Problemset - Codeforces

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

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Problems

#	Name
2024B	Buying Lemonade binary search, constructive algorithms, sortings	1100	x17038
2023B	Skipping binary search, dp, graphs, shortest paths	1700	x7072
2022E2	Billetes MX (Hard Version) binary search, combinatorics, data structures, dsu, graphs	2600	x707
2022E1	Billetes MX (Easy Version) 2-sat, binary search, combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2500	x759
2022D1	Asesino (Easy Version) binary search, brute force, constructive algorithms, implementation, interactive	1900	x4006
2022B	Kar Salesman binary search, greedy, math	1300	x14519
2020B	Brightness Begins binary search, math	1200	x21658
2018E2	Complex Segments (Hard Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3400	x204
2018E1	Complex Segments (Easy Version) binary search, data structures, divide and conquer, dsu, greedy, math, sortings	3300	x239
2018B	Speedbreaker binary search, data structures, dp, greedy, implementation, two pointers	1900	x5184
2014C	Robin Hood in Town binary search, greedy, math	1100	x27445
2013F2	Game in Tree (Hard Version) binary search, data structures, trees	3500	x160
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x651
2013D	Minimize the Difference binary search, greedy	1900	x7464
2009G2	Yunli's Subarray Queries (hard version) binary search, data structures, dp	2200	x1750
2009G1	Yunli's Subarray Queries (easy version) binary search, data structures, two pointers	1900	x5361
2009E	Klee's SUPER DUPER LARGE Array!!! binary search, math, ternary search	1400	x17654
2008H	Sakurako's Test binary search, brute force, greedy, math, number theory	2100	x3601
2008G	Sakurako's Task binary search, greedy, math, number theory	1800	x6667
2008C	Longest Good Array binary search, brute force, math	800	x36462
2005D	Alter the GCD binary search, brute force, data structures, divide and conquer, implementation, number theory	2400	x1243
2005B2	The Strict Teacher (Hard Version) binary search, greedy, math, sortings	1200	x21669
2004F	Make a Palindrome binary search, brute force, data structures, greedy, math	2600	x1412
2004D	Colored Portals binary search, brute force, data structures, graphs, greedy, implementation, shortest paths	1600	x13249
2002D2	DFS Checker (Hard Version) binary search, data structures, dfs and similar, graphs, hashing, trees	2300	x2864
2001C	Guess The Tree binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees	1500	x12790
2000H	Ksyusha and the Loaded Set binary search, brute force, data structures, implementation	2200	x2317
2000G	Call During the Journey binary search, brute force, graphs, greedy, shortest paths	2100	x3129
1999G2	Ruler (hard version) binary search, interactive, ternary search	1700	x11008
1999G1	Ruler (easy version) binary search, interactive	1500	x14513
1998E2	Eliminating Balls With Merging (Hard Version) binary search, brute force, data structures, divide and conquer, greedy, implementation	2500	x900
1998E1	Eliminating Balls With Merging (Easy Version) binary search, brute force, data structures, divide and conquer, greedy	2200	x2283
1998C	Perform Operations to Maximize Score binary search, brute force, constructive algorithms, greedy, implementation	1900	x7091
1997E	Level Up binary search, brute force, data structures, divide and conquer, implementation	2200	x3789
1997D	Maximize the Root binary search, dfs and similar, dp, greedy, trees	1500	x15900
1996F	Bomb binary search, greedy, math	1900	x6314
1996D	Fun binary search, brute force, combinatorics, math, number theory	1500	x19595
1996A	Legs binary search, math, ternary search	800	x57317
1995B2	Bouquet (Hard Version) binary search, data structures, greedy, math, sortings, two pointers	1700	x10144
1995B1	Bouquet (Easy Version) binary search, brute force, greedy, sortings, two pointers	1100	x20968
1994C	Hungry Games binary search, dp, two pointers	1600	x13533
1993D	Med-imize binary search, dp, greedy	2200	x4470
1990E2	Catch the Mole(Hard Version) binary search, data structures, dfs and similar, divide and conquer, interactive, trees	2600	x1108
1990E1	Catch the Mole(Easy Version) binary search, data structures, dfs and similar, interactive, trees	2500	x1139
1988E	Range Minimum Sum binary search, brute force, data structures, divide and conquer, implementation	2300	x1790
1986G1	Permutation Problem (Simple Version) binary search, brute force, combinatorics, data structures, math, number theory	2200	x1912
1985F	Final Boss binary search, data structures	1500	x19993
1983F	array-value binary search, bitmasks, data structures, greedy, two pointers	2500	x1523
1983C	Have Your Cake and Eat It Too binary search, brute force, greedy, implementation	1400	x14709
1982F	Sorting Problem Again binary search, data structures, sortings	2600	x1292
1982C	Boring Day binary search, data structures, dp, greedy, two pointers	1200	x21886
1979E	Manhattan Triangle binary search, constructive algorithms, data structures, geometry, implementation, two pointers	2400	x1808
1979C	Earning on Bets binary search, combinatorics, constructive algorithms, number theory	1200	x22181
1978B	New Bakery binary search, greedy, math, ternary search	800	x25323
1976D	Invertible Bracket Sequences binary search, combinatorics, data structures, divide and conquer, implementation, two pointers	2000	x5796
1976C	Job Interview binary search, dp, greedy, implementation, two pointers	1600	x12413
1975E	Chain Queries binary search, data structures, dfs and similar, implementation, trees	2100	x2870
1975C	Chamo and Mocha's Array binary search, brute force, greedy	1200	x17157
1974F	Cutting Game binary search, brute force, data structures, implementation, sortings, two pointers	1900	x4401
1973B	Cat, Fox and the Lonely Array binary search, bitmasks, data structures, greedy, math, two pointers	1300	x16814
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x12459
1971E	Find the Car binary search, math, sortings	1500	x18318
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1853
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x2506
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x5293
1968F	Equal XOR Segments binary search, data structures	1800	x6925
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x977
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x14936
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x610
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x664
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x24186
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2968
1952G	Mathematician Takeover *special problem, binary search, dfs and similar, math		x1223
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x104
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x358
1951B	Battle Cows binary search, data structures, greedy	1200	x16844
1949B	Charming Meals binary search, brute force, greedy, sortings	1500	x4894
1946C	Tree Cutting binary search, dp, greedy, implementation, trees	1600	x13711
1945G	Cook and Porridge binary search, constructive algorithms, data structures, implementation	2500	x907
1945E	Binary Search binary search, constructive algorithms, greedy	1700	x9712
1943E2	MEX Game 2 (Hard Version) binary search, greedy, two pointers	3300	x370
1943E1	MEX Game 2 (Easy Version) binary search, brute force, greedy	2900	x529
1942D	Learning to Paint binary search, data structures, dfs and similar, dp, greedy, implementation, sortings	2100	x3346
1941F	Rudolf and Imbalance binary search, greedy, sortings, two pointers	1800	x7402
1941E	Rudolf and k Bridges binary search, data structures, dp, two pointers	1600	x11928
1936F	Grand Finale: Circles binary search, geometry	3300	x171
1936D	Bitwise Paradox binary search, bitmasks, data structures, greedy, two pointers	3100	x625
1936B	Pinball binary search, data structures, implementation, math, two pointers	2000	x3561
1935F	Andrey's Tree binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees	2800	x609
1935D	Exam in MAC binary search, combinatorics, implementation, math	1800	x10663
1935C	Messenger in MAC binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings	1800	x9769
1934C	Find a Mine binary search, constructive algorithms, geometry, greedy, interactive, math	1700	x8071
1933E	Turtle vs. Rabbit Race: Optimal Trainings binary search, implementation, math, ternary search	1500	x13620
1930C	Lexicographically Largest binary search, constructive algorithms, data structures, greedy, sortings	1700	x8149
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x17279
1928B	Equalize binary search, greedy, sortings, two pointers	1200	x20743
1927D	Find the Different Ones! binary search, brute force, data structures, dp, dsu, greedy, two pointers	1300	x33128
1926E	Vlad and an Odd Ordering binary search, bitmasks, data structures, dp, implementation, math, number theory	1500	x14834
1923F	Shrink-Reverse binary search, brute force, greedy, hashing, implementation, string suffix structures, strings	2800	x535
1923D	Slimes binary search, constructive algorithms, data structures, greedy, two pointers	1800	x8349

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