Problemset - Codeforces

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Codeforces Round (Div. 1, Based on Zhili Cup 2026)
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Codeforces Round (Div. 2, Based on Zhili Cup 2026)
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Problems

#	Name
1023G	Pisces data structures, flows, trees	3400	x188
1016D	Vasya And The Matrix constructive algorithms, flows, math	1800	x4985
1009G	Allowed Letters bitmasks, flows, graph matchings, graphs, greedy	2400	x1063
976F	Minimal k-covering flows, graphs	2500	x667
965D	Single-use Stones binary search, flows, greedy, two pointers	1900	x3345
925F	Parametric Circulation binary search, flows	3100	x168
903G	Yet Another Maxflow Problem data structures, flows, graphs	2700	x687
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x3517
884F	Anti-Palindromize flows, graphs, greedy	2500	x1279
877F	Ann and Books data structures, flows, hashing	2300	x2331
863F	Almost Permutation flows	2200	x1523
852D	Exploration plan binary search, flows, graph matchings, shortest paths	2100	x1242
848D	Shake It! combinatorics, dp, flows, graphs	2900	x456
847J	Students Initiation binary search, flows, graphs	2400	x778
843E	Maximum Flow flows, graphs	3000	x473
818G	Four Melodies flows, graphs	2600	x1016
813D	Two Melodies dp, flows	2600	x1154
808F	Card Game binary search, flows, graphs	2400	x1584
802M3	April Fools' Problem (hard) binary search, data structures, flows	2900	x1295
802M2	April Fools' Problem (medium) binary search, flows, graphs	2400	x1488
802A3	Heidi and Library (hard) flows, graphs	2600	x700
793G	Oleg and chess data structures, divide and conquer, flows, graph matchings	3400	x452
786E	ALT data structures, flows, graphs, trees	3200	x753
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	3000	x2625
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x205
730I	Olympiad in Programming and Sports dp, flows, graphs, greedy	2000	x2741
727D	T-shirts Distribution constructive algorithms, flows, greedy	1800	x2073
724E	Goods transportation dp, flows, greedy	2900	x1651
723E	One-Way Reform constructive algorithms, dfs and similar, flows, graphs, greedy	2200	x2258
720B	Cactusophobia dfs and similar, flows	2400	x465
717G	Underfail flows	2400	x732
708D	Incorrect Flow flows	2900	x887
704D	Captain America flows, greedy	3100	x1009
653D	Delivery Bears binary search, flows, graphs	2200	x2929
628F	Bear and Fair Set flows, graphs	2500	x964
611H	New Year and Forgotten Tree constructive algorithms, flows, graphs	3200	x700
546E	Soldier and Traveling flows, graphs, math	2100	x4308
513F2	Scaygerboss flows	2800	x412
513F1	Scaygerboss flows	2700	x359
510E	Fox And Dinner flows	2300	x2423
498C	Array and Operations flows, graph matchings, number theory	2100	x4185
491C	Deciphering flows, graph matchings	2300	x519
457E	Flow Optimality constructive algorithms, flows, math	3000	x121
434D	Nanami's Power Plant flows	2900	x518
362E	Petya and Pipes flows, graphs, shortest paths	2300	x895
343E	Pumping Stations brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees	2900	x911
321B	Ciel and Duel dp, flows, greedy	1900	x3832
316C2	Tidying Up flows, graph matchings	2300	x668
316C1	Tidying Up flows	2200	x592
311E	Biologist flows	2300	x1574
280D	k-Maximum Subsequence Sum data structures, flows, graphs, implementation	2800	x1653
277E	Binary Tree on Plane flows, trees	2400	x1479
269C	Flawed Flow constructive algorithms, flows, graphs, greedy	2100	x1818
237E	Build String flows, graphs	2000	x2004
223E	Planar Graph flows, geometry, graphs	3000	x208
212A	Privatization flows, graphs	3000	x228
164C	Machine Programming flows, graphs	2400	x981
132E	Bits of merry old England flows, graphs	2700	x569
126E	Pills brute force, flows	2900	x98
103E	Buying Sets flows, graph matchings	2900	x1067
78E	Evacuation flows, graphs, shortest paths	2300	x693
62E	World Evil dp, flows	2700	x282

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