Problemset - Codeforces

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Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
03:39:10
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Problems

#	Name
1972B	Coin Games games	900	x21165
1972A	Contest Proposal brute force, greedy, two pointers	800	x22683
1971H	±1 2-sat, dfs and similar, graphs	2100	x1763
1971G	XOUR data structures, dsu, sortings	1700	x8981
1971F	Circle Perimeter binary search, brute force, dfs and similar, geometry, implementation, math	1600	x9715
1971E	Find the Car binary search, math, sortings	1500	x13903
1971D	Binary Cut dp, greedy, implementation, sortings, strings	1100	x25448
1971C	Clock and Strings implementation	900	x32164
1971B	Different String implementation, strings	800	x36079
1971A	My First Sorting Problem implementation, sortings	800	x43932
1970G3	Min-Fund Prison (Hard) bitmasks, dfs and similar, dp, graphs, trees	2400	x322
1970G2	Min-Fund Prison (Medium) brute force, dfs and similar, dp, graphs, trees	2200	x558
1970G1	Min-Fund Prison (Easy) dfs and similar, trees	1900	x1293
1970F3	Playing Quidditch (Hard) implementation	2300	x339
1970F2	Playing Quidditch (Medium) implementation	2300	x329
1970F1	Playing Quidditch (Easy) implementation	2300	x409
1970E3	Trails (Hard) dp, matrices	2200	x706
1970E2	Trails (Medium) dp, matrices	2000	x1213
1970E1	Trails (Easy) dp	1800	x2060
1970D3	Arithmancy (Hard) interactive	3100	x106
1970D2	Arithmancy (Medium) constructive algorithms, interactive, probabilities, strings	2600	x199
1970D1	Arithmancy (Easy) brute force, constructive algorithms, interactive, strings	2100	x583
1970C3	Game on Tree (Hard) dfs and similar, dp, games, trees	1900	x1475
1970C2	Game on Tree (Medium) dfs and similar, dp, games, trees	1700	x2568
1970C1	Game on Tree (Easy) games	1400	x3288
1970B3	Exact Neighbours (Hard) constructive algorithms	2300	x460
1970B2	Exact Neighbours (Medium) constructive algorithms	2100	x764
1970B1	Exact Neighbours (Easy) constructive algorithms	1900	x1086
1970A3	Balanced Unshuffle (Hard) constructive algorithms, trees	2400	x440
1970A2	Balanced Unshuffle (Medium) brute force, constructive algorithms, trees	2400	x425
1970A1	Balanced Shuffle (Easy) implementation, sortings	1000	x4391
1969F	Card Pairing dp, greedy, hashing, implementation	3000	x265
1969E	Unique Array binary search, data structures, divide and conquer, dp, greedy	2400	x1340
1969D	Shop Game data structures, greedy, math, sortings	1900	x4449
1969C	Minimizing the Sum dp, implementation	1700	x8512
1969B	Shifts and Sorting constructive algorithms, greedy	1000	x18620
1969A	Two Friends constructive algorithms, implementation, math	800	x19694
1968G2	Division + LCP (hard version) binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings	2200	x1918
1968G1	Division + LCP (easy version) binary search, data structures, dp, hashing, string suffix structures, strings	1900	x4166
1968F	Equal XOR Segments binary search, data structures	1800	x5361
1968E	Cells Arrangement constructive algorithms	1600	x10200
1968D	Permutation Game brute force, dfs and similar, games, graphs, greedy, math	1300	x14652
1968C	Assembly via Remainders constructive algorithms, number theory	1000	x24482
1968B	Prefiquence greedy, two pointers	800	x27553
1968A	Maximize? brute force, math, number theory	800	x33638
1967F	Next and Prev brute force, data structures, implementation	3200	x64
1967E2	Again Counting Arrays (Hard Version) combinatorics, dp, math	3500	x101
1967E1	Again Counting Arrays (Easy Version) combinatorics, dp, fft, math	3100	x211
1967D	Long Way to be Non-decreasing binary search, dfs and similar, graphs, implementation, shortest paths, two pointers	2800	x638
1967C	Fenwick Tree bitmasks, brute force, combinatorics, data structures, dp, math, trees	2300	x1713
1967B2	Reverse Card (Hard Version) brute force, math, number theory	2200	x3872
1967B1	Reverse Card (Easy Version) brute force, math, number theory	1400	x13045
1967A	Permutation Counting binary search, greedy, implementation, math, sortings	1400	x12253
1966B	Rectangle Filling constructive algorithms, implementation	1100	x14762
1966A	Card Exchange constructive algorithms, games, greedy	800	x17635
1965F	Conference data structures, flows	3300	x167
1965E	Connected Cubes constructive algorithms, games	3100	x251
1965D	Missing Subarray Sum constructive algorithms	2900	x407
1965C	Folding Strip constructive algorithms, greedy, strings	2300	x1885
1965B	Missing Subsequence Sum bitmasks, constructive algorithms, greedy, number theory	1800	x6570
1965A	Everything Nim games, greedy, math, sortings	1400	x13446
1958J	Necromancer *special problem	3200	x31
1958I	Equal Trees *special problem, graphs, meet-in-the-middle	3100	x31
1958H	Composite Spells *special problem, dp	2600	x75
1958G	Observation Towers *special problem	2400	x107
1958F	Narrow Paths *special problem, combinatorics	2000	x189
1958E	Yet Another Permutation Constructive *special problem, constructive algorithms	1900	x250
1958D	Staircase *special problem	1600	x500
1958C	Firewood *special problem	1500	x693
1958B	Clock in the Pool *special problem, math	1400	x872
1958A	1-3-5 *special problem, dp	1100	x1892
1957F2	Frequency Mismatch (Hard Version) binary search, data structures, dfs and similar, hashing, probabilities, trees	2700	x430
1957F1	Frequency Mismatch (Easy Version) binary search, data structures, divide and conquer, hashing, probabilities, trees	2600	x477
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x1245
1957D	A BIT of an Inequality bitmasks, brute force, dp, math	1900	x4412
1957C	How Does the Rook Move? combinatorics, dp, math	1600	x9476
1957B	A BIT of a Construction bitmasks, constructive algorithms, greedy, implementation	1100	x17700
1957A	Stickogon constructive algorithms, greedy	800	x23026
1956F	Nene and the Passing Game constructive algorithms, data structures, dsu, graphs, sortings	3000	x346
1956E2	Nene vs. Monsters (Hard Version) brute force, greedy, implementation, math	2700	x827
1956E1	Nene vs. Monsters (Easy Version) brute force, implementation, math	2500	x1419
1956D	Nene and the Mex Operator bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math	2000	x3850
1956C	Nene's Magical Matrix constructive algorithms, greedy, math	1600	x12720
1956B	Nene and the Card Game games, greedy	800	x21066
1956A	Nene's Game binary search, brute force, data structures, games, greedy	800	x21382
1955H	The Most Reckless Defense bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths	2300	x1233
1955G	GCD on a grid brute force, dfs and similar, dp, implementation, math, number theory	1900	x4436
1955F	Unfair Game dp, games, greedy, math, schedules	1800	x6964
1955E	Long Inversions brute force, greedy, implementation, sortings	1700	x8466
1955D	Inaccurate Subsequence Search data structures, two pointers	1400	x15111
1955C	Inhabitant of the Deep Sea greedy, implementation, math	1300	x20896
1955B	Progressive Square constructive algorithms, data structures, implementation, sortings	1000	x27383
1955A	Yogurt Sale math	800	x42494
1954F	Unique Strings combinatorics, dp, math	3100	x248
1954E	Chain Reaction binary search, data structures, dsu, greedy, implementation, math, number theory	2200	x2206
1954D	Colored Balls combinatorics, dp, math, sortings	1800	x6009
1954C	Long Multiplication greedy, math, number theory	1200	x19121
1954B	Make It Ugly implementation, math	1200	x18302
1954A	Painting the Ribbon constructive algorithms, greedy, math	900	x23796
1951I	Growing Trees binary search, constructive algorithms, flows, graphs, greedy	3200	x75