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
1256B	Minimize the Permutation greedy	1400	x13682
1256A	Payment Without Change math	1000	x32429
1255C	League of Leesins constructive algorithms, implementation	1600	x7221
1255B	Fridge Lockers graphs, implementation	1100	x12522
1255A	Changing Volume math	800	x17984
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x366
1254D	Tree Queries data structures, probabilities, trees	2700	x1528
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x1594
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x3418
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	1800	x5006
1254A	Feeding Chicken constructive algorithms, greedy, implementation	1700	x5515
1253F	Cheap Robot binary search, dsu, graphs, shortest paths, trees	2500	x2250
1253E	Antenna Coverage data structures, dp, greedy, sortings	2200	x3062
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x10241
1253C	Sweets Eating dp, greedy, math, sortings	1500	x15299
1253B	Silly Mistake greedy, implementation	1400	x11704
1253A	Single Push implementation	1000	x19432
1252L	Road Construction flows, graphs	2300	x642
1252K	Addition Robot data structures, math, matrices	2100	x2064
1252J	Tiling Terrace brute force, dp	2300	x783
1252I	Mission Possible	3000	x35
1252H	Twin Buildings greedy, implementation	1800	x2846
1252G	Performance Review data structures	2100	x1553
1252F	Regular Forestation hashing, trees	2400	x1069
1252E	Songwriter greedy, two pointers	2200	x1359
1252D	Find String in a Grid data structures, dp, strings, trees	3000	x412
1252C	Even Path data structures, implementation	1600	x3982
1252B	Cleaning Robots dp, trees	2300	x585
1252A	Copying Homework	1000	x5997
1251F	Red-White Fence combinatorics, fft	2500	x976
1251E2	Voting (Hard Version) binary search, data structures, greedy	2400	x2951
1251E1	Voting (Easy Version) data structures, dp, greedy	2300	x2587
1251D	Salary Changing binary search, greedy, sortings	1900	x6465
1251C	Minimize The Integer greedy, two pointers	1600	x14329
1251B	Binary Palindromes greedy, strings	1400	x11614
1251A	Broken Keyboard brute force, strings, two pointers	1000	x21550
1250N	Wires dfs and similar, graphs, greedy	2000	x1765
1250M	SmartGarden constructive algorithms, divide and conquer	2500	x391
1250L	Divide The Students binary search, greedy, math	1500	x4688
1250K	Projectors flows, graphs	3100	x318
1250J	The Parade binary search, greedy	1800	x3244
1250I	Show Must Go On binary search, brute force, greedy, shortest paths	3100	x171
1250H	Happy Birthday math	1500	x4290
1250G	Discarding Game dp, greedy, two pointers	2300	x775
1250F	Data Center brute force, implementation	800	x8383
1250E	The Coronation graphs, implementation	2300	x907
1250D	Conference Problem dp	3000	x216
1250C	Trip to Saint Petersburg data structures	2100	x1447
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1800	x2799
1250A	Berstagram implementation	1400	x4416
1249F	Maximum Weight Subset dp, trees	2200	x2743
1249E	By Elevator or Stairs? dp, shortest paths	1700	x10985
1249D2	Too Many Segments (hard version) data structures, greedy, sortings	1800	x5771
1249D1	Too Many Segments (easy version) greedy	1800	x5503
1249C2	Good Numbers (hard version) binary search, greedy, math, meet-in-the-middle	1500	x13526
1249C1	Good Numbers (easy version) brute force, greedy, implementation	1300	x16548
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x18385
1249B1	Books Exchange (easy version) dsu, math	1000	x22279
1249A	Yet Another Dividing into Teams math	800	x23697
1248D1	The World Is Just a Programming Task (Easy Version) brute force, dp, greedy, implementation	2000	x2521
1248B	Grow The Tree greedy, math, sortings	900	x18011
1248A	Integer Points geometry, math	1000	x15100
1246F	Cursor Distance	3500	x206
1245F	Daniel and Spring Cleaning bitmasks, brute force, combinatorics, dp	2300	x2263
1245E	Hyakugoku and Ladders dp, probabilities, shortest paths	2300	x1364
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x9591
1245C	Constanze's Machine dp	1400	x19868
1245B	Restricted RPS constructive algorithms, dp, greedy	1200	x14525
1245A	Good ol' Numbers Coloring math, number theory	1000	x14891
1244G	Running in Pairs constructive algorithms, greedy, math	2400	x1529
1244F	Chips constructive algorithms, implementation	2300	x1633
1244E	Minimizing Difference binary search, constructive algorithms, greedy, sortings, ternary search, two pointers	2000	x6399
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1800	x8298
1244C	The Football Season brute force, math, number theory	2000	x8284
1244B	Rooms and Staircases brute force, implementation	1000	x17539
1244A	Pens and Pencils math	800	x20065
1243B2	Character Swap (Hard Version) strings	1600	x7306
1243B1	Character Swap (Easy Version) strings	1000	x15358
1243A	Maximum Square implementation	800	x16376
1242E	Planar Perimeter constructive algorithms, graphs	3200	x155
1242D	Number Discovery math	3400	x234
1242C	Sum Balance bitmasks, dfs and similar, dp, graphs	2400	x1947
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x9239
1242A	Tile Painting constructive algorithms, math, number theory	1500	x13264
1240F	Football graphs	3100	x327
1239F	Swiper, no swiping! graphs, implementation	3400	x316
1239E	Turtle dp, implementation	3100	x1165
1239D	Catowice City 2-sat, dfs and similar, graph matchings, graphs	2400	x2599
1239C	Queue in the Train data structures, greedy, implementation	2300	x1810
1239B	The World Is Just a Programming Task (Hard Version) implementation	2500	x1120
1239A	Ivan the Fool and the Probability Theory combinatorics, dp, math	1700	x7790
1238G	Adilbek and the Watering System data structures, greedy, sortings	2700	x493
1238F	The Maximum Subtree dfs and similar, dp, graphs, trees	2200	x2060
1238E	Keyboard Purchase bitmasks, dp	2200	x3460
1238D	AB-string binary search, combinatorics, dp, strings	1900	x6442
1238C	Standard Free2play dp, greedy, math	1600	x7850
1238B	Kill `Em All greedy, sortings	1300	x14836
1238A	Prime Subtraction math, number theory	900	x28035
1237H	Balanced Reversals constructive algorithms	3300	x437
1237G	Balanced Distribution data structures, dp, greedy	3500	x166

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