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
1415D	XOR-gun bitmasks, brute force, constructive algorithms	2000	x6158
1415C	Bouncing Ball brute force, dp, implementation	1400	x11732
1415B	Repainting Street brute force, brute force, greedy	1100	x12530
1415A	Prison Break brute force, math	800	x15868
1413F	Roads and Ramen data structures, trees	2800	x959
1413E	Solo mid Oracle greedy, math, ternary search	2100	x2181
1413D	Shurikens data structures, greedy, implementation	1700	x6915
1413C	Perform Easily binary search, brute force, dp, implementation, sortings, two pointers	1900	x6265
1413B	A New Technique implementation	1100	x12013
1413A	Finding Sasuke constructive algorithms, math	800	x15289
1411G	No Game No Life bitmasks, games, math, matrices	2700	x889
1411F	The Thorny Path greedy, math	3000	x436
1411E	Poman Numbers bitmasks, greedy, math, strings	2300	x1828
1411D	Grime Zoo brute force, greedy, implementation, strings	2100	x2715
1411C	Peaceful Rooks dfs and similar, dsu, graphs	1700	x8576
1411B	Fair Numbers brute force, number theory	1000	x30279
1411A	In-game Chat implementation	800	x21747
1409F	Subsequences of Length Two dp, strings	2100	x5118
1409E	Two Platforms binary search, dp, sortings, two pointers	1800	x8455
1409D	Decrease the Sum of Digits greedy, math	1500	x21380
1409C	Yet Another Array Restoration brute force, math, number theory	1200	x24636
1409B	Minimum Product brute force, greedy, math	1100	x30916
1409A	Yet Another Two Integers Problem greedy, math	800	x80367
1408I	Bitwise Magic dp, math	3200	x199
1408H	Rainbow Triples binary search, data structures, flows, greedy	3300	x551
1408G	Clusterization Counting combinatorics, dp, dsu, fft, graphs, trees	2700	x1297
1408F	Two Different constructive algorithms, divide and conquer	2300	x2679
1408E	Avoid Rainbow Cycles data structures, dsu, graphs, greedy, sortings, trees	2400	x2182
1408D	Searchlights binary search, brute force, data structures, dp, implementation, sortings, two pointers	2000	x4672
1408C	Discrete Acceleration binary search, dp, implementation, math, two pointers	1500	x9271
1408B	Arrays Sum constructive algorithms, greedy, math	1400	x10453
1408A	Circle Coloring constructive algorithms	800	x12784
1407E	Egor in the Republic of Dagestan constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths	2500	x1903
1407D	Discrete Centrifugal Jumps data structures, dp, graphs	2200	x5698
1407C	Chocolate Bunny constructive algorithms, interactive, math, two pointers	1600	x14777
1407B	Big Vova brute force, greedy, math, number theory	1300	x18064
1407A	Ahahahahahahahaha constructive algorithms, math	1100	x21354
1406E	Deleting Numbers interactive, math, number theory	2600	x1877
1406D	Three Sequences constructive algorithms, data structures, greedy, math	2200	x3812
1406C	Link Cut Centroids constructive algorithms, dfs and similar, graphs, trees	1700	x11769
1406B	Maximum Product brute force, dp, greedy, implementation, sortings	1200	x24448
1406A	Subset Mex greedy, implementation, math	900	x22941
1405B	Array Cancellation constructive algorithms, implementation	1000	x23025
1405A	Permutation Forgery constructive algorithms	800	x21905
1404E	Bricks flows, graph matchings, graphs	2800	x1577
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x1270
1404C	Fixed Point Removal binary search, constructive algorithms, data structures, greedy, two pointers	2300	x3048
1404B	Tree Tag dfs and similar, dp, games, trees	1900	x8179
1404A	Balanced Bitstring implementation, strings	1500	x19383
1403C	Chess Rush *special problem, combinatorics, dp, implementation, math	3200	x75
1403B	Spring cleaning *special problem, data structures, dfs and similar, graphs, trees	2300	x394
1403A	The Potion of Great Power *special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers	2400	x312
1402C	Star Trek *special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees	2600	x233
1402B	Roads *special problem, geometry, sortings	2900	x129
1402A	Fancy Fence *special problem, data structures, dsu, implementation, math, sortings	1800	x1352
1401F	Reverse and Swap binary search, bitmasks, data structures	2400	x1953
1401E	Divide Square data structures, geometry, implementation, sortings	2400	x2637
1401D	Maximum Distributed Tree dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees	1800	x10525
1401C	Mere Array constructive algorithms, math, number theory, sortings	1300	x26819
1401B	Ternary Sequence constructive algorithms, greedy, math	1100	x21777
1401A	Distance and Axis constructive algorithms, math	900	x28633
1400G	Mercenaries bitmasks, brute force, combinatorics, dp, dsu, math, two pointers	2600	x1159
1400F	x-prime Substrings brute force, dfs and similar, dp, string suffix structures, strings	2800	x1163
1400E	Clear the Multiset data structures, divide and conquer, dp, greedy	2200	x6305
1400D	Zigzags brute force, combinatorics, data structures, math, two pointers	1900	x11386
1400C	Binary String Reconstruction 2-sat, brute force, constructive algorithms, greedy	1500	x18498
1400B	RPG Protagonist brute force, greedy, math	1700	x11693
1400A	String Similarity constructive algorithms, strings	800	x27966
1399F	Yet Another Segments Subset data structures, dp, graphs, sortings	2300	x1869
1399E2	Weights Division (hard version) binary search, dfs and similar, greedy, sortings, trees, two pointers	2200	x2524
1399E1	Weights Division (easy version) data structures, dfs and similar, greedy, trees	2000	x6336
1399D	Binary String To Subsequences constructive algorithms, data structures, greedy, implementation	1500	x19895
1399C	Boats Competition brute force, greedy, two pointers	1200	x32631
1399B	Gifts Fixing greedy	800	x46785
1399A	Remove Smallest greedy, sortings	800	x80519
1398G	Running Competition bitmasks, fft, math, number theory	2600	x1280
1398F	Controversial Rounds binary search, data structures, dp, greedy, two pointers	2500	x1392
1398E	Two Types of Spells binary search, data structures, greedy, implementation, math, sortings	2200	x2597
1398D	Colored Rectangles dp, greedy, sortings	1800	x12538
1398C	Good Subarrays data structures, dp, math	1600	x36382
1398B	Substring Removal Game games, greedy, sortings	800	x25892
1398A	Bad Triangle geometry, math	800	x28787
1397B	Power Sequence brute force, math, number theory, sortings	1500	x15462
1397A	Juggling Letters greedy, strings	800	x29820
1396E	Distance Matching constructive algorithms, dfs and similar, trees	3200	x434
1396D	Rainbow Rectangles data structures, sortings, two pointers	3300	x343
1396C	Monster Invaders dp, greedy, implementation	2300	x2784
1396B	Stoned Game brute force, constructive algorithms, games, greedy	1800	x12921
1396A	Multiples of Length constructive algorithms, greedy, number theory	1600	x16682
1395C	Boboniu and Bit Operations bitmasks, brute force, dp, greedy	1600	x15207
1395B	Boboniu Plays Chess constructive algorithms	1100	x16393
1395A	Boboniu Likes to Color Balls brute force, math	1000	x25493
1394E	Boboniu and Banknote Collection strings	3500	x164
1394D	Boboniu and Jianghu dp, greedy, sortings, trees	2800	x1225
1394C	Boboniu and String binary search, geometry, ternary search	2600	x1223
1394B	Boboniu Walks on Graph brute force, dfs and similar, graphs, hashing	2300	x2145
1394A	Boboniu Chats with Du dp, greedy, sortings, two pointers	1800	x7116
1393E2	Twilight and Ancient Scroll (harder version) dp, hashing, implementation, string suffix structures, strings, two pointers	3200	x439
1393E1	Twilight and Ancient Scroll (easier version) dp, hashing, implementation, string suffix structures, strings	2800	x446
1393D	Rarity and New Dress dfs and similar, dp, implementation, shortest paths	2100	x4189

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