzzhu and Squares dp, math, number theory	2900	x285
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2282
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1543
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3372
439C	Devu and Partitioning of the Array brute force, constructive algorithms, implementation, number theory	1700	x3935
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x1894
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x22597
414A	Mashmokh and Numbers constructive algorithms, number theory	1500	x9851
402D	Upgrading Array dp, greedy, math, number theory	1800	x2625
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4198
396B	On Sum of Fractions math, number theory		x1079
396A	On Number of Decompositions into Multipliers combinatorics, math, number theory		x1517
385C	Bear and Prime Numbers binary search, brute force, data structures, dp, implementation, math, number theory	1700	x9714
375A	Divisible by Seven math, number theory	1600	x4863
371B	Fox Dividing Cheese math, number theory	1300	x11472
364C	Beautiful Set brute force, number theory	2300	x599
361B	Levko and Permutation constructive algorithms, math, number theory	1200	x8092
360D	Levko and Sets number theory	2600	x406
359C	Prime Number math, number theory	1900	x3148
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x3083
353C	Find Maximum implementation, math, number theory	1600	x4916
348B	Apple Tree dfs and similar, number theory, trees	2100	x2103
346E	Doodle Jump math, number theory	3000	x265
346A	Alice and Bob games, math, number theory	1600	x8718
343A	Rational Resistance math, number theory	1600	x8780
338D	GCD Table chinese remainder theorem, math, number theory	2900	x1171
337E	Divisor Tree brute force, number theory, trees	2200	x1026
337C	Quiz binary search, greedy, math, matrices, number theory	1600	x4905
337B	Routine Problem greedy, math, number theory	1400	x9393
336D	Vasily the Bear and Beautiful Strings combinatorics, math, number theory	2100	x1013
336C	Vasily the Bear and Sequence brute force, greedy, implementation, number theory	1800	x2472
313A	Ilya and Bank Account implementation, number theory	900	x56851
306C	White, Black and White Again combinatorics, number theory	2100	x486
303D	Rotatable Number math, number theory	2600	x298
303C	Minimum Modular brute force, graphs, math, number theory	2400	x892
300E	Empire Strikes Back binary search, math, number theory	2300	x1047
299A	Ksusha and Array brute force, number theory, sortings	1000	x8135
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x363
294C	Shaass and Lights combinatorics, number theory	1900	x3837
293C	Cube Problem brute force, math, number theory	2400	x576
284A	Cows and Primitive Roots implementation, math, number theory	1400	x6609
283D	Cows and Cool Sequences dp, math, number theory	2400	x543
279E	Beautiful Decomposition dp, games, greedy, number theory	1900	x1449
271E	Three Horses constructive algorithms, math, number theory	2200	x505
271B	Prime Matrix binary search, brute force, math, number theory	1300	x13214
267A	Subtractions math, number theory	900	x7577
264B	Good Sequences dp, number theory	1500	x10370
251C	Number Transformation dp, greedy, number theory	2000	x1036
248B	Chilly Willy math, number theory	1400	x5346