Problemset - Codeforces

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Before contest
Codeforces Round (Div. 1)
3 weeks

Before contest
Codeforces Round (Div. 2)
3 weeks

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Difficulty: —

two pointers

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Problems

#	Name
830C	Bamboo Partition brute force, data structures, implementation, math, number theory, sortings, two pointers	2300	x1200
818E	Card Game Again binary search, data structures, number theory, two pointers	1900	x2267
814C	An impassioned circulation of affection brute force, dp, strings, two pointers	1600	x6585
799E	Aquarium decoration data structures, greedy, two pointers	2500	x930
788A	Functions again dp, two pointers	1600	x9091
780H	Intranet of Buses binary search, geometry, implementation, two pointers	3100	x118
777C	Alyona and Spreadsheet binary search, data structures, dp, greedy, implementation, two pointers	1600	x6365
774B	Significant Cups *special problem, binary search, data structures, two pointers	2100	x223
771F	Bear and Isomorphic Points geometry, two pointers	3300	x81
769B	News About Credit *special problem, greedy, two pointers	1200	x3287
767D	Cartons of milk binary search, data structures, greedy, sortings, two pointers	2100	x2233
762C	Two strings binary search, hashing, strings, two pointers	2100	x2544
762B	USB vs. PS/2 greedy, implementation, sortings, two pointers	1400	x8062
749C	Voting greedy, implementation, two pointers	1500	x5969
748E	Santa Claus and Tangerines binary search, data structures, greedy, two pointers	2100	x1465
746F	Music in Car data structures, greedy, two pointers	2200	x742
744E	Hongcow Masters the Cyclic Shift strings, two pointers	3200	x135
734C	Anton and Making Potions binary search, dp, greedy, two pointers	1600	x5329
733E	Sleep in Class constructive algorithms, data structures, math, two pointers	2400	x897
733C	Epidemic in Monstropolis constructive algorithms, dp, greedy, two pointers	1800	x3343
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x495
716B	Complete the Word greedy, two pointers	1300	x12142
702C	Cellular Network binary search, implementation, two pointers	1500	x14797
701C	They Are Everywhere binary search, strings, two pointers	1500	x14991
696F	...Dary! binary search, geometry, two pointers	3300	x122
682E	Alyona and Triangles geometry, two pointers	2600	x663
676C	Vasya and String binary search, dp, strings, two pointers	1500	x18806
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x613
660C	Hard Process binary search, dp, two pointers	1600	x9340
652C	Foe Pairs combinatorics, sortings, two pointers	1800	x3220
650B	Image Preview binary search, brute force, dp, two pointers	1900	x3344
645C	Enduring Exodus binary search, two pointers	1600	x3258
644B	Processing Queries *special problem, constructive algorithms, data structures, two pointers	1700	x2699
639D	Bear and Contribution data structures, greedy, sortings, two pointers	2400	x966
633E	Startup Funding binary search, constructive algorithms, data structures, probabilities, two pointers	2400	x583
627E	Orchestra two pointers	3000	x571
620D	Professor GukiZ and Two Arrays binary search, two pointers	2200	x1700
618F	Double Knapsack constructive algorithms, two pointers	3000	x1385
616D	Longest k-Good Segment binary search, data structures, two pointers	1600	x9388
613B	Skills binary search, brute force, dp, greedy, sortings, two pointers	1900	x2212
611G	New Year and Cake geometry, two pointers	2900	x433
610D	Vika and Segments constructive algorithms, data structures, geometry, two pointers	2300	x1491
609D	Gadgets for dollars and pounds binary search, greedy, two pointers	2000	x2705
602B	Approximating a Constant Range dp, implementation, two pointers	1400	x10800
600B	Queries about less or equal elements binary search, data structures, sortings, two pointers	1300	x29652
594C	Edo and Magnets brute force, greedy, implementation, two pointers	2300	x689
592E	BCPC binary search, geometry, two pointers	2700	x213
581F	Zublicanes and Mumocrates dp, trees, two pointers	2400	x872
580B	Kefa and Company binary search, sortings, two pointers	1500	x26373
577B	Modulo Sum combinatorics, data structures, dp, two pointers	1900	x12124
533E	Correcting Mistakes constructive algorithms, dp, greedy, hashing, strings, two pointers	1800	x2258
524D	Social Network greedy, two pointers	2100	x954
519D	A and B and Interesting Substrings data structures, dp, two pointers	1800	x6368
516D	Drazil and Morning Exercise dfs and similar, dp, dsu, trees, two pointers	2800	x1310
514D	R2D2 and Droid Army binary search, data structures, two pointers	2000	x4366
505C	Mr. Kitayuta, the Treasure Hunter dfs and similar, dp, two pointers	1900	x6351
498B	Name That Tune dp, probabilities, two pointers	2400	x1169
493C	Vasya and Basketball binary search, brute force, data structures, implementation, sortings, two pointers	1600	x6792
489B	BerSU Ball dfs and similar, dp, graph matchings, greedy, sortings, two pointers	1200	x48662
487B	Strip binary search, data structures, dp, two pointers	2000	x3511
484B	Maximum Value binary search, math, sortings, two pointers	2100	x7024
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x36019
446A	DZY Loves Sequences dp, implementation, two pointers	1600	x12530
444D	DZY Loves Strings binary search, hashing, strings, two pointers	2500	x773
439D	Devu and his Brother binary search, sortings, ternary search, two pointers	1700	x6053
432D	Prefixes and Suffixes dp, string suffix structures, strings, two pointers	2000	x9050
430B	Balls Game brute force, two pointers	1400	x3706
427C	Checkposts dfs and similar, graphs, two pointers	1700	x13880
420C	Bug in Code data structures, graphs, implementation, two pointers	1900	x1259
416A	Guess a number! greedy, implementation, two pointers	1400	x8904
414D	Mashmokh and Water Tanks binary search, data structures, greedy, trees, two pointers	2300	x683
406E	Hamming Triples implementation, math, two pointers	2800	x234
391A	Genetic Engineering implementation, two pointers		x1720
387B	George and Round brute force, greedy, two pointers	1200	x12206
386C	Diverse Substrings dp, strings, two pointers	2000	x780
384B	Multitasking greedy, implementation, sortings, two pointers	1500	x3525
383B	Volcanoes binary search, implementation, sortings, two pointers	2500	x664
381A	Sereja and Dima greedy, implementation, two pointers	800	x65310
372D	Choosing Subtree is Fun binary search, data structures, dfs and similar, trees, two pointers	2600	x967
372A	Counting Kangaroos is Fun binary search, greedy, sortings, two pointers	1600	x12937
371E	Subway Innovation greedy, math, two pointers	2000	x1292
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1555
364E	Empty Rectangles divide and conquer, two pointers	3000	x576
359D	Pair of Numbers binary search, brute force, data structures, math, two pointers	2000	x5070
343C	Read Time binary search, greedy, two pointers	1900	x3003
318B	Strings of Power implementation, strings, two pointers	1300	x7515
314D	Sereja and Straight Lines binary search, data structures, geometry, sortings, two pointers	2500	x523
309B	Context Advertising dp, two pointers	2100	x711
309A	Morning run binary search, math, two pointers	2000	x487
302B	Eugeny and Play List binary search, implementation, two pointers	1200	x8109
293D	Ksusha and Square geometry, math, probabilities, two pointers	2700	x238
281B	Nearest Fraction brute force, implementation, two pointers	1700	x3030
280B	Maximum Xor Secondary data structures, implementation, two pointers	1800	x4572
279C	Ladder dp, implementation, two pointers	1700	x8234
279B	Books binary search, brute force, implementation, two pointers	1400	x52428
264D	Colorful Stones dp, two pointers	2500	x419
264A	Escape from Stones constructive algorithms, data structures, implementation, two pointers	1200	x10754
261E	Maxim and Calculator brute force, dp, two pointers	2800	x413
253D	Table with Letters - 2 brute force, two pointers	2000	x840
253B	Physics Practical binary search, dp, sortings, two pointers	1400	x10686