Problemset - Codeforces

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Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)
2 days
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Before contest
Codeforces Round 1097 (Div. 2, Based on Zhili Cup 2026)
2 days
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Problems

#	Name
747E	Comments dfs and similar, expression parsing, implementation, strings	1700	x2093
747D	Winter Is Coming dp, greedy, sortings	1800	x3459
747C	Servers implementation	1300	x5027
747B	Mammoth's Genome Decoding implementation, strings	900	x9640
747A	Display Size brute force, math	800	x11192
746G	New Roads constructive algorithms, graphs, trees	2100	x1641
746F	Music in Car data structures, greedy, two pointers	2200	x903
746E	Numbers Exchange greedy, implementation, math	1900	x1901
746D	Green and Black Tea constructive algorithms, greedy, math	1500	x5367
746C	Tram constructive algorithms, implementation, math	1600	x3858
746B	Decoding implementation, strings	900	x31881
746A	Compote implementation, math	800	x23840
745B	Hongcow Solves A Puzzle implementation	1400	x3878
745A	Hongcow Learns the Cyclic Shift implementation, strings	900	x10987
744E	Hongcow Masters the Cyclic Shift strings, two pointers	3200	x149
744D	Hongcow Draws a Circle geometry	3200	x135
744C	Hongcow Buys a Deck of Cards bitmasks, brute force, dp	2400	x1304
744B	Hongcow's Game bitmasks, divide and conquer, interactive	1900	x1957
744A	Hongcow Builds A Nation dfs and similar, graphs	1500	x9728
743E	Vladik and cards binary search, bitmasks, brute force, dp	2200	x1629
743D	Chloe and pleasant prizes dfs and similar, dp, graphs, trees	1800	x4728
743C	Vladik and fractions brute force, constructive algorithms, math, number theory	1500	x13400
743B	Chloe and the sequence binary search, bitmasks, constructive algorithms, implementation	1200	x16048
743A	Vladik and flights constructive algorithms, greedy, implementation	1200	x11728
742B	Arpa’s obvious problem and Mehrdad’s terrible solution brute force, math, number theory	1500	x10058
742A	Arpa’s hard exam and Mehrdad’s naive cheat implementation, math, number theory	1000	x51961
741E	Arpa’s abnormal DNA and Mehrdad’s deep interest data structures, string suffix structures	3400	x192
741D	Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths data structures, dfs and similar, trees	2900	x3609
741C	Arpa’s overnight party and Mehrdad’s silent entering constructive algorithms, dfs and similar, graphs	2600	x3118
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x5902
741A	Arpa's loud Owf and Mehrdad's evil plan dfs and similar, math	1600	x5695
740B	Alyona and flowers constructive algorithms	1200	x8871
740A	Alyona and copybooks brute force, implementation	1300	x9168
739E	Gosha is hunting brute force, data structures, dp, flows, math, probabilities, sortings	3000	x2626
739D	Recover a functional graph graph matchings	3400	x215
739C	Alyona and towers data structures	2500	x1709
739B	Alyona and a tree binary search, data structures, dfs and similar, graphs, trees	1900	x5117
739A	Alyona and mex constructive algorithms, greedy	1700	x8453
737F	Dirty plates constructive algorithms, math	3300	x85
737E	Tanya is 5! graph matchings, graphs, greedy, schedules	3300	x138
736E	Chess Championship constructive algorithms, flows, greedy, math	2900	x205
736D	Permutations math, matrices	2800	x544
735E	Ostap and Tree dp, trees	2500	x1002
735D	Taxes math, number theory	1600	x15732
735C	Tennis Championship combinatorics, constructive algorithms, greedy, math	1600	x7965
735B	Urbanization greedy, number theory, sortings	1100	x8743
735A	Ostap and Grasshopper implementation, strings	800	x13141
734F	Anton and School bitmasks, constructive algorithms, implementation, math	2500	x1402
734E	Anton and Tree dfs and similar, dp, trees	2100	x5231
734D	Anton and Chess implementation	1700	x3917
734C	Anton and Making Potions binary search, dp, greedy, two pointers	1600	x5684
734B	Anton and Digits brute force, greedy, implementation, math	800	x31926
734A	Anton and Danik implementation, strings	800	x195407
733F	Drivers Dissatisfaction data structures, dsu, graphs, trees	2200	x1334
733E	Sleep in Class constructive algorithms, data structures, math, two pointers	2400	x1065
733D	Kostya the Sculptor data structures, hashing	1600	x4363
733C	Epidemic in Monstropolis constructive algorithms, dp, greedy, two pointers	1800	x3543
733B	Parade math	1100	x10949
733A	Grasshopper And the String implementation	1000	x16958
732F	Tourist Reform dfs and similar, graphs	2300	x3283
732E	Sockets greedy, sortings	2100	x1667
732D	Exams binary search, greedy, sortings	1700	x5921
732C	Sanatorium binary search, constructive algorithms, greedy, implementation, math	1200	x10169
732B	Cormen --- The Best Friend Of a Man dp, greedy	1000	x25766
732A	Buy a Shovel brute force, constructive algorithms, implementation, math	800	x88799
731F	Video Cards brute force, data structures, implementation, math, number theory	1900	x3143
731E	Funny Game dp, games	2200	x1881
731D	80-th Level Archeology brute force, data structures, greedy, sortings	2200	x1279
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x7857
731B	Coupons and Discounts constructive algorithms, greedy	1100	x8344
731A	Night at the Museum implementation, strings	800	x53183
730L	Expression Queries data structures	3200	x93
730K	Roads Orientation Problem graphs	3200	x157
730J	Bottles dp	1900	x3966
730I	Olympiad in Programming and Sports dp, flows, graphs, greedy	2000	x2743
730H	Delete Them constructive algorithms, implementation	1300	x3274
730G	Car Repair Shop implementation	1600	x2311
730F	Ber Patio	3100	x106
730E	Award Ceremony greedy, implementation	2200	x772
730D	Running Over The Bridges greedy, implementation, math	2200	x915
730C	Bulmart binary search, dfs and similar	2100	x1377
730B	Minimum and Maximum constructive algorithms, interactive	1800	x2779
730A	Toda 2 greedy, implementation	1800	x1733
729F	Financiers Game dp	2500	x1070
729E	Subordinates constructive algorithms, data structures, graphs, greedy, sortings	1900	x2394
729D	Sea Battle constructive algorithms, greedy, math	1700	x4082
729C	Road to Cinema binary search, greedy, sortings	1700	x4181
729B	Spotlights dp, implementation	1200	x8702
729A	Interview with Oleg implementation, strings	900	x8095
727F	Polycarp's problems binary search, dp, greedy	2300	x957
727E	Games on a CD data structures, hashing, string suffix structures, strings	2300	x1552
727D	T-shirts Distribution constructive algorithms, flows, greedy	1800	x2073
727C	Guess the Array constructive algorithms, interactive, math	1400	x8959
727B	Bill Total Value expression parsing, implementation, strings	1600	x2133
727A	Transformation: from A to B brute force, dfs and similar, math	1000	x17998
725G	Messages on a Tree	3300	x180
725F	Family Photos games, greedy	2900	x723
725E	Too Much Money brute force, greedy	2600	x710
725D	Contest Balloons data structures, greedy	1800	x3093
725C	Hidden Word brute force, constructive algorithms, implementation, strings	1600	x2885

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