Problemset - Codeforces

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Codeforces Round (Div. 2)
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Problems

#	Name
1992G	Ultra-Meow combinatorics, math, number theory	2000	x1174
1992E	Novice's Mistake brute force, constructive algorithms, math, strings	1700	x5370
1992C	Gorilla and Permutation constructive algorithms, math	900	x21172
1992B	Angry Monk greedy, math, sortings	800	x24464
1992A	Only Pluses brute force, constructive algorithms, greedy, math, sortings	800	x28580
1989E	Distance to Different combinatorics, dp, math	2300	x1370
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x4484
1989C	Two Movies greedy, math	1400	x14161
1987A	Upload More RAM greedy, math	800	x20854
1986G2	Permutation Problem (Hard Version) brute force, data structures, hashing, math, number theory	2500	x780
1986G1	Permutation Problem (Simple Version) binary search, brute force, combinatorics, data structures, math, number theory	2200	x1120
1986E	Beautiful Array greedy, math, number theory, sortings	1700	x6982
1986D	Mathematical Problem brute force, dp, greedy, implementation, math, two pointers	1400	x12677
1986A	X Axis brute force, geometry, math, sortings	800	x34769
1985G	D-Function combinatorics, math, number theory	1600	x7498
1985E	Secret Box brute force, combinatorics, math	1200	x17125
1985D	Manhattan Circle implementation, math	900	x29905
1985B	Maximum Multiple Sum brute force, math, number theory	800	x39150
1984F	Reconstruction brute force, dp, math	2500	x774
1984D	''a'' String Problem brute force, hashing, implementation, math, string suffix structures, strings	2000	x2759
1984C2	Magnitude (Hard Version) combinatorics, dp, greedy, math	1700	x6304
1984C1	Magnitude (Easy Version) dp, greedy, math	1300	x14061
1984B	Large Addition implementation, math	1100	x16141
1983E	I Love Balls combinatorics, fft, math, number theory, probabilities	2300	x1447
1983D	Swap Dilemma constructive algorithms, data structures, divide and conquer, greedy, math, sortings	1700	x6213
1983B	Corner Twist constructive algorithms, greedy, implementation, math	1200	x13189
1983A	Array Divisibility constructive algorithms, math	800	x21756
1982E	Number of k-good subarrays bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle	2300	x1246
1982D	Beauty of the mountains brute force, data structures, implementation, math, number theory	1700	x5829
1982B	Collatz Conjecture brute force, implementation, math, number theory	1200	x14522
1982A	Soccer greedy, implementation, math, sortings	800	x22112
1981C	Turtle and an Incomplete Sequence bitmasks, brute force, constructive algorithms, greedy, implementation, math	1800	x4444
1981B	Turtle and an Infinite Sequence bitmasks, math	1300	x12005
1981A	Turtle and Piggy Are Playing a Game brute force, greedy, math	800	x20250
1980F2	Field Division (hard version) math, sortings	2400	x828
1980F1	Field Division (easy version) data structures, math, sortings	1900	x3248
1980E	Permutation of Rows and Columns constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings	1600	x8984
1980D	GCD-sequence greedy, implementation, math, number theory	1400	x12553
1980A	Problem Generator math	800	x36737
1978D	Elections data structures, greedy, implementation, math	1600	x9278
1978C	Manhattan Permutations constructive algorithms, data structures, greedy, implementation, math	1300	x12661
1978B	New Bakery binary search, greedy, math, ternary search	800	x19780
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings	1900	x5876
1977B	Binary Colouring bitmasks, constructive algorithms, greedy, math	1100	x16131
1977A	Little Nikita math	800	x28051
1976E	Splittable Permutations combinatorics, data structures, dfs and similar, greedy, math, trees	2500	x835
1975G	Zimpha Fan Club fft, greedy, math, strings	3000	x196
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math	2600	x695
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings	1000	x15902
1974A	Phone Desktop greedy, math	800	x30940
1973E	Cat, Fox and Swaps graphs, math, sortings	2500	x699
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x1710
1973C	Cat, Fox and Double Maximum constructive algorithms, greedy, implementation, math, sortings	1700	x7438
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x12654
1973A	Chess For Three brute force, dp, implementation, math	900	x22219
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x8742
1971E	Find the Car binary search, math, sortings	1500	x12454
1969D	Shop Game data structures, greedy, math, sortings	1900	x3998
1969A	Two Friends constructive algorithms, implementation, math	800	x18588
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1711
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x13612
1968A	Maximize? brute force, math, number theory	800	x31156
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x83
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x168
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1495
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3546
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x11922
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x11141
1965A	Everything Nim games, greedy, math, sortings	1400	x12160
1958B	Clock in the Pool *special problem, math	1400	x755
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1119
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4087
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x8704
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x757
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1346
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3560
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x11896
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4023
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6490
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x19637
1955A	Yogurt Sale math	800	x39915
1954F	Unique Strings combinatorics, dp, math	3100	x234
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2006
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x5506
1954C	Long Multiplication greedy, math, number theory	1200	x17846
1954B	Make It Ugly implementation, math	1200	x17178
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x22412
1952G	Mathematician Takeover binary search, dfs and similar, math		x975
1952E	Sweep Line combinatorics, games, math		x223
1951G	Clacking Balls combinatorics, math, probabilities	3100	x293
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3315
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5087
1951C	Ticket Hoarding greedy, math, sortings	1400	x10718
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18354
1950C	Clock Conversion implementation, math	800	x37309
1949K	Make Triangle constructive algorithms, math	2800	x268
1949H	Division Avoidance greedy, math	3100	x78
1949E	Damage per Second brute force, math	2900	x89
1948F	Rare Coins combinatorics, math, probabilities	2500	x1214
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2257

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