Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
10:50:50
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
10:50:50
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Problems

#	Name
1548B	Integers Have Friends binary search, data structures, divide and conquer, math, number theory, two pointers	1800	x11348
1548A	Web of Lies brute force, graphs, greedy	1400	x17732
1547G	How Many Paths? dfs and similar, dp, graphs, trees	2100	x3549
1547F	Array Stabilization (GCD version) binary search, brute force, data structures, divide and conquer, number theory, two pointers	1900	x6952
1547E	Air Conditioners data structures, dp, implementation, shortest paths, sortings, two pointers	1500	x16373
1547D	Co-growing Sequence bitmasks, constructive algorithms, greedy	1300	x18588
1547C	Pair Programming greedy, two pointers	1100	x24416
1547B	Alphabetical Strings greedy, implementation, strings	800	x27901
1547A	Shortest Path with Obstacle implementation, math	800	x32287
1546B	AquaMoon and Stolen String interactive, math	1200	x13953
1546A	AquaMoon and Two Arrays brute force, greedy	800	x18588
1545F	AquaMoon and Potatoes brute force, data structures, dp	3500	x130
1545E2	AquaMoon and Time Stop (hard version) data structures, dp	3500	x100
1545E1	AquaMoon and Time Stop (easy version) data structures, dp	3500	x100
1545D	AquaMoon and Wrong Coordinate constructive algorithms, interactive, math	3000	x606
1545C	AquaMoon and Permutations 2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs	2800	x767
1545B	AquaMoon and Chess combinatorics, math	1900	x6762
1545A	AquaMoon and Strange Sort sortings	1500	x14882
1543E	The Final Pursuit bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math	2700	x451
1543D2	RPD and Rap Sheet (Hard Version) brute force, constructive algorithms, interactive, math	2200	x2168
1543D1	RPD and Rap Sheet (Easy Version) bitmasks, constructive algorithms, interactive, math	1700	x8000
1543C	Need for Pink Slips bitmasks, brute force, dfs and similar, implementation, math, probabilities	1900	x5625
1543B	Customising the Track combinatorics, greedy, math	900	x24477
1543A	Exciting Bets greedy, math, number theory	900	x40948
1542E2	Abnormal Permutation Pairs (hard version) combinatorics, dp, fft, math	2700	x1015
1542E1	Abnormal Permutation Pairs (easy version) combinatorics, dp, fft, math	2400	x1437
1542D	Priority Queue combinatorics, dp, implementation, math, ternary search	2200	x2921
1542C	Strange Function math, number theory	1600	x16182
1542B	Plus and Multiply constructive algorithms, math, number theory	1500	x26537
1542A	Odd Set math	800	x51633
1541B	Pleasant Pairs brute force, implementation, math, number theory	1200	x38479
1541A	Pretty Permutations constructive algorithms, greedy, implementation	800	x30716
1540E	Tasty Dishes math, matrices	3500	x134
1540D	Inverse Inversions binary search, brute force, data structures	3200	x385
1540C2	Converging Array (Hard Version) dp, math	2900	x559
1540C1	Converging Array (Easy Version) dp, math	2700	x750
1540B	Tree Array brute force, combinatorics, dp, graphs, math, probabilities, trees	2300	x2989
1540A	Great Graphs constructive algorithms, graphs, greedy, shortest paths, sortings	1400	x14987
1539F	Strange Array data structures, greedy, sortings	2600	x984
1539E	Game with Cards binary search, constructive algorithms, data structures, dp, greedy, implementation	2500	x1055
1539D	PriceFixed binary search, greedy, implementation, sortings, two pointers	1600	x12723
1539C	Stable Groups greedy, sortings	1200	x31461
1539B	Love Song dp, implementation, strings	800	x26748
1539A	Contest Start combinatorics, geometry, greedy, math	1000	x21526
1538G	Gift Set binary search, greedy, math, ternary search	2100	x5214
1538F	Interesting Function binary search, dp, math, number theory	1500	x22215
1538E	Funny Substrings data structures, hashing, implementation, matrices, strings	2100	x3222
1538D	Another Problem About Dividing Numbers constructive algorithms, math, number theory	1700	x15267
1538C	Number of Pairs binary search, data structures, math, two pointers	1300	x34400
1538B	Friends and Candies greedy, math	800	x33537
1538A	Stone Game brute force, dp, greedy	800	x40401
1537F	Figure Fixing constructive algorithms, dfs and similar, dsu, graphs, greedy, math	2200	x2815
1537E2	Erase and Extend (Hard Version) binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers	2200	x6162
1537E1	Erase and Extend (Easy Version) binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers	1600	x16313
1537D	Deleting Divisors games, math, number theory	1700	x13613
1537C	Challenging Cliffs constructive algorithms, greedy, implementation, math	1200	x30281
1537B	Bad Boy constructive algorithms, greedy, math	900	x42302
1537A	Arithmetic Array greedy, math	800	x40982
1536F	Omkar and Akmar chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures	2600	x1102
1536E	Omkar and Forest combinatorics, graphs, math, shortest paths	2300	x2734
1536D	Omkar and Medians data structures, greedy, implementation	2000	x5058
1536C	Diluc and Kaeya data structures, dp, hashing, number theory	1500	x16120
1536B	Prinzessin der Verurteilung brute force, constructive algorithms, strings	1200	x25027
1536A	Omkar and Bad Story brute force, constructive algorithms	800	x20771
1535F	String Distance binary search, brute force, data structures, hashing, implementation, strings	3000	x605
1535E	Gold Transfer binary search, data structures, dp, greedy, interactive, trees	2200	x3066
1535D	Playoff Tournament data structures, dfs and similar, dp, implementation, trees	1800	x8494
1535C	Unstable String binary search, dp, greedy, implementation, strings, two pointers	1400	x17724
1535B	Array Reodering brute force, greedy, math, number theory, sortings	900	x34199
1535A	Fair Playoff brute force, implementation	800	x57153
1534H	Lost Nodes constructive algorithms, dp, graphs, interactive, sortings, trees	3500	x255
1534G	A New Beginning data structures, dp, geometry, sortings	3300	x848
1534F2	Falling Sand (Hard Version) dfs and similar, dp, graphs, greedy	3000	x705
1534F1	Falling Sand (Easy Version) dfs and similar, graphs, greedy	2500	x1400
1534E	Lost Array graphs, greedy, interactive, shortest paths	2300	x2078
1534D	Lost Tree constructive algorithms, interactive, trees	1800	x6810
1534C	Little Alawn's Puzzle combinatorics, dp, dsu, graphs, math	1300	x13811
1534B	Histogram Ugliness greedy, implementation, math	1100	x12873
1534A	Colour the Flag brute force, implementation	800	x13175
1533J	Pawns *special problem		x52
1533I	Excursions *special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs		x61
1533H	Submatrices *special problem, bitmasks, data structures, dp		x92
1533G	Biome Map *special problem, constructive algorithms, dfs and similar, graphs		x98
1533F	Binary String Partition *special problem, binary search, greedy		x224
1533E	Chess Team Forming *special problem, binary search, data structures, greedy		x285
1533D	String Searching *special problem, hashing		x514
1533C	Sweets *special problem, data structures, implementation		x484
1533B	Nearest Point Function *special problem, implementation		x816
1533A	Travel to Bertown *special problem, implementation, math		x1130
1532F	Prefixes and Suffixes *special problem, strings		x219
1532E	Good Array *special problem		x392
1532D	Teams Forming *special problem, sortings		x590
1532C	Uniform String *special problem, implementation		x641
1532B	Frog Jumping *special problem, math		x829
1532A	A+B (Trial Problem) *special problem		x1150
1531E3	Сортировка слиянием *special problem, binary search		x271
1531E2	Сортировка слиянием special problem, special problem, brute force		x340
1531E1	Сортировка слиянием *special problem		x362
1531D	Редактируем Зингер \| color special problem, special problem		x370
1531C	Симметричный амфитеатр *special problem, constructive algorithms, dp		x659

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