Problemset - Codeforces

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Educational Codeforces Round 166 (Rated for Div. 2)
39:04:11
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brute force

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Problems

#	Name
1977D	XORificator bitmasks, brute force, hashing		x832
1977C	Nikita and LCM brute force, data structures, dp, greedy, math, number theory, sortings		x3775
1975F	Set bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math		x448
1975D	Paint the Tree brute force, dfs and similar, dp, greedy, shortest paths, trees		x3891
1975C	Chamo and Mocha's Array binary search, brute force, greedy		x9920
1975B	378QAQ and Mocha's Array brute force, greedy, math, sortings		x12436
1975A	Bazoka and Mocha's Array brute force, greedy, implementation, sortings		x14386
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x2435
1973F	Maximum GCD Sum Queries bitmasks, brute force, dp, implementation, number theory	3100	x123
1973D	Cat, Fox and Maximum Array Split brute force, interactive, math	2400	x1478
1973A	Chess For Three brute force, dp, implementation, math	900	x19569
1972A	Contest Proposal brute force, greedy, two pointers	800	x19311
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x7427
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x370
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x431
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x352
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1482
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x12314
1968A	Maximize? brute force, math, number theory	800	x28567
1967F	Next and Prev brute force, data structures, implementation	3200	x36
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1381
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3268
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x10620
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1046
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x3806
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x709
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1273
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3360
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x19545
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1062
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x3657
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x7422
1952J	Help, what does it mean to be "Based" brute force, constructive algorithms, expression parsing, implementation, sortings		x704
1952F	Grid brute force		x1654
1952C	They Have Fooled brute force, schedules		x2750
1951E	No Palindromes brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings	2000	x3106
1950F	0, 1, 2, Tree! bitmasks, brute force, greedy, implementation, trees	1700	x7840
1950E	Nearly Shortest Repeating Substring brute force, implementation, number theory, strings	1500	x12363
1950D	Product of Binary Decimals brute force, dp, implementation, number theory	1100	x20791
1949E	Damage per Second brute force, math	2900	x87
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x2069
1949A	Grove brute force, dfs and similar, dp, geometry, probabilities	3300	x86
1948G	MST with Matching bitmasks, brute force, dsu, graph matchings, trees	3100	x624
1948E	Clique Partition brute force, constructive algorithms, graphs, greedy, implementation	2100	x2669
1948D	Tandem Repeats? brute force, strings, two pointers	1700	x8356
1948C	Arrow Path brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths	1300	x14790
1948B	Array Fix brute force, dp, greedy, implementation	1100	x20810
1948A	Special Characters brute force, constructive algorithms	800	x26618
1946D	Birthday Gift bitmasks, brute force, constructive algorithms, greedy, implementation	1900	x4147
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x509
1945C	Left and Right Houses brute force	1200	x13204
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x375
1943D1	Counting Is Fun (Easy Version) brute force, combinatorics, dp, math	2400	x1277
1942F	Farmer John's Favorite Function brute force, data structures, implementation, math	2700	x582
1941B	Rudolf and 121 brute force, dp, greedy, math	1000	x26863
1941A	Rudolf and the Ticket brute force, math	800	x39425
1935E	Distance Learning Courses in MAC bitmasks, brute force, data structures, greedy, math	2400	x1188
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x7271
1934E	Weird LCM Operations brute force, constructive algorithms, number theory	3000	x186
1934B	Yet Another Coin Problem brute force, dp, greedy, math	1200	x16976
1933G	Turtle Magic: Royal Turtle Shell Pattern bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math	2300	x889
1933C	Turtle Fingers: Count the Values of k brute force, implementation, math, number theory	1100	x20822
1932C	LR-remainders brute force, data structures, implementation, math, two pointers	1400	x13982
1931C	Make Equal Again brute force, greedy, math	1000	x26464
1931A	Recovering a Small String brute force, strings	800	x33891
1930F	Maximize the Difference bitmasks, brute force, dfs and similar	2700	x618
1930D1	Sum over all Substrings (Easy Version) brute force, dp, greedy, strings	1800	x3739
1930B	Permutation Printing brute force, constructive algorithms, math	1000	x13840
1929F	Sasha and the Wedding Binary Search Tree brute force, combinatorics, data structures, dfs and similar, math, trees	2300	x1656
1929E	Sasha and the Happy Tree Cutting bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees	2300	x1535
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x13479
1928E	Modular Sequence brute force, constructive algorithms, dp, graphs, greedy, math, number theory	2300	x1571
1928D	Lonely Mountain Dungeons brute force, data structures, greedy, math, ternary search	1900	x3803
1928C	Physical Education Lesson brute force, math, number theory	1600	x7641
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x18622
1927C	Choose the Different Ones! brute force, greedy, math	1000	x25879
1926F	Vlad and Avoiding X bitmasks, brute force, dfs and similar, dp, implementation	2200	x1527
1925B	A Balanced Problemset? brute force, greedy, math, number theory	1200	x18462
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x337
1922D	Berserk Monsters brute force, data structures, dsu, implementation, math	1900	x5272
1921G	Mischievous Shooter brute force, data structures, divide and conquer, dp, implementation	2200	x1142
1921F	Sum of Progression brute force, data structures, dp, implementation, math	1900	x3497
1921E	Eat the Chip brute force, games, greedy, math	1600	x9018
1920F1	Smooth Sailing (Easy Version) binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths	2500	x895
1920D	Array Repetition binary search, brute force, dsu, implementation, math	1900	x5158
1920C	Partitioning the Array brute force, math, number theory	1600	x12010
1920A	Satisfying Constraints brute force, greedy, math	800	x26648
1917C	Watering an Array brute force, greedy, implementation, math	1600	x9503
1917B	Erase First or Second Letter brute force, combinatorics, data structures, dp, strings	1100	x19695
1916H1	Matrix Rank (Easy Version) brute force, combinatorics, dp, math, matrices	2700	x585
1916D	Mathematical Problem brute force, constructive algorithms, geometry, math	1700	x7957
1915B	Not Quite Latin Square bitmasks, brute force, implementation	800	x38993
1914G1	Light Bulbs (Easy Version) brute force, combinatorics, dfs and similar, dp, dsu, graphs, math, trees	2100	x1695
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x11269
1914D	Three Activities brute force, dp, greedy, implementation, sortings	1200	x18557
1913C	Game with Multiset binary search, bitmasks, brute force, greedy	1300	x13860
1909F1	Small Permutation Problem (Easy Version) brute force, combinatorics, dp, math	2200	x1655
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1266
1907G	Lights brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation	2200	x1777
1907E	Good Triples brute force, combinatorics, number theory	1600	x8973

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