Problemset - Codeforces

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Educational Codeforces Round 165 (Rated for Div. 2)
37:52:45
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Problems

#	Name
158A	Next Round *special problem, implementation	800	x231710
158B	Taxi *special problem, greedy, implementation	1100	x82234
770A	New Password *special problem, implementation	800	x18649
1331A	Is it rated? *special problem		x16995
522A	Reposts *special problem, dfs and similar, dp, graphs, trees	1200	x15693
637B	Chat Order *special problem, binary search, constructive algorithms, data structures, sortings	1200	x14991
1505A	Is it rated - 2 *special problem, implementation, interactive	900	x13961
1812A	Are You a Robot? special problem, special problem, *special problem, expression parsing, strings		x13037
1331D	Again? *special problem, implementation		x11856
1663A	Who Tested? *special problem, expression parsing, trees		x10386
158C	Cd and pwd commands *special problem, data structures, implementation	1400	x8866
409H	A + B Strikes Back *special problem, brute force, constructive algorithms, dsu, implementation	1500	x8656
522B	Photo to Remember *special problem, data structures, dp, implementation	1100	x8645
1331B	Limericks *special problem, math, number theory		x6976
411A	Password Check *special problem, implementation	800	x6957
1505C	Fibonacci Words *special problem, implementation	1400	x6292
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6169
1505B	DMCA *special problem, implementation, number theory	1600	x5994
291A	Spyke Talks *special problem, implementation, sortings	800	x5977
172A	Phone Code *special problem, brute force, implementation	800	x5888
1812J	Unmysterious Language *special problem, constructive algorithms, strings		x5785
1057A	Bmail Computer Network *special problem, dfs and similar, trees	900	x5746
1663C	Pōja Verdon *special problem, implementation, math		x5610
769A	Year of University Entrance *special problem, implementation, sortings	800	x5566
1812B	Was it Rated? special problem, special problem, *special problem, brute force, implementation		x5562
637A	Voting for Photos *special problem, constructive algorithms, implementation	1000	x5304
644A	Parliament of Berland *special problem, constructive algorithms	1000	x4376
171A	Mysterious numbers - 1 *special problem, constructive algorithms	1200	x4344
1812D	Trivial Conjecture *special problem, constructive algorithms, math, number theory		x4332
159D	Palindrome pairs *special problem, brute force, dp, strings	1500	x4247
774C	Maximum Number *special problem, constructive algorithms, greedy, implementation	1200	x4018
1812E	Not a Geometry Problem special problem, special problem, constructive algorithms, geometry, math		x3937
171B	Star *special problem, combinatorics	1300	x3936
638A	Home Numbers *special problem, constructive algorithms, math	1100	x3749
159B	Matchmaker *special problem, greedy, sortings	1100	x3667
656A	Da Vinci Powers *special problem	1900	x3553
1663B	Mike's Sequence *special problem, divide and conquer, implementation, math		x3348
928A	Login Verification *special problem, strings	1200	x3331
769B	News About Credit *special problem, greedy, two pointers	1200	x3232
1331C	...And after happily lived ever they *special problem, bitmasks		x3131
784A	Numbers Joke *special problem	1700	x3109
291B	Command Line Arguments *special problem, implementation, strings	1300	x3010
290A	Mysterious strings *special problem, implementation	1400	x2941
522D	Closest Equals *special problem, data structures	2000	x2940
159C	String Manipulation 1.0 *special problem, binary search, brute force, data structures, strings	1400	x2915
770B	Maximize Sum of Digits *special problem, implementation, math	1300	x2718
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2685
64A	Factorial *special problem, implementation	1300	x2684
644B	Processing Queries *special problem, constructive algorithms, data structures, two pointers	1700	x2601
523A	Rotate, Flip and Zoom *special problem, implementation	1200	x2566
770C	Online Courses In BSU *special problem, dfs and similar, graphs, implementation	1500	x2524
171D	Broken checker *special problem, brute force	1300	x2508
929A	Прокат велосипедов *special problem, greedy, implementation	1400	x2491
928B	Chat *special problem, dp	1400	x2489
523C	Name Quest *special problem, greedy	1400	x2466
159A	Friends or Not *special problem, greedy, implementation	1400	x2453
409A	The Great Game *special problem	1700	x2434
637C	Promocodes with Mistakes *special problem, brute force, constructive algorithms, implementation	1400	x2409
290B	QR code *special problem, implementation	1500	x2400
523D	Statistics of Recompressing Videos *special problem, data structures, implementation	1600	x2235
769D	k-Interesting Pairs Of Integers *special problem, bitmasks, brute force, meet-in-the-middle	1700	x2208
769C	Cycle In Maze *special problem, dfs and similar, graphs, greedy, shortest paths	1700	x2102
929B	Места в самолёте *special problem, implementation	1300	x2037
409F	000001 *special problem	1900	x2037
72G	Fibonacci army *special problem, dp	1000	x1972
637D	Running with Obstacles *special problem, data structures, dp, greedy	1600	x1948
409C	Magnum Opus *special problem	1700	x1943
1346A	Color Revolution *special problem, math	1000	x1940
638B	Making Genome in Berland *special problem, dfs and similar, strings	1500	x1926
774D	Lie or Truth *special problem, constructive algorithms, implementation, sortings	1500	x1903
1769A	Узкая дорога *special problem, math	800	x1894
784E	Twisted Circuit *special problem, brute force, implementation	2000	x1869
1057B	DDoS *special problem, brute force	1400	x1785
1431A	Selling Hamburgers *special problem	800	x1782
290D	Orange *special problem, implementation	1400	x1782
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1719
409D	Big Data *special problem	1700	x1692
291C	Network Mask *special problem, bitmasks, brute force, implementation	1600	x1664
656B	Scrambled *special problem, implementation	1700	x1628
770D	Draw Brackets! *special problem, implementation	1400	x1567
1910A	Username *special problem, implementation	1100	x1536
130A	Hexagonal numbers *special problem, implementation	900	x1518
290C	WTF? *special problem, graph matchings, implementation, trees	1700	x1515
638C	Road Improvement *special problem, dfs and similar, graphs, greedy, trees	1800	x1480
1505F	Math *special problem, math	2200	x1471
291D	Parallel Programming *special problem, greedy	1600	x1466
158E	Phone Talks *special problem, dp, sortings	1900	x1449
1531A	Зингер \| color *special problem, implementation		x1443
171E	MYSTERIOUS LANGUAGE *special problem	2000	x1397
1663D	Is it rated - 3 *special problem, combinatorics, dp, math		x1381
172D	Calendar Reform *special problem, number theory	1500	x1381
1170A	Three Integers Again *special problem, math		x1365
409B	Mysterious Language *special problem	1700	x1341
1488A	From Zero To Y *special problem, math	900	x1332
1769B1	Копирование файлов I *special problem, brute force, implementation, math	1000	x1309
1387B1	Village (Minimum) *special problem, dp, greedy, trees	2100	x1308
291E	Tree-String Problem *special problem, dfs and similar, hashing, strings	2000	x1269
1663H	Cross-Language Program *special problem, constructive algorithms		x1258
1211A	Three Problems *special problem, implementation	1000	x1258
774K	Stepan and Vowels *special problem, implementation, strings	1600	x1256

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