Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
4 days
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binary search

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Problems

#	Name
2118D2	Red Light, Green Light (Hard version) binary search, brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2200	x2496
2117D	Retaliation binary search, math, number theory	1200	x22109
2114F	Small Operations binary search, brute force, dfs and similar, dp, math, number theory, sortings	2000	x5496
2114A	Square Year binary search, brute force, math	800	x43151
2113D	Cheater binary search, constructive algorithms, greedy, implementation	2200	x2876
2112C	Coloring Game binary search, brute force, greedy, two pointers	1300	x17708
2111G	Divisible Subarrays binary search, bitmasks, brute force, data structures, interactive	2900	x398
2111E	Changing the String binary search, data structures, greedy, implementation, sortings, strings	1900	x5404
2110D	Fewer Batteries binary search, dfs and similar, dp, graphs, greedy, hashing	1700	x8601
2109F	Penguin Steps binary search, dfs and similar, flows, graphs, shortest paths	3000	x274
2108F	Fallen Towers binary search, greedy	2900	x547
2108D	Needle in a Numstack binary search, brute force, implementation, interactive	2200	x2418
2108C	Neo's Escape binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation	1500	x14667
2107F2	Cycling (Hard Version) binary search, brute force, data structures, dp, greedy	2800	x506
2107F1	Cycling (Easy Version) binary search, brute force, dp, greedy	2300	x1821
2107E	Ain and Apple Tree binary search, constructive algorithms, greedy, math, trees	2600	x932
2107C	Maximum Subarray Sum binary search, constructive algorithms, dp, implementation, math	1500	x12085
2106G2	Baudelaire (hard version) binary search, dfs and similar, divide and conquer, implementation, interactive, trees	2500	x609
2106G1	Baudelaire (easy version) binary search, constructive algorithms, divide and conquer, greedy, interactive, trees	2200	x1612
2106E	Wolf binary search, greedy, math	1800	x5930
2106D	Flower Boy binary search, dp, greedy, two pointers	1500	x12255
2104F	Numbers and Strings binary search, brute force, dfs and similar, dp, implementation, math	2600	x725
2104E	Unpleasant Strings binary search, dp, greedy, strings	1700	x8085
2104D	Array and GCD binary search, greedy, math, number theory	1400	x13219
2103C	Median Splits binary search, greedy, implementation, sortings	1600	x10548
2101C	23 Kingdom binary search, brute force, data structures, greedy, ternary search, two pointers	2200	x2260
2095C	Would It Be Unrated? *special problem, binary search, brute force		x3743
2094H	La Vaca Saturno Saturnita binary search, brute force, math, number theory	1900	x3785
2093G	Shorten the Array binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers	1900	x3798
2093E	Min Max MEX binary search, brute force, greedy	1500	x13431
2091F	Igor and Mountain binary search, brute force, dp	1800	x6155
2091D	Place of the Olympiad binary search, greedy, math	1200	x23475
2089B2	Canteen (Hard Version) binary search, data structures, dp, flows, greedy, two pointers	2300	x1280
2089B1	Canteen (Easy Version) binary search, data structures, flows, greedy, two pointers	1900	x3231
2086B	Large Array and Segments binary search, brute force, greedy	1100	x18978
2084E	Blossom binary search, combinatorics, dp, implementation, math, two pointers	2400	x1790
2084D	Arcology On Permafrost binary search, brute force, constructive algorithms, greedy, math	1600	x8830
2080D	Order Statistics *special problem, binary search	3400	x47
2075F	Beautiful Sequence Returns binary search, brute force, data structures, implementation	3000	x520
2075C	Two Colors binary search, combinatorics, math	1500	x14350
2072G	I've Been Flipping Numbers for 300 Years and Calculated the Sum binary search, brute force, combinatorics, divide and conquer, math, number theory	2200	x2146
2072E	Do You Love Your Hero and His Two-Hit Multi-Target Attacks? binary search, brute force, constructive algorithms, dp, geometry, greedy, math	1500	x12262
2071F	Towering Arrays binary search, data structures	2700	x332
2070C	Limited Repainting binary search, greedy	1500	x13815
2069D	Palindrome Shuffle binary search, greedy, hashing, strings, two pointers	1800	x7045
2068C	Ads binary search, greedy, two pointers	2100	x1637
2066E	Tropical Season binary search, data structures, greedy, implementation	3300	x420
2065C2	Skibidus and Fanum Tax (hard version) binary search, greedy	1300	x18783
2065C1	Skibidus and Fanum Tax (easy version) binary search, dp, greedy	1100	x27743
2064F	We Be Summing binary search, data structures, dp, two pointers	2600	x701
2064D	Eating binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers	1900	x5871
2064B	Variety is Discouraged binary search, constructive algorithms, greedy, two pointers	1100	x20106
2063D	Game With Triangles binary search, brute force, data structures, geometry, greedy, implementation, math, ternary search, two pointers	2000	x5040
2061B	Kevin and Geometry binary search, geometry	1100	x14686
2057F	Formation binary search, data structures, dp, sortings, two pointers	3300	x246
2057E2	Another Exercise on Graphs (hard version) binary search, dfs and similar, dp, dsu, graphs, shortest paths, sortings	2500	x1927
2057E1	Another Exercise on Graphs (Easy Version) binary search, brute force, dp, dsu, graphs, shortest paths, sortings	2300	x2636
2056D	Unique Median binary search, brute force, combinatorics, data structures, divide and conquer, dp	2200	x3664
2053G	Naive String Splits binary search, brute force, greedy, hashing, math, number theory, strings	3400	x226
2053D	Refined Product Optimality binary search, data structures, greedy, math, schedules, sortings	1700	x7682
2053B	Outstanding Impressionist binary search, brute force, data structures, greedy	1200	x16953
2052J	Judicious Watching binary search, greedy, sortings	2000	x1549
2051E	Best Price binary search, brute force, data structures, greedy, sortings	1600	x11947
2051D	Counting Pairs binary search, sortings, two pointers	1200	x23892
2051B	Journey binary search, math	800	x39730
2049E	Broken Queries binary search, bitmasks, brute force, constructive algorithms, implementation, interactive	2400	x1590
2048D	Kevin and Competition Memories binary search, brute force, data structures, greedy, sortings, two pointers	1600	x8305
2046C	Adventurers binary search, data structures, greedy, sortings, ternary search, two pointers	2100	x2346
2046B	Move Back at a Cost binary search, data structures, greedy, sortings	1600	x10861
2044F	Easy Demon Problem binary search, brute force, data structures, math, number theory	1900	x6032
2044E	Insane Problem binary search, greedy, implementation, math, number theory	1300	x18059
2043C	Sums on Segments binary search, brute force, data structures, dp, greedy, math	1600	x11190
2042E	Vertex Pairs binary search, brute force, data structures, dfs and similar, divide and conquer, greedy, implementation, trees	2900	x524
2041M	Selection Sort binary search, data structures, greedy, two pointers	2000	x1323
2041K	Trophic Balance Species binary search, brute force, dfs and similar, graphs	3100	x122
2041I	Auto Complete binary search, data structures, hashing, implementation, sortings, strings, trees	2300	x672
2041B	Bowling Frame binary search, brute force, math	1200	x7168
2038I	Polyathlon binary search, data structures, hashing, string suffix structures, strings	2500	x746
2038D	Divide OR Conquer binary search, bitmasks, data structures, dp, implementation	2400	x854
2038B	Make It Equal binary search, brute force, greedy, math	2100	x1907
2037F	Ardent Flames binary search, data structures, math, sortings, two pointers	2100	x2968
2036G	Library of Magic binary search, constructive algorithms, divide and conquer, interactive, math, number theory	2200	x1669
2036E	Reverse the Rivers binary search, constructive algorithms, data structures, greedy	1600	x9534
2035F	Tree Operations binary search, brute force, dfs and similar, dp, trees	2500	x1101
2035E	Monster binary search, brute force, constructive algorithms, greedy, implementation, math, ternary search	2300	x1965
2035D	Yet Another Real Number Problem binary search, data structures, divide and conquer, greedy, implementation, math	1800	x5825
2032C	Trinity binary search, math, sortings, two pointers	1400	x16160
2031F	Penchick and Even Medians binary search, constructive algorithms, interactive, probabilities	2800	x451
2031D	Penchick and Desert Rabbit binary search, data structures, dfs and similar, dp, dsu, greedy, implementation, two pointers	1700	x9671
2030F	Orangutan Approved Subarrays binary search, data structures, dp, greedy, implementation, two pointers	2400	x1176
2029C	New Rating binary search, data structures, dp, greedy	1700	x7581
2028C	Alice's Adventures in Cutting Cake binary search, dp, greedy, two pointers	1600	x9971
2028B	Alice's Adventures in Permuting binary search, implementation, math	1400	x13281
2027D2	The Endspeaker (Hard Version) binary search, data structures, dp, greedy, implementation, two pointers	2200	x1901
2027D1	The Endspeaker (Easy Version) binary search, dp, graphs, greedy, implementation, two pointers	1700	x6960
2026D	Sums of Segments binary search, data structures, dp, implementation, math	1900	x5851
2026C	Action Figures binary search, brute force, constructive algorithms, data structures, greedy, implementation	1500	x12622
2026B	Black Cells binary search, brute force, constructive algorithms, greedy	1300	x16499
2025C	New Game binary search, brute force, greedy, implementation, sortings, two pointers	1300	x19026
2025A	Two Screens binary search, greedy, strings, two pointers	800	x28557

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