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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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games

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Problems

#	Name
2218A	The 67th Integer Problem brute force, games, implementation, math	800	x34431
2217F	Interval Game bitmasks, combinatorics, constructive algorithms, dp, games, games, greedy, greedy, math, probabilities	2300	x682
2215F	Research games	3500	x42
2214J	Special Problem *special problem, brute force, games, interactive		x3534
2208B	Cyclists brute force, games, greedy, implementation, math, sortings	1100	x13583
2207D	Boxed Like a Fish dfs and similar, dp, games, shortest paths, trees	2200	x2102
2207B	One Night At Freddy's games, greedy, sortings	1600	x5759
2206B	Subtree Removal Game binary search, games, trees	2500	x343
2203E	Probabilistic Card Game binary search, data structures, games, greedy, math, ternary search	2200	x1409
2203D	Divisibility Game brute force, games, games, games, greedy, number theory, number theory	1700	x5399
2200E	Divisive Battle games, greedy, math, number theory	1500	x8004
2196A	Game with a Fraction games, math	1200	x15762
2190B2	Sub-RBS (Hard Version) dp, games, implementation, strings	1900	x3176
2190A	Sorting Game constructive algorithms, games, greedy	1200	x17090
2187C	Jerry and Tom data structures, dfs and similar, dsu, games, graphs, greedy, trees	2300	x1364
2183A	Binary Array Game games	800	x23646
2181F	Fragmented Nim games	1600	x3509
2181B	Battle of Arrays data structures, games, greedy	1400	x5647
2180H2	Bug Is Feature (Conditional Version) games	3500	x105
2180H1	Bug Is Feature (Unconditional Version) games	3400	x120
2171C2	Renako Amaori and XOR Game (hard version) bitmasks, games, greedy	1400	x11820
2171C1	Renako Amaori and XOR Game (easy version) bitmasks, games, greedy	1100	x19209
2161A	Round Trip games, greedy, implementation, math	800	x15704
2158C	Annoying Game dp, games, greedy	1400	x11030
2157I	Hyper Smawk Bros dp, dp, games	3500	x171
2156E	Best Time to Buy and Sell Stock binary search, brute force, data structures, dp, games, graphs, greedy	2500	x959
2155E	Mimo & Yuyu games, greedy, math	2200	x2832
2152D	Division Versus Addition games, greedy, math	1700	x6743
2152B	Catching the Krug games	1300	x12840
2147D	Game on Array games, greedy	1700	x7472
2140C	Ultimate Value data structures, games, greedy	1500	x12359
2137G	Cry Me a River dfs and similar, dp, games, graphs	2200	x1930
2127C	Trip Shopping games, greedy, sortings	1400	x12366
2127B	Hamiiid, Haaamid... Hamid? games, greedy	1300	x13484
2123D	Binary String Battle constructive algorithms, games, greedy	1200	x21868
2116A	Gellyfish and Tricolor Pansy games, greedy	800	x26957
2115D	Gellyfish and Forget-Me-Not bitmasks, dp, games, greedy, math	2900	x1100
2107B	Apples in Boxes games, greedy, math	1100	x19789
2104C	Card Game brute force, constructive algorithms, games, greedy, math	1100	x17373
2095B	Plinko *special problem, games, interactive		x5992
2089C1	Key of Like (Easy Version) dp, games, math, probabilities	2200	x1458
2084G1	Wish Upon a Satellite (Easy Version) dp, games	2600	x755
2079A	Alice, Bob, And Two Arrays *special problem, data structures, dp, games	3300	x37
2070E	Game with Binary String constructive algorithms, data structures, divide and conquer, games, greedy, math	2200	x1853
2062E2	The Game (Hard Version) data structures, dfs and similar, games, graphs, implementation, trees	3000	x450
2062E1	The Game (Easy Version) data structures, dfs and similar, games, graphs, greedy, trees	2000	x4322
2060C	Game of Mathletes games, greedy, sortings, two pointers	900	x32056
2055A	Two Frogs constructive algorithms, games, greedy, math	800	x33632
2053E	Resourceful Caterpillar Sequence dfs and similar, dp, games, graphs, greedy, trees	1900	x4513
2045F	Grid Game 3-angle games, math	3000	x154
2043F	Nim bitmasks, brute force, combinatorics, dp, games, greedy, implementation, shortest paths	2700	x905
2042B	Game with Colored Marbles games, greedy	900	x19479
2040A	Game of Division games, math	800	x24426
2038A	Bonus Project games, greedy	1400	x5430
2032F	Peanuts combinatorics, dp, games, math	2700	x486
2030C	A TRUE Battle brute force, games, greedy	1100	x19804
2030B	Minimise Oneness combinatorics, constructive algorithms, games, math	800	x23678
2029B	Replacement constructive algorithms, games, strings	1100	x11724
2028E	Alice's Adventures in the Rabbit Hole combinatorics, dfs and similar, dp, games, greedy, math, probabilities, trees	2300	x1905
2027E1	Bit Game (Easy Version) bitmasks, brute force, games, math	2800	x248
2013F1	Game in Tree (Easy Version) binary search, brute force, data structures, dp, games, greedy, implementation, trees	2700	x651
2006A	Iris and Game on the Tree constructive algorithms, dfs and similar, games, graphs, greedy, trees	1700	x9352
2005E2	Subtangle Game (Hard Version) data structures, dp, games, greedy, implementation	2500	x1064
2005E1	Subtangle Game (Easy Version) dp, games, greedy, implementation	2100	x3322
2004E	Not a Nim Problem brute force, games, math, number theory	2100	x5065
2004C	Splitting Items games, greedy, sortings	1100	x27123
2003B	Turtle and Piggy Are Playing a Game 2 games, greedy, sortings	800	x27521
2002B	Removals Game constructive algorithms, games	1000	x22987
1994H	Fortnite combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings	3500	x774
1991I	Grid Game constructive algorithms, games, graph matchings, greedy, interactive	3500	x171
1991H	Prime Split Game bitmasks, dp, fft, games, math, number theory	3300	x559
1991E	Coloring Game constructive algorithms, dfs and similar, games, graphs, greedy, interactive	1900	x5117
1990A	Submission Bait brute force, games, greedy, sortings	900	x26852
1987D	World is Mine dp, games	1800	x8693
1972B	Coin Games games	900	x25371
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x2440
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x4332
1970C1	Game on Tree (Easy) games	1400	x5029
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x17419
1966A	Card Exchange constructive algorithms, games, greedy	800	x19566
1965E	Connected Cubes constructive algorithms, games	3100	x465
1965A	Everything Nim games, greedy, math, sortings	1400	x16697
1956B	Nene and the Card Game games, greedy	800	x22926
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x24185
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x8711
1952E	Sweep Line *special problem, combinatorics, games, math		x341
1951H	Thanos Snap binary search, dp, games, greedy, trees	3200	x358
1943A	MEX Game 1 games, greedy	1300	x21466
1942E	Farm Game combinatorics, games	2300	x1957
1939D	Big Persimmon *special problem, dp, games		x110
1934D2	XOR Break --- Game Version bitmasks, games, greedy, interactive	2400	x1759
1931E	Anna and the Valentine's Day Gift games, greedy, math, sortings	1400	x25688
1929C	Sasha and the Casino binary search, brute force, constructive algorithms, games, greedy, math	1400	x17279
1921E	Eat the Chip brute force, games, greedy, math	1600	x11400
1920B	Summation Game games, greedy, math, sortings	1100	x23119
1919G	Tree LGM constructive algorithms, divide and conquer, games, trees	3500	x208
1919A	Wallet Exchange games, math	800	x36182
1916C	Training Before the Olympiad constructive algorithms, games, greedy, implementation, math	1200	x19872
1914E2	Game with Marbles (Hard Version) games, greedy, sortings	1400	x14740
1914E1	Game with Marbles (Easy Version) brute force, games, greedy, sortings	1400	x14233

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