Problemset - Codeforces

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Educational Codeforces Round 170 (Rated for Div. 2)
13 days

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Problems

#	Name
132A	Turing Tape implementation	1300	x2774
131F	Present to Mom binary search, two pointers	2000	x642
131E	Yet Another Task with Queens sortings	1700	x1850
131D	Subway dfs and similar, graphs	1600	x4662
131C	The World is a Theatre combinatorics, math	1400	x11087
131B	Opposites Attract implementation, math	1200	x7034
131A	cAPS lOCK implementation, strings	1000	x85232
130J	Date calculation *special problem	1800	x339
130I	Array sorting *special problem, sortings	2300	x167
130H	Balanced brackets *special problem	1600	x594
130G	CAPS LOCK ON *special problem	1700	x284
130F	Prime factorization *special problem	1600	x278
130E	Tribonacci numbers *special problem	1600	x296
130D	Exponentiation *special problem	1500	x393
130C	Decimal sum *special problem	1500	x495
130B	Gnikool Ssalg *special problem, implementation, strings	1400	x529
130A	Hexagonal numbers *special problem, implementation	900	x1621
129B	Students and Shoelaces brute force, dfs and similar, graphs, implementation	1200	x12171
129A	Cookies implementation	900	x22551
128E	Birthday geometry, math	2900	x98
128D	Numbers constructive algorithms, implementation	2000	x1142
128C	Games with Rectangle combinatorics, dp	2000	x2927
128B	String brute force, constructive algorithms, hashing, implementation, string suffix structures, strings	2100	x2557
128A	Statues dfs and similar	1500	x3189
127B	Canvas Frames implementation	1000	x8732
127A	Wasted Time geometry	900	x11189
126E	Pills brute force, flows	2900	x83
126D	Fibonacci Sums dp, math	2300	x830
126C	E-reader Display constructive algorithms, greedy	2000	x723
126B	Password binary search, dp, hashing, string suffix structures, strings	1700	x19330
126A	Hot Bath binary search, brute force, math	1900	x1433
125E	MST Company binary search, graphs	2400	x1065
125D	Two progressions constructive algorithms, greedy	2200	x400
125C	Hobbits' Party constructive algorithms, greedy	1600	x922
125B	Simple XML implementation	1000	x2887
125A	Measuring Lengths in Baden math	1400	x2715
124B	Permutations brute force, combinatorics, implementation	1400	x3895
124A	The number of positions math	1000	x38183
123E	Maze dfs and similar, dp, probabilities, trees	2500	x717
123D	String string suffix structures	2300	x1212
123C	Brackets combinatorics, dp, greedy	2300	x603
123B	Squares math	1800	x1114
123A	Prime Permutation implementation, number theory, strings	1300	x3603
122B	Lucky Substring brute force, implementation	1000	x12316
122A	Lucky Division brute force, number theory	1000	x123010
121E	Lucky Array data structures	2400	x1718
121D	Lucky Segments binary search, implementation, two pointers	2500	x276
121C	Lucky Permutation brute force, combinatorics, number theory	1900	x1286
121B	Lucky Transformation strings	1500	x2571
121A	Lucky Sum implementation	1100	x9168
120J	Minimum Sum divide and conquer, geometry, sortings	1900	x920
120I	Luck is in Numbers greedy	2200	x304
120H	Brevity is Soul of Wit graph matchings	1800	x1392
120G	Boom implementation	1800	x689
120F	Spiders dp, greedy, trees	1400	x3577
120E	Put Knight! games, math	1400	x2726
120D	Three Sons brute force	1400	x1927
120C	Winnie-the-Pooh and honey implementation, math	1100	x3664
120B	Quiz League implementation	1100	x3425
120A	Elevator brute force, implementation, math	1000	x4588
119E	Alternative Reality geometry	2400	x95
119D	String Transformation hashing, strings	2500	x491
119C	Education Reform dp	2000	x922
119B	Before Exam constructive algorithms, implementation, sortings	1900	x1078
119A	Epic Game implementation	800	x27356
118E	Bertown roads dfs and similar, graphs	2000	x6537
118D	Caesar's Legions dp	1700	x17393
118C	Fancy Number brute force, greedy, sortings, strings	1900	x2590
118B	Present from Lena constructive algorithms, implementation	1000	x29864
118A	String Task implementation, strings	1000	x191508
117E	Tree or not Tree data structures, divide and conquer, implementation, trees	2900	x329
117D	Not Quick Transformation divide and conquer, math	2500	x336
117C	Cycle dfs and similar, graphs	2000	x2616
117B	Very Interesting Game brute force, number theory	1800	x1607
117A	Elevator implementation, math	1300	x2015
116B	Little Pigs and Wolves greedy, implementation	1100	x13720
116A	Tram implementation	800	x140840
115E	Linear Kingdom Races data structures, dp	2400	x1548
115D	Unambiguous Arithmetic Expression dp, expression parsing	2600	x383
115C	Plumber math	2200	x595
115B	Lawnmower greedy, sortings	1500	x2598
115A	Party dfs and similar, graphs, trees	900	x34420
114B	PFAST Inc. bitmasks, brute force, graphs	1500	x3642
114A	Cifera math	1000	x14107
113E	Sleeping combinatorics, implementation, math	2700	x119
113D	Museum math, matrices, probabilities	2700	x674
113C	Double Happiness brute force, math, number theory	2200	x1232
113B	Petr# brute force, data structures, hashing, strings	2000	x2806
113A	Grammar Lessons implementation, strings	1600	x2293
112B	Petya and Square implementation, math	1200	x4143
112A	Petya and Strings implementation, strings	800	x223406
111E	Petya and Rectangle	2900	x66
111D	Petya and Coloring combinatorics, dp	2300	x759
111C	Petya and Spiders bitmasks, dp, dsu	2100	x1372
111B	Petya and Divisors binary search, data structures, number theory	1900	x3663
111A	Petya and Inequiations greedy	1400	x4757
110B	Lucky String constructive algorithms, strings	1100	x10192
110A	Nearly Lucky Number implementation	800	x153586
109E	Lucky Interval brute force, math	2700	x101
109D	Lucky Sorting constructive algorithms, sortings	2000	x802