Problemset - Codeforces

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Codeforces Round (Div. 2)
2 days
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Problems

#	Name
1951D	Buying Jewels constructive algorithms, greedy, math	2000	x5121
1951C	Ticket Hoarding greedy, math, sortings	1400	x10812
1951A	Dual Trigger constructive algorithms, greedy, math	900	x18503
1950C	Clock Conversion implementation, math	800	x37505
1949K	Make Triangle constructive algorithms, math	2800	x274
1949H	Division Avoidance greedy, math	3100	x78
1949E	Damage per Second brute force, math	2900	x92
1948F	Rare Coins combinatorics, math, probabilities	2500	x1227
1946E	Girl Permutation combinatorics, dp, math, number theory	2200	x2276
1946B	Maximum Sum dp, greedy, math	1100	x19329
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x572
1945B	Fireworks math, number theory	900	x21384
1945A	Setting up Camp greedy, math	800	x26406
1944A	Destroying Bridges graphs, greedy, math	800	x22580
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1352
1943B	Non-Palindromic Substring hashing, implementation, math, strings	2000	x3577
1942G	Bessie and Cards combinatorics, dp, math	2800	x414
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x651
1942C2	Bessie's Birthday Cake (Hard Version) geometry, greedy, math	1700	x5856
1942C1	Bessie's Birthday Cake (Easy Version) geometry, greedy, math	1300	x10336
1942B	Bessie and MEX constructive algorithms, math	1100	x13231
1942A	Farmer John's Challenge constructive algorithms, math	800	x16651
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x28194
1941A	Rudolf and the Ticket brute force, math	800	x40785
1937A	Shuffle Party implementation, math	800	x22455
1936E	Yet Yet Another Permutation Problem divide and conquer, fft, math	3400	x103
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x2633
1936A	Bitwise Operation Wizard bitmasks, constructive algorithms, greedy, interactive, math	1700	x6978
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1268
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x7762
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x6385
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x17835
1934A	Too Min Too Max greedy, math	800	x24496
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x919
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x10495
1933D	Turtle Tenacity: Continual Mods constructive algorithms, greedy, math, number theory, sortings	1200	x19093
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x21694
1933B	Turtle Math: Fast Three Task implementation, math, number theory	800	x31294
1933A	Turtle Puzzle: Rearrange and Negate greedy, math, sortings	800	x36916
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x957
1932E	Final Countdown implementation, math, number theory	1600	x7561
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x14814
1931G	One-Dimensional Puzzle combinatorics, math, number theory	2000	x2606
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x14530
1931D	Divisible Pairs combinatorics, math, number theory	1300	x17328
1931C	Make Equal Again brute force, greedy, math	1000	x27675
1930E	2..3...4.... Wonderful! Wonderful! combinatorics, dp, math	2400	x1058
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x14476
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1708
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1592
1929D	Sasha and a Walk in the City combinatorics, dp, math, trees	1900	x4449
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x14046
1929B	Sasha and the Drawing constructive algorithms, greedy, math	800	x24550
1929A	Sasha and the Beautiful Array constructive algorithms, greedy, math, sortings	800	x30337
1928F	Digital Patterns combinatorics, data structures, implementation, math	2900	x228
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1617
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3998
1928C	Physical Education Lesson brute force, math, number theory	1600	x8036
1928A	Rectangle Cutting geometry, math	800	x21949
1927G	Paint Charges data structures, dp, greedy, math	2300	x1574
1927E	Klever Permutation constructive algorithms, math, two pointers	1400	x13217
1927C	Choose the Different Ones! brute force, greedy, math	1000	x26772
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x11089
1925D	Good Trip combinatorics, dp, math, probabilities	1900	x3415
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x19141
1924D	Balanced Subsequences combinatorics, dp, math	2700	x896
1924C	Fractal Origami geometry, math, matrices	2400	x1090
1924B	Space Harbour data structures, implementation, math, sortings	2100	x2390
1922E	Increasing Subsequences bitmasks, constructive algorithms, divide and conquer, greedy, math	1800	x7348
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5440
1922C	Closest Cities greedy, implementation, math	1300	x17690
1922B	Forming Triangles combinatorics, constructive algorithms, math, sortings	1200	x19807
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3635
1921E	Eat the Chip brute force, games, greedy, math	1600	x9335
1921C	Sending Messages greedy, math	900	x28352
1921A	Square greedy, math	800	x41470
1920E	Counting Binary Strings combinatorics, dp, math	2100	x2496
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5330
1920C	Partitioning the Array brute force, math, number theory	1600	x12608
1920B	Summation Game games, greedy, math, sortings	1100	x20044
1920A	Satisfying Constraints brute force, greedy, math	800	x27113
1919E	Counting Prefixes combinatorics, constructive algorithms, dp, implementation, math	2600	x814
1919A	Wallet Exchange games, math	800	x32481
1918G	Permutation of Given constructive algorithms, math	2700	x440
1918C	XOR-distance bitmasks, greedy, implementation, math	1400	x13304
1918A	Brick Wall constructive algorithms, greedy, implementation, math	800	x29479
1917E	Construct Matrix constructive algorithms, math	2500	x1315
1917D	Yet Another Inversions Problem combinatorics, data structures, dp, implementation, math, number theory	2300	x1714
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9873
1917A	Least Product constructive algorithms, math	800	x24826
1916H2	Matrix Rank (Hard Version) combinatorics, dp, math, matrices, string suffix structures	2700	x518
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x598
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x8206
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x17261
1916B	Two Divisors constructive algorithms, math, number theory	1000	x24719
1916A	2023 constructive algorithms, implementation, math, number theory	800	x25148
1915E	Romantic Glasses data structures, greedy, math	1300	x19966
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1748
1914C	Quests greedy, math	1100	x22324
1914B	Preparing for the Contest constructive algorithms, math	800	x29469