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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Problems

#	Name
1609D	Social Network dsu, graphs, greedy, implementation, trees	1600	x8392
1609C	Complex Market Analysis binary search, dp, implementation, number theory, schedules, two pointers	1400	x10458
1609B	William the Vigilant implementation, strings	1100	x12145
1609A	Divide and Multiply greedy, implementation, math, number theory	900	x18890
1608G	Alphabetic Tree binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees	3500	x244
1608F	MEX counting combinatorics, dp, implementation	3200	x837
1608E	The Cells on the Paper binary search, implementation, sortings	2800	x485
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1556
1608C	Game Master data structures, dfs and similar, dp, graphs, greedy, two pointers	1700	x7364
1608B	Build the Permutation constructive algorithms, greedy	1200	x12481
1608A	Find Array constructive algorithms, math	800	x20252
1607H	Banquet Preparations 2 greedy, sortings, two pointers	2200	x1422
1607G	Banquet Preparations 1 greedy	2200	x1743
1607F	Robot on the Board 2 brute force, dfs and similar, graphs, implementation	2300	x2127
1607E	Robot on the Board 1 implementation	1600	x10013
1607D	Blue-Red Permutation greedy, math, sortings	1300	x18123
1607C	Minimum Extraction brute force, sortings	1000	x26827
1607B	Odd Grasshopper math	900	x39395
1607A	Linear Keyboard implementation, strings	800	x40677
1606F	Tree Queries brute force, dp, trees	2800	x661
1606E	Arena combinatorics, dp, math	2100	x4183
1606D	Red-Blue Matrix brute force, constructive algorithms, implementation, sortings	2400	x1578
1606C	Banknotes greedy, number theory	1400	x15209
1606B	Update Files greedy, implementation, math	1100	x19508
1606A	AB Balance strings	900	x37424
1605F	PalindORme combinatorics, dp	2900	x431
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x1182
1605D	Treelabeling bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees	2100	x3248
1605C	Dominant Character brute force, greedy, implementation, strings	1400	x18850
1605B	Reverse Sort greedy, sortings	1000	x19293
1605A	A.M. Deviation math, number theory	800	x21643
1604B	XOR Specia-LIS-t	1100	x16296
1604A	Era greedy	800	x22635
1603F	October 18, 2017 combinatorics, dp, implementation, math	2700	x348
1603E	A Perfect Problem combinatorics, dp, math	3200	x639
1603D	Artistic Partition divide and conquer, dp, number theory	3000	x884
1603C	Extreme Extension dp, greedy, math, number theory	2300	x2265
1603B	Moderate Modular Mode constructive algorithms, math, number theory	1600	x15072
1603A	Di-visible Confusion constructive algorithms, math, number theory	1300	x17822
1602B	Divine Array constructive algorithms, implementation	1100	x14744
1602A	Two Subsequences implementation	800	x19721
1601F	Two Sorts binary search, dfs and similar, math, meet-in-the-middle	3400	x275
1601E	Phys Ed Online data structures, dp, greedy	2900	x597
1601D	Difficult Mountain data structures, dp, greedy, sortings	2700	x1941
1601C	Optimal Insertion data structures, divide and conquer, dp, greedy, sortings	2300	x2344
1601B	Frog Traveler data structures, dfs and similar, dp, graphs, shortest paths, two pointers	1900	x5502
1601A	Array Elimination bitmasks, greedy, math, number theory	1300	x21048
1600J	Robot Factory bitmasks, dfs and similar	1400	x4416
1600F	Party Organization brute force, math, probabilities	2300	x615
1600E	Array Game games, greedy, two pointers	1900	x2382
1599J	Bob's Beautiful Array bitmasks, brute force, greedy	2600	x328
1599I	Desert data structures, graphs	2700	x132
1599H	Hidden Fortress interactive, math	2100	x1276
1599G	Shortest path brute force, geometry, math, shortest paths	2700	x408
1599F	Mars hashing	2700	x409
1599E	Two Arrays data structures, matrices	3200	x89
1599D	Bubble Popping	3200	x34
1599C	Bubble Strike combinatorics, math, probabilities, ternary search	2000	x1972
1599B	Restaurant Game	3100	x160
1599A	Weights constructive algorithms, greedy, two pointers	2600	x868
1598G	The Sum of Good Numbers hashing, math, string suffix structures, strings	3200	x405
1598F	RBS binary search, bitmasks, brute force, data structures, dp	2400	x1631
1598E	Staircases brute force, combinatorics, data structures, dfs and similar, dp, implementation, math	2100	x2496
1598D	Training Session combinatorics, data structures, geometry, implementation, math	1700	x10476
1598C	Delete Two Elements data structures, dp, implementation, math, two pointers	1200	x23632
1598B	Groups brute force, implementation	1000	x16935
1598A	Computer Game brute force, dfs and similar, dp, implementation	800	x25629
1594F	Ideal Farm constructive algorithms, math	2400	x1537
1594E2	Rubik's Cube Coloring (hard version) brute force, dp, implementation, math, trees	2300	x1610
1594E1	Rubik's Cube Coloring (easy version) combinatorics, math	1300	x12188
1594D	The Number of Imposters constructive algorithms, dfs and similar, dp, dsu, graphs	1700	x9383
1594C	Make Them Equal brute force, greedy, math, strings	1200	x28283
1594B	Special Numbers bitmasks, math	1100	x22132
1594A	Consecutive Sum Riddle math	800	x27106
1593G	Changing Brackets constructive algorithms, data structures, dp, greedy	2200	x1889
1593F	Red-Black Number dfs and similar, dp, implementation, math, meet-in-the-middle	2100	x2655
1593E	Gardener and Tree brute force, data structures, dfs and similar, greedy, implementation, trees	1600	x14716
1593D2	Half of Same brute force, math, number theory	1900	x5566
1593D1	All are Same math, number theory	1100	x21789
1593C	Save More Mice binary search, greedy, greedy	1000	x27873
1593B	Make it Divisible by 25 dfs and similar, dp, greedy, math, math	900	x40578
1593A	Elections math	800	x41515
1592F2	Alice and Recoloring 2 constructive algorithms, flows, graph matchings, greedy	2800	x971
1592F1	Alice and Recoloring 1 constructive algorithms, greedy	2600	x1081
1592E	Bored Bakry bitmasks, greedy, math, two pointers	2400	x1920
1592D	Hemose in ICPC ? binary search, dfs and similar, implementation, interactive, math, number theory, trees	2300	x2568
1592C	Bakry and Partitioning bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees	1700	x9129
1592B	Hemose Shopping constructive algorithms, dsu, math, sortings	1200	x17139
1592A	Gamer Hemose binary search, greedy, math, sortings	800	x23774
1588F	Jumping Through the Array binary search, data structures, graphs, two pointers	3500	x354
1586I	Omkar and Mosaic combinatorics, constructive algorithms, math	3500	x298
1585G	Poachers dp, games, graphs, trees	2500	x310
1585F	Non-equal Neighbours combinatorics, dp, math	2400	x1672
1585E	Frequency Queries data structures, dfs and similar, trees	2400	x1207
1585D	Yet Another Sorting Problem data structures, math	1900	x4383
1585C	Minimize Distance greedy	1300	x12816
1585B	Array Eversion greedy	900	x16131
1585A	Life of a Flower implementation	800	x18913
1584G	Eligible Segments geometry	3200	x246
1584F	Strange LCS bitmasks, dp, graphs, greedy, strings	2600	x1115

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