Problemset - Codeforces

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Codeforces Round 941 (Div. 1)
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Codeforces Round 941 (Div. 2)
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two pointers

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Problems

#	Name
1912I	Innovative Washing Machine geometry, math, two pointers	3300	x54
1431H	Rogue-like Game *special problem, brute force, greedy, two pointers	2600	x63
771F	Bear and Isomorphic Points geometry, two pointers	3300	x78
780H	Intranet of Buses binary search, geometry, implementation, two pointers	3100	x116
696F	...Dary! binary search, geometry, two pointers	3300	x119
744E	Hongcow Masters the Cyclic Shift strings, two pointers	3200	x132
1901F	Landscaping binary search, geometry, two pointers	2900	x142
1787I	Treasure Hunt data structures, divide and conquer, two pointers	3400	x147
1696H	Maximum Product? brute force, combinatorics, dp, greedy, implementation, math, two pointers	3500	x152
138E	Hellish Constraints brute force, dp, two pointers	2900	x164
1753F	Minecraft Series brute force, two pointers	3500	x185
1638F	Two Posters brute force, data structures, greedy, two pointers	3200	x189
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x202
592E	BCPC binary search, geometry, two pointers	2700	x208
243D	Cubes data structures, dp, geometry, two pointers	2700	x208
774B	Significant Cups *special problem, binary search, data structures, two pointers	2100	x216
406E	Hamming Triples implementation, math, two pointers	2800	x226
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x233
48G	Galaxy Union dp, trees, two pointers	2700	x253
1588F	Jumping Through the Array binary search, data structures, graphs, two pointers	3500	x266
121D	Lucky Segments binary search, implementation, two pointers	2500	x270
1939C	More Gifts *special problem, dfs and similar, two pointers		x271
1693F	I Might Be Wrong binary search, greedy, two pointers	3400	x274
203E	Transportation greedy, sortings, two pointers	2300	x276
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x283
1682F	MCMF? data structures, flows, graphs, greedy, sortings, two pointers	2700	x285
1470E	Strange Permutation binary search, combinatorics, data structures, dp, graphs, implementation, two pointers	3200	x290
1396D	Rainbow Rectangles data structures, sortings, two pointers	3300	x295
1949J	Amanda the Amoeba graphs, implementation, trees, two pointers		x297
78D	Archer's Shot binary search, geometry, math, two pointers	2300	x301
1556G	Gates to Another World bitmasks, data structures, dsu, two pointers	3300	x303
1805F2	Survival of the Weakest (hard version) greedy, math, sortings, two pointers	3100	x319
166D	Shoe Store dp, graph matchings, greedy, sortings, two pointers	2500	x344
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x345
1418F	Equal Product data structures, math, number theory, two pointers	3000	x352
43E	Race brute force, implementation, two pointers	2300	x370
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x398
1131G	Most Dangerous Shark data structures, dp, two pointers	2700	x399
261E	Maxim and Calculator brute force, dp, two pointers	2800	x402
264D	Colorful Stones dp, two pointers	2500	x406
1728G	Illumination binary search, bitmasks, brute force, combinatorics, dp, math, two pointers	2700	x407
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x410
611G	New Year and Cake geometry, two pointers	2900	x422
1175G	Yet Another Partiton Problem data structures, divide and conquer, dp, geometry, two pointers	3000	x428
1034D	Intervals of Intervals binary search, data structures, two pointers	3500	x431
1381D	The Majestic Brown Tree Snake dfs and similar, dp, greedy, trees, two pointers	3000	x446
164B	Ancient Berland Hieroglyphs two pointers	2000	x450
309A	Morning run binary search, math, two pointers	2000	x458
1841F	Monocarp and a Strategic Game geometry, sortings, two pointers	2700	x468
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x469
887D	Ratings and Reality Shows data structures, two pointers	2400	x471
76B	Mice greedy, two pointers	2100	x494
309B	Context Advertising dp, two pointers	2100	x498
989D	A Shade of Moonlight binary search, geometry, math, sortings, two pointers	2500	x503
1313E	Concatenation with intersection data structures, hashing, strings, two pointers	2700	x506
314D	Sereja and Straight Lines binary search, data structures, geometry, sortings, two pointers	2500	x514
1476G	Minimum Difference data structures, hashing, sortings, two pointers	3100	x525
627E	Orchestra two pointers	3000	x531
364E	Empty Rectangles divide and conquer, two pointers	3000	x533
163C	Conveyor sortings, two pointers	2100	x536
70C	Lucky Tickets binary search, data structures, sortings, two pointers	2200	x561
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x567
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x576
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x580
1819D	Misha and Apples brute force, data structures, dp, two pointers	2800	x593
131F	Present to Mom binary search, two pointers	2000	x598
1599A	Weights constructive algorithms, greedy, two pointers	2600	x633
682E	Alyona and Triangles geometry, two pointers	2600	x645
383B	Volcanoes binary search, implementation, sortings, two pointers	2500	x652
1771E	Hossam and a Letter brute force, dp, implementation, two pointers	2500	x657
1312F	Attack on Red Kingdom games, two pointers	2500	x660
1866I	Imagination Castle dp, games, two pointers	2300	x666
55E	Very simple problem geometry, two pointers	2500	x672
594C	Edo and Magnets brute force, greedy, implementation, two pointers	2300	x673
414D	Mashmokh and Water Tanks binary search, data structures, greedy, trees, two pointers	2300	x673
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x697
1250G	Discarding Game dp, greedy, two pointers	2300	x707
386C	Diverse Substrings dp, strings, two pointers	2000	x710
746F	Music in Car data structures, greedy, two pointers	2200	x722
1609F	Interesting Sections data structures, divide and conquer, meet-in-the-middle, two pointers	2800	x723
444D	DZY Loves Strings binary search, hashing, strings, two pointers	2500	x748
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x762
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x777
1887D	Split binary search, data structures, divide and conquer, dsu, math, trees, two pointers	2700	x796
1876D	Lexichromatography combinatorics, dfs and similar, dsu, graphs, two pointers	2500	x803
253D	Table with Letters - 2 brute force, two pointers	2000	x805
1814D	Balancing Weapons binary search, brute force, data structures, math, two pointers	2500	x817
1684F	Diverse Segments data structures, two pointers	2600	x841
581F	Zublicanes and Mumocrates dp, trees, two pointers	2400	x843
733E	Sleep in Class constructive algorithms, data structures, math, two pointers	2400	x858
1493E	Enormous XOR bitmasks, constructive algorithms, greedy, math, strings, two pointers	2600	x861
250D	Building Bridge geometry, ternary search, two pointers	1900	x873
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x891
1835B	Lottery binary search, brute force, greedy, math, two pointers	2500	x894
1374E2	Reading Books (hard version) data structures, greedy, implementation, sortings, ternary search, two pointers	2500	x897
372D	Choosing Subtree is Fun binary search, data structures, dfs and similar, trees, two pointers	2600	x906
799E	Aquarium decoration data structures, greedy, two pointers	2500	x910
1793E	Velepin and Marketing binary search, data structures, dp, greedy, sortings, two pointers	2600	x922
524D	Social Network greedy, two pointers	2100	x938
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x945

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