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)
2 days
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Problems

#	Name
467D	Fedor and Essay dfs and similar, dp, graphs, hashing, strings	2400	x2028
467C	George and Job dp, implementation	1700	x16572
466D	Increase Sequence combinatorics, dp	2100	x3755
466C	Number of Ways binary search, brute force, data structures, dp, two pointers	1700	x41869
464D	World of Darkraft - 2 dp, probabilities	2700	x757
464C	Substitutes in Number dp	2100	x1952
463D	Gargari and Permutations dfs and similar, dp, graphs, implementation	1900	x7295
461B	Appleman and Tree dfs and similar, dp, trees	2000	x7016
459E	Pashmak and Graph dp, sortings	1900	x5971
457F	An easy problem about trees dp, games, greedy, trees	3200	x126
455C	Civilization dfs and similar, dp, dsu, ternary search, trees	2100	x6464
455B	A Lot of Games dfs and similar, dp, games, implementation, strings, trees	1900	x6839
455A	Boredom dp	1500	x71917
453D	Little Pony and Elements of Harmony dp, matrices	3000	x577
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x5399
449E	Jzzhu and Squares dp, math, number theory	2900	x305
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x6134
448C	Painting Fence divide and conquer, dp, greedy	1900	x10790
446A	DZY Loves Sequences dp, implementation, two pointers	1600	x13528
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x816
440D	Berland Federalization dp, trees	2200	x942
439E	Devu and Birthday Celebration combinatorics, dp, math	2100	x1838
437E	The Child and Polygon dp, geometry	2500	x786
436F	Banners brute force, data structures, dp	3000	x458
436D	Pudding Monsters dp	2800	x352
435D	Special Grid brute force, dp, greedy	2000	x788
433E	Tachibana Kanade's Tofu dp	2500	x532
433B	Kuriyama Mirai's Stones dp, implementation, sortings	1200	x53787
432D	Prefixes and Suffixes dp, string suffix structures, strings, two pointers	2000	x11937
431D	Random Task binary search, bitmasks, combinatorics, dp, math	2100	x2873
431C	k-Tree dp, implementation, trees	1600	x29767
429C	Guess the Tree bitmasks, constructive algorithms, dp, greedy, trees	2300	x1030
429B	Working out dp	1600	x10210
427D	Match & Catch dp, string suffix structures, strings	2200	x2423
425E	Sereja and Sets dp	2500	x803
425C	Sereja and Two Sequences data structures, dp	2300	x983
424E	Colored Jenga dfs and similar, dp, probabilities	2500	x149
424D	Biathlon Track binary search, brute force, constructive algorithms, data structures, dp	2300	x610
417D	Cunning Gena bitmasks, dp, greedy, sortings	1900	x2914
417A	Elimination dp, implementation, math	1500	x3409
416E	President's Path dp, graphs, shortest paths	2500	x1798
416C	Booking System binary search, dp, greedy, implementation	1600	x8704
416B	Art Union brute force, dp, implementation	1300	x9416
414B	Mashmokh and ACM combinatorics, dp, number theory	1400	x29160
413D	2048 bitmasks, dp	2000	x908
407D	Largest Submatrix 3 dp, hashing	2700	x804
407B	Long Path dp, implementation	1600	x7161
404D	Minesweeper 1D dp, implementation	1900	x2465
403D	Beautiful Pairs of Numbers combinatorics, dp	2300	x1234
402D	Upgrading Array dp, greedy, math, number theory	1800	x2787
401D	Roman and Numbers bitmasks, brute force, combinatorics, dp, number theory	2000	x4566
398B	Painting The Wall dp, probabilities		x1193
392B	Tower of Hanoi dp		x1053
391F1	Stock Trading dp		x225
386D	Game with Points dp, graphs, implementation, shortest paths	2100	x550
386C	Diverse Substrings dp, strings, two pointers	2000	x950
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	x10578
383E	Vowels combinatorics, divide and conquer, dp	2700	x4310
383D	Antimatter dp	2300	x3340
382E	Ksenia and Combinatorics combinatorics, dp	2600	x432
379G	New Year Cactus dp	3100	x152
379D	New Year Letter bitmasks, brute force, dp	2000	x1663
377E	Cookie Clicker dp, geometry	2800	x568
377C	Captains Mode bitmasks, dp, games	2200	x1257
375E	Red and Black Tree dp, implementation, math	3000	x492
375B	Maximum Submatrix 2 data structures, dp, implementation, sortings	1600	x5429
374D	Inna and Sequence binary search, data structures, dp, trees	2000	x991
374C	Inna and Dima dfs and similar, dp, graphs, implementation	1900	x3014
372C	Watching Fireworks is Fun data structures, dp, math	2100	x4926
372B	Counting Rectangles is Fun brute force, divide and conquer, dp	1900	x2839
370E	Summer Reading dp, greedy	2500	x320
369D	Valera and Fools dfs and similar, dp, graphs, shortest paths	2200	x1284
368B	Sereja and Suffixes data structures, dp	1100	x49878
367E	Sereja and Intervals combinatorics, dp	2700	x1389
366C	Dima and Salad dp	1900	x5875
364B	Free Market dp, greedy	2200	x1252
363B	Fence brute force, dp	1100	x67021
362C	Insertion Sort data structures, dp, implementation, math	1900	x2024
360C	Levko and Strings combinatorics, dp	2500	x1226
360B	Levko and Array binary search, dp	2000	x3493
359B	Permutation constructive algorithms, dp, math	1400	x8705
358D	Dima and Hares dp, greedy	1800	x4505
356E	Xenia and String Problem dp, hashing, implementation, string suffix structures, strings	3000	x490
356D	Bags and Coins bitmasks, constructive algorithms, dp, greedy	2700	x1091
354E	Lucky Number Representation constructive algorithms, dfs and similar, dp	2200	x911
354D	Transferring Pyramid dp	2900	x498
354C	Vasya and Beautiful Arrays brute force, dp, number theory	2100	x3332
354B	Game with Strings bitmasks, dp, games	2400	x503
353E	Antichain dp, graph matchings, greedy	2200	x672
353D	Queue constructive algorithms, dp	2000	x3187
351C	Jeff and Brackets dp, matrices	2500	x630
351B	Jeff and Furik combinatorics, dp, probabilities	1900	x2723
351A	Jeff and Rounding dp, greedy, implementation, math	1800	x3095
349B	Color the Fence data structures, dp, greedy, implementation	1700	x15114
348E	Pilgrims dfs and similar, dp, trees	2800	x512
348D	Turtles dp, matrices	2500	x2216
346D	Robot Control dp, graphs, shortest paths	2600	x841
346B	Lucky Common Subsequence dp, strings	2000	x4258
342D	Xenia and Dominoes bitmasks, dfs and similar, dp	2100	x567

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