Problemset - Codeforces

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Problems

#	Name
1521E	Nastia and a Beautiful Matrix binary search, constructive algorithms, dp, greedy	2700	x676
1521D	Nastia Plays with a Tree constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees	2500	x1937
1521C	Nastia and a Hidden Permutation constructive algorithms, interactive	2000	x4355
1520G	To Go Or Not To Go? brute force, dfs and similar, graphs, greedy, implementation, shortest paths	2200	x3693
1520F2	Guess the K-th Zero (Hard version) binary search, constructive algorithms, data structures, interactive	2200	x3005
1520F1	Guess the K-th Zero (Easy version) binary search, interactive	1600	x11709
1520E	Arranging The Sheep greedy, math	1400	x21357
1519F	Chests and Keys bitmasks, brute force, dfs and similar, dp, flows	3200	x414
1519E	Off by One constructive algorithms, dfs and similar, geometry, graphs, sortings, trees	2700	x819
1519D	Maximum Sum of Products brute force, dp, implementation, math, two pointers	1600	x15210
1519C	Berland Regional brute force, data structures, greedy, number theory, sortings	1400	x16905
1517H	Fly Around the World dp, geometry	3500	x71
1517G	Starry Night Camping constructive algorithms, flows, graphs	3300	x492
1517F	Reunion combinatorics, dp, trees	3200	x459
1517E	Group Photo binary search, data structures, implementation, two pointers	2500	x967
1517D	Explorer Space dp, graphs, shortest paths	1800	x7706
1517C	Fillomino 2 constructive algorithms, dfs and similar, greedy, implementation	1400	x13354
1516E	Baby Ehab Plays with Permutations combinatorics, dp, math	2500	x869
1516D	Cut binary search, data structures, dp, graphs, number theory, two pointers	2100	x4350
1516C	Baby Ehab Partitions Again bitmasks, constructive algorithms, dp, math	1700	x11923
1516B	AGAGA XOOORRR bitmasks, brute force, dp, greedy	1500	x19336
1515I	Phoenix and Diamonds binary search, data structures, sortings	3400	x278
1515H	Phoenix and Bits bitmasks, brute force, data structures, sortings	3500	x233
1515G	Phoenix and Odometers dfs and similar, graphs, math, number theory	2700	x1008
1515F	Phoenix and Earthquake constructive algorithms, dfs and similar, dsu, graphs, greedy, trees	2600	x1777
1515E	Phoenix and Computers combinatorics, dp, math	2200	x3556
1515D	Phoenix and Socks greedy, sortings, two pointers	1500	x11369
1515C	Phoenix and Towers constructive algorithms, data structures, greedy	1400	x17091
1514E	Baby Ehab's Hyper Apartment binary search, graphs, interactive, sortings, two pointers	2700	x615
1514D	Cut and Stick binary search, data structures, greedy, implementation, sortings	2000	x4299
1514C	Product 1 Modulo N greedy, number theory	1600	x15084
1513F	Swapping Problem brute force, constructive algorithms, data structures, sortings	2500	x1265
1513E	Cost Equilibrium combinatorics, constructive algorithms, math, sortings	2300	x1504
1513D	GCD and MST constructive algorithms, dsu, graphs, greedy, number theory, sortings	2000	x5387
1513C	Add One dp, matrices	1600	x13984
1513B	AND Sequences bitmasks, combinatorics, constructive algorithms, math	1400	x14672
1512G	Short Task brute force, dp, math, number theory	1700	x8123
1512F	Education brute force, dp, greedy, implementation	1900	x6205
1512E	Permutation by Sum brute force, greedy, math	1600	x10466
1511G	Chips on a Board bitmasks, brute force, data structures, dp, games, two pointers	2700	x783
1511F	Chainword brute force, data structures, dp, matrices, string suffix structures, strings	2700	x441
1511E	Colorings and Dominoes combinatorics, dp, greedy, math	2100	x2592
1511D	Min Cost String brute force, constructive algorithms, graphs, greedy, strings	1600	x11488
1510J	Japanese Game constructive algorithms, math	2700	x522
1510I	Is It Rated? greedy, interactive, math, probabilities	2700	x482
1510H	Hard Optimization dp	3200	x98
1510G	Guide	2100	x1280
1510F	Fiber Shape	2800	x58
1510E	Equilibrium Point /\textbackslash/\textbackslash	2700	x254
1510D	Digits dp, math, number theory	2100	x1901
1510C	Cactus Not Enough dfs and similar, graph matchings, graphs	2900	x215
1510B	Button Lock flows, graph matchings, graphs	2600	x746
1510A	ASCII Automata Art	3100	x154
1509C	The Sports Festival dp, greedy	1800	x12529
1508F	Optimal Encoding brute force, data structures	3500	x125
1508E	Tree Calendar brute force, constructive algorithms, data structures, dfs and similar, sortings, trees	3100	x346
1508D	Swap Pass constructive algorithms, geometry, sortings	3000	x570
1508C	Complete the MST bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees	2500	x1493
1508B	Almost Sorted binary search, combinatorics, constructive algorithms, implementation	1800	x3993
1508A	Binary Literature constructive algorithms, greedy, implementation, strings, two pointers	1900	x6223
1506G	Maximize the Remaining String brute force, data structures, dp, greedy, strings	2000	x4311
1506F	Triangular Paths constructive algorithms, graphs, math, shortest paths, sortings	2000	x3276
1506E	Restoring the Permutation constructive algorithms, implementation	1500	x13076
1506D	Epic Transformation constructive algorithms, data structures, greedy	1400	x21712
1505I	Mysterious language again, seriously? *special problem	2200	x555
1505H	L BREAK into program *special problem	2500	x508
1505G	Encoded message *special problem, implementation	2600	x306
1505F	Math *special problem, math	2200	x1503
1505E	Cakewalk *special problem, greedy, implementation, shortest paths	1800	x1800
1505D	Xenolith? Hippodrome? *special problem, number theory	1800	x795
1505C	Fibonacci Words *special problem, implementation	1400	x6430
1505B	DMCA *special problem, implementation, number theory	1600	x6156
1503F	Balance the Cards constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation	3500	x183
1503E	2-Coloring combinatorics, dp, math	3100	x693
1503D	Flip the Cards 2-sat, constructive algorithms, data structures, greedy, sortings, two pointers	2600	x1084
1503C	Travelling Salesman Problem binary search, data structures, dp, greedy, shortest paths, sortings, two pointers	2200	x3425
1503B	3-Coloring constructive algorithms, games, interactive	1700	x7034
1503A	Balance the Bits constructive algorithms, greedy	1600	x13392
1500F	Cupboards Jumps dp	3500	x349
1500E	Subset Trick binary search, data structures	3300	x216
1500D	Tiles for Bathroom data structures, sortings, two pointers	2900	x458
1500C	Matrix Sorting bitmasks, brute force, constructive algorithms, greedy, two pointers	2600	x807
1500B	Two chandeliers binary search, brute force, chinese remainder theorem, math, number theory	2200	x2043
1500A	Going Home brute force, hashing, implementation, math	1800	x8817
1499G	Graph Coloring data structures, graphs, interactive	3100	x190
1499F	Diameter Cuts combinatorics, dfs and similar, dp, trees	2400	x1333
1499E	Chaotic Merge combinatorics, dp, math, strings	2400	x1503
1499D	The Number of Pairs dp, math, number theory	2100	x5828
1499C	Minimum Grid Path brute force, data structures, greedy, math	1500	x12636
1498F	Christmas Game bitmasks, data structures, dfs and similar, dp, games, math, trees	2500	x918
1498E	Two Houses brute force, graphs, greedy, interactive, sortings	2200	x1924
1498D	Bananas in a Microwave dfs and similar, dp, graphs, implementation	2200	x2319
1498C	Planar Reflections brute force, data structures, dp	1600	x9691
1497E2	Square-Free Division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1674
1497E1	Square-Free Division (easy version) data structures, dp, greedy, math, number theory, two pointers	1700	x8304
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1524
1497C2	k-LCM (hard version) constructive algorithms, math	1600	x17232
1495F	Squares constructive algorithms, data structures, dp, graphs, trees	3300	x294
1495E	Qingshan and Daniel brute force, data structures, greedy, implementation	3200	x415
1495D	BFS Trees combinatorics, dfs and similar, graphs, math, shortest paths, trees	2600	x1316