Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
18:56:15
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
18:56:15
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Problems

#	Name
407D	Largest Submatrix 3 dp, hashing	2700	x804
407C	Curious Array brute force, combinatorics, implementation, math	2500	x1193
407B	Long Path dp, implementation	1600	x7162
407A	Triangle brute force, geometry, implementation, math	1600	x5172
406E	Hamming Triples implementation, math, two pointers	2800	x272
406D	Hill Climbing dfs and similar, geometry, trees	2200	x1281
405E	Graph Cutting dfs and similar, graphs	2300	x1602
405D	Toy Sum greedy, implementation, math	1700	x3287
405C	Unusual Product implementation, math	1600	x4933
404E	Maze 1D binary search, greedy, implementation	2200	x642
404D	Minesweeper 1D dp, implementation	1900	x2465
404C	Restore Graph dfs and similar, graphs, sortings	1800	x5787
404B	Marathon implementation, math	1500	x3050
403E	Two Rooted Trees data structures, implementation, trees	2900	x242
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1234
402E	Strictly Positive Matrix graphs, math	2200	x2329
402D	Upgrading Array dp, greedy, math, number theory	1800	x2787
402C	Searching for Graph brute force, constructive algorithms, graphs	1500	x6367
402B	Trees in a Row brute force, implementation	1400	x3993
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4571
401C	Team constructive algorithms, greedy, implementation	1400	x21699
400E	Inna and Binary Logic binary search, bitmasks, data structures	2100	x1043
400D	Dima and Bacteria dsu, graphs, shortest paths	2000	x3171
400C	Inna and Huge Candy Matrix implementation, math	1500	x3010
388E	Fox and Meteor Shower geometry	3100	x133
388D	Fox and Perfect Sets math	2700	x497
388C	Fox and Card Game games, greedy, sortings	2000	x3818
388B	Fox and Minimal path bitmasks, constructive algorithms, graphs, implementation, math	1900	x2603
388A	Fox and Box Accumulation greedy, sortings	1400	x11939
387E	George and Cards binary search, data structures	2200	x989
387D	George and Interesting Graph graph matchings	2200	x1169
387C	George and Number greedy, implementation	1700	x2286
386D	Game with Points dp, graphs, implementation, shortest paths	2100	x550
386C	Diverse Substrings dp, strings, two pointers	2000	x950
386B	Fly, freebies, fly! binary search, brute force, implementation	1400	x2528
385E	Bear in the Field math, matrices	2300	x666
385D	Bear and Floodlight bitmasks, dp, geometry	2200	x944
385C	Bear and Prime Numbers binary search, brute force, data structures, dp, implementation, math, number theory	1700	x10586
384B	Multitasking greedy, implementation, sortings, two pointers	1500	x3803
383E	Vowels combinatorics, divide and conquer, dp	2700	x4313
383D	Antimatter dp	2300	x3341
383C	Propagating tree data structures, dfs and similar, trees	2000	x7522
383B	Volcanoes binary search, implementation, sortings, two pointers	2500	x783
383A	Milking cows data structures, greedy	1600	x5569
382E	Ksenia and Combinatorics combinatorics, dp	2600	x432
382D	Ksenia and Pawns dfs and similar, graphs, implementation, trees	2200	x727
382C	Arithmetic Progression implementation, sortings	1700	x8733
382B	Number Busters binary search, math	2000	x1505
380E	Sereja and Dividing data structures	2600	x351
380D	Sereja and Cinema combinatorics, math	2500	x522
380C	Sereja and Brackets data structures, schedules	2000	x19778
380B	Sereja and Tree graphs, implementation	2400	x575
380A	Sereja and Prefixes binary search, brute force	1600	x2909
379G	New Year Cactus dp	3100	x152
379F	New Year Tree data structures, divide and conquer, trees	2400	x2752
379E	New Year Tree Decorations geometry, schedules, sortings	2500	x379
379D	New Year Letter bitmasks, brute force, dp	2000	x1663
379C	New Year Ratings Change greedy, sortings	1400	x7047
377E	Cookie Clicker dp, geometry	2800	x568
377D	Developing Game data structures	2400	x1339
377C	Captains Mode bitmasks, dp, games	2200	x1258
377B	Preparing for the Contest binary search, data structures, greedy, sortings	1900	x2448
377A	Maze dfs and similar	1600	x27048
375E	Red and Black Tree dp, implementation, math	3000	x493
375D	Tree and Queries data structures, dfs and similar, trees	2400	x8914
375C	Circling Round Treasures bitmasks, shortest paths	2600	x634
375B	Maximum Submatrix 2 data structures, dp, implementation, sortings	1600	x5430
375A	Divisible by Seven math, number theory	1600	x5343
374E	Inna and Babies binary search, data structures, dsu, geometry, implementation	2600	x206
374D	Inna and Sequence binary search, data structures, dp, trees	2000	x991
374C	Inna and Dima dfs and similar, dp, graphs, implementation	1900	x3014
374B	Inna and Nine combinatorics, greedy	1500	x3489
374A	Inna and Pink Pony greedy, implementation	2000	x3094
373B	Making Sequences is Fun binary search, implementation, math	1600	x2795
372E	Drawing Circles is Fun combinatorics, geometry	3000	x189
372D	Choosing Subtree is Fun binary search, data structures, dfs and similar, trees, two pointers	2600	x1129
372C	Watching Fireworks is Fun data structures, dp, math	2100	x4932
372B	Counting Rectangles is Fun brute force, divide and conquer, dp	1900	x2839
372A	Counting Kangaroos is Fun binary search, greedy, sortings, two pointers	1600	x15592
371E	Subway Innovation greedy, math, two pointers	2000	x1439
371D	Vessels data structures, dsu, implementation, trees	1800	x6476
371C	Hamburgers binary search, brute force	1600	x34492
370E	Summer Reading dp, greedy	2500	x320
370D	Broken Monitor brute force, constructive algorithms, greedy, implementation	2100	x704
370C	Mittens constructive algorithms, greedy, sortings	1800	x1717
369E	Valera and Queries binary search, data structures	2200	x2782
369D	Valera and Fools dfs and similar, dp, graphs, shortest paths	2200	x1284
369C	Valera and Elections dfs and similar, graphs, trees	1600	x12032
369B	Valera and Contest constructive algorithms, implementation, math	1400	x6857
367E	Sereja and Intervals combinatorics, dp	2700	x1389
367D	Sereja and Sets bitmasks, dfs and similar	2400	x688
367C	Sereja and the Arrangement of Numbers graphs, greedy, sortings	2000	x1924
367B	Sereja ans Anagrams binary search, data structures	1900	x2680
367A	Sereja and Algorithm data structures, implementation	1500	x4546
366E	Dima and Magic Guitar brute force, implementation, math	2200	x844
366D	Dima and Trap Graph binary search, data structures, dfs and similar, dsu, shortest paths, two pointers	2000	x1722
366C	Dima and Salad dp	1900	x5877
364E	Empty Rectangles divide and conquer, two pointers	3000	x627
364D	Ghd brute force, math, probabilities	2900	x2508
364C	Beautiful Set brute force, number theory	2300	x641

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