Problemset - Codeforces

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Codeforces Round 968 (Div. 2)
37:27:38
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Problems

#	Name
1561D1	Up the Strip (simplified version) brute force, data structures, dp, math, number theory	1700	x5563
1560D	Make a Power of Two greedy, math, strings	1300	x18071
1560C	Infinity Table implementation, math	800	x26491
1560B	Who's Opposite? math	800	x35365
1559E	Mocha and Stars combinatorics, dp, fft, math, number theory	2200	x2280
1559A	Mocha and Math bitmasks, constructive algorithms, math	900	x30637
1558B	Up the Strip brute force, dp, math, number theory, two pointers	1900	x4747
1558A	Charmed by the Game brute force, math	1300	x11026
1557C	Moamen and XOR bitmasks, combinatorics, dp, math, matrices	1700	x8539
1557A	Ezzat and Two Subsequences brute force, math, sortings	800	x27813
1556H	DIY Tree graphs, greedy, math, probabilities	3300	x364
1556F	Sports Betting bitmasks, combinatorics, dp, graphs, math, probabilities	2500	x1212
1556D	Take a Guess bitmasks, constructive algorithms, interactive, math	1800	x6812
1556A	A Variety of Operations math	800	x18032
1555A	PizzaForces brute force, math	900	x27861
1554E	You dfs and similar, dp, math, number theory	2600	x1210
1554B	Cobb bitmasks, brute force, greedy, math	1700	x12686
1553I	Stairs combinatorics, divide and conquer, dp, fft, math	3400	x203
1553G	Common Divisor Graph brute force, constructive algorithms, dsu, graphs, hashing, math, number theory	2700	x1012
1553F	Pairwise Modulo data structures, math	2300	x2211
1553E	Permutation Shift brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math	2100	x3300
1553A	Digits Sum math, number theory	800	x30768
1552I	Organizing a Music Festival dfs and similar, math	3400	x125
1552D	Array Differentiation bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math	1800	x6924
1551D2	Domino (hard version) constructive algorithms, implementation, math	2100	x2728
1551D1	Domino (easy version) constructive algorithms, math	1700	x7015
1551A	Polycarp and Coins greedy, math	800	x50151
1550D	Excellent Arrays binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers	2300	x1827
1550B	Maximum Cost Deletion greedy, math	1000	x26218
1550A	Find The Array greedy, math	800	x27977
1549A	Gregor and Cryptography math, number theory	800	x32164
1548E	Gregor and the Two Painters data structures, divide and conquer, graphs, greedy, math	3400	x422
1548D2	Gregor and the Odd Cows (Hard) brute force, geometry, math, number theory	3300	x240
1548D1	Gregor and the Odd Cows (Easy) bitmasks, geometry, math, number theory	2300	x1446
1548C	The Three Little Pigs combinatorics, dp, fft, math	2500	x1812
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x9671
1547A	Shortest Path with Obstacle implementation, math	800	x30291
1546B	AquaMoon and Stolen String interactive, math	1200	x13022
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x474
1545B	AquaMoon and Chess combinatorics, math	1900	x5879
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x401
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2001
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x7557
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5259
1543B	Customising the Track combinatorics, greedy, math	900	x22967
1543A	Exciting Bets greedy, math, number theory	900	x27683
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x840
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1223
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2589
1542C	Strange Function math, number theory	1600	x14028
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x22822
1542A	Odd Set math	800	x44153
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x27904
1540E	Tasty Dishes math, matrices	3500	x103
1540C2	Converging Array (Hard Version) dp, math	2900	x452
1540C1	Converging Array (Easy Version) dp, math	2700	x611
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2549
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x19957
1538G	Gift Set binary search, greedy, math, ternary search	2100	x4497
1538F	Interesting Function binary search, dp, math, number theory	1500	x19041
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x13476
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x28085
1538B	Friends and Candies greedy, math	800	x31535
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2447
1537D	Deleting Divisors games, math, number theory	1700	x12235
1537C	Challenging Cliffs constructive algorithms, greedy, implementation, math	1200	x27253
1537B	Bad Boy constructive algorithms, greedy, math	900	x29355
1537A	Arithmetic Array greedy, math	800	x36883
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x934
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2382
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x30263
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x12723
1534B	Histogram Ugliness greedy, implementation, math	1100	x12465
1533A	Travel to Bertown *special problem, implementation, math		x1073
1532B	Frog Jumping *special problem, math		x822
1530F	Bingo bitmasks, combinatorics, dp, math, probabilities	2600	x772
1530D	Secret Santa constructive algorithms, flows, graphs, greedy, math	1600	x9125
1530A	Binary Decimal greedy, math	800	x21006
1529B	Sifid and Strange Subsequences greedy, math, sortings	1100	x20509
1529A	Eshag Loves Big Arrays constructive algorithms, greedy, math	800	x29652
1528F	AmShZ Farm combinatorics, fft, math	3300	x284
1528B	Kavi on Pairing Duty combinatorics, dp, math	1700	x8628
1527D	MEX Tree combinatorics, dfs and similar, implementation, math, trees	2400	x1883
1527C	Sequence Pair Weight hashing, implementation, math	1600	x13418
1526E	Oolimry and Suffix Array combinatorics, constructive algorithms, math	2400	x1044
1526D	Kill Anton brute force, constructive algorithms, data structures, math, strings	2200	x2393
1526B	I Hate 1111 dp, math, number theory	1400	x30071
1525E	Assimilation IV combinatorics, dp, math, probabilities, two pointers	2100	x2031
1525A	Potion-making math, number theory	800	x25282
1523E	Crypto Lights combinatorics, dp, math, probabilities	2600	x1628
1521B	Nastia and a Good Array constructive algorithms, math, number theory	1300	x21188
1521A	Nastia and Nearly Good Numbers constructive algorithms, math, number theory	1000	x36610
1520E	Arranging The Sheep greedy, math	1400	x21018
1520D	Same Differences data structures, hashing, math	1200	x45817
1520B	Ordinary Numbers brute force, math, number theory	800	x43978
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15041
1519B	The Cake Is a Lie dp, math	800	x30624
1519A	Red and Blue Beans math	800	x28618
1517A	Sum of 2050 greedy, math	800	x25427
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x850