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
459A	Pashmak and Garden implementation	1200	x36396
457F	An easy problem about trees dp, games, greedy, trees	3200	x126
457E	Flow Optimality constructive algorithms, flows, math	3000	x121
457D	Bingo! combinatorics, math, probabilities	2700	x390
457C	Elections brute force	2100	x945
457B	Distributed Join greedy	1900	x1210
457A	Golden System math, meet-in-the-middle	1700	x1402
456B	Fedya and Maths math, number theory	1200	x18564
456A	Laptops sortings	1100	x56752
455E	Function data structures	2900	x786
455D	Serega and Fun data structures	2700	x3655
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
454B	Little Pony and Sort by Shift implementation	1200	x19164
454A	Little Pony and Crystal Mine implementation	800	x16119
453E	Little Pony and Lord Tirek data structures	3100	x911
453D	Little Pony and Elements of Harmony dp, matrices	3000	x577
453C	Little Pony and Summer Sun Celebration constructive algorithms, dfs and similar, graphs	2200	x1742
453B	Little Pony and Harmony Chest bitmasks, brute force, dp	2000	x5399
453A	Little Pony and Expected Maximum probabilities	1600	x12432
452F	Permutation data structures, divide and conquer, hashing	2700	x1794
452E	Three strings data structures, dsu, string suffix structures, strings	2400	x1197
452D	Washer, Dryer, Folder greedy, implementation	1900	x1666
452C	Magic Trick combinatorics, math, probabilities	2100	x1750
452B	4-point polyline brute force, constructive algorithms, geometry, trees	1800	x2117
452A	Eevee brute force, implementation, strings	1000	x8513
451E	Devu and Flowers bitmasks, combinatorics, number theory	2300	x4540
451D	Count Good Substrings math	2000	x5061
451C	Predict Outcome of the Game brute force, implementation, math	1700	x3579
451B	Sort the Array implementation, sortings	1300	x52822
451A	Game With Sticks implementation	900	x75666
450B	Jzzhu and Sequences implementation, math	1300	x28822
450A	Jzzhu and Children implementation	1000	x44324
449E	Jzzhu and Squares dp, math, number theory	2900	x305
449D	Jzzhu and Numbers bitmasks, combinatorics, dp	2400	x6134
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2527
449B	Jzzhu and Cities graphs, greedy, shortest paths	2000	x10587
449A	Jzzhu and Chocolate greedy, math	1700	x4126
448E	Divisors brute force, dfs and similar, implementation, number theory	2200	x1635
448D	Multiplication Table binary search, brute force	1800	x16661
448C	Painting Fence divide and conquer, dp, greedy	1900	x10790
448B	Suffix Structures implementation, strings	1400	x17313
448A	Rewards implementation	800	x25900
447B	DZY Loves Strings greedy, implementation	1000	x21023
447A	DZY Loves Hash implementation	800	x10282
446E	DZY Loves Bridges math, matrices	3100	x143
446D	DZY Loves Games math, matrices, probabilities	2800	x466
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3929
446B	DZY Loves Modification brute force, data structures, greedy	2000	x3856
446A	DZY Loves Sequences dp, implementation, two pointers	1600	x13528
445B	DZY Loves Chemistry dfs and similar, dsu, greedy	1400	x14749
445A	DZY Loves Chessboard dfs and similar, implementation	1200	x33654
444E	DZY Loves Planting binary search, dsu, trees	2700	x856
444D	DZY Loves Strings binary search, hashing, strings, two pointers	2500	x862
444C	DZY Loves Colors data structures	2400	x3359
444B	DZY Loves FFT probabilities	2300	x1175
444A	DZY Loves Physics greedy, math	1600	x3578
443B	Kolya and Tandem Repeat brute force, implementation, strings	1500	x4274
443A	Anton and Letters constructive algorithms, implementation	800	x111979
442E	Gena and Second Distance geometry	3100	x195
442D	Adam and Tree data structures, trees	2600	x1131
442C	Artem and Array data structures, greedy	2500	x1950
442B	Andrey and Problem greedy, math, probabilities	1800	x6108
442A	Borya and Hanabi bitmasks, brute force, implementation	1700	x2352
441E	Valera and Number bitmasks, dp, math, probabilities	2400	x816
441D	Valera and Swaps constructive algorithms, dsu, graphs, implementation, math, string suffix structures	2100	x1200
441C	Valera and Tubes constructive algorithms, dfs and similar, implementation	1500	x11921
441B	Valera and Fruits greedy, implementation	1400	x7510
441A	Valera and Antique Items implementation	1000	x19290
440D	Berland Federalization dp, trees	2200	x942
440C	One-Based Arithmetic brute force, dfs and similar, divide and conquer	1800	x1139
440B	Balancer greedy, implementation	1600	x2325
440A	Forgotten Episode implementation	800	x8918
439E	Devu and Birthday Celebration combinatorics, dp, math	2100	x1838
439D	Devu and his Brother binary search, sortings, ternary search, two pointers	1700	x6846
439C	Devu and Partitioning of the Array brute force, constructive algorithms, implementation, number theory	1700	x4170
439B	Devu, the Dumb Guy implementation, sortings	1200	x15017
439A	Devu, the Singer and Churu, the Joker greedy, implementation	900	x26621
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x2130
438D	The Child and Sequence data structures, math	2300	x11583
437E	The Child and Polygon dp, geometry	2500	x786
437D	The Child and Zoo dsu, sortings	1900	x3667
437C	The Child and Toy graphs, greedy, sortings	1400	x14992
437B	The Child and Set bitmasks, greedy, implementation, sortings	1500	x10447
437A	The Child and Homework implementation	1300	x9360
436F	Banners brute force, data structures, dp	3000	x458
436E	Cardboard Box data structures, greedy	2600	x1822
436D	Pudding Monsters dp	2800	x352
436C	Dungeons and Candies dsu, graphs, greedy, trees	1800	x2886
436B	Om Nom and Spiders implementation, math	1400	x3147
436A	Feed with Candy greedy	1500	x3788
435E	Special Graph	2500	x259
435D	Special Grid brute force, dp, greedy	2000	x788
435C	Cardiogram implementation	1600	x2724
435B	Pasha Maximizes greedy	1400	x7560
435A	Queue on Bus Stop implementation	1000	x11084
434E	Furukawa Nagisa's Tree binary search, divide and conquer, sortings, trees	3000	x311
434D	Nanami's Power Plant flows	2900	x518
433E	Tachibana Kanade's Tofu dp	2500	x532

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