Problemset - Codeforces

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Educational Codeforces Round 170 (Rated for Div. 2)
13 days

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Problems

#	Name
2002C	Black Circles brute force, geometry, greedy, math	1200	x14303
2002B	Removals Game constructive algorithms, games	1000	x17656
2002A	Distanced Coloring constructive algorithms, implementation, math	800	x18771
2001E2	Deterministic Heap (Hard Version) combinatorics, dp, trees	2900	x189
2001E1	Deterministic Heap (Easy Version) combinatorics, dp, math, trees	2400	x1168
2001D	Longest Max Min Subsequence brute force, constructive algorithms, data structures, greedy, implementation	1900	x4734
2001C	Guess The Tree binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees	1500	x10200
2001B	Generate Permutation constructive algorithms	800	x23355
2001A	Make All Equal greedy, implementation	800	x28556
2000H	Ksyusha and the Loaded Set binary search, brute force, data structures, implementation	2200	x1525
2000G	Call During the Journey binary search, brute force, graphs, greedy, shortest paths	2100	x2104
2000F	Color Rows and Columns dp, greedy, implementation, math	1900	x5069
2000E	Photoshoot for Gorillas combinatorics, data structures, greedy, math	1400	x12552
2000D	Right Left Wrong greedy, implementation, two pointers	1200	x21690
2000C	Numeric String Template data structures, strings	1000	x24173
2000B	Seating in a Bus two pointers	800	x32444
2000A	Primary Task implementation, math, strings	800	x35582
1999G2	Ruler (hard version) binary search, interactive, ternary search	1700	x7439
1999G1	Ruler (easy version) binary search, interactive	1500	x9588
1999F	Expected Median combinatorics, math	1500	x9732
1999E	Triple Operations dp, implementation, math	1300	x17539
1999D	Slavic's Exam greedy, implementation, strings	1100	x25611
1999C	Showering greedy, implementation	800	x33653
1999B	Card Game brute force, constructive algorithms, implementation	1000	x30551
1999A	A+B Again? implementation, math	800	x48897
1998E2	Eliminating Balls With Merging (Hard Version) binary search, brute force, data structures, divide and conquer, greedy, implementation	2500	x643
1998E1	Eliminating Balls With Merging (Easy Version) binary search, brute force, data structures, divide and conquer, greedy	2200	x1725
1998D	Determine Winning Islands in Race data structures, dp, graphs, greedy, shortest paths	2100	x3097
1998C	Perform Operations to Maximize Score binary search, brute force, constructive algorithms, greedy, implementation	1900	x5837
1998B	Minimize Equal Sum Subarrays constructive algorithms, math, number theory	1000	x22723
1998A	Find K Distinct Points with Fixed Center constructive algorithms, implementation, math	800	x23287
1997F	Chips on a Line brute force, combinatorics, dp, greedy, math	2700	x849
1997E	Level Up binary search, brute force, data structures, divide and conquer, implementation	2200	x2953
1997D	Maximize the Root binary search, dfs and similar, dp, greedy, trees	1500	x11862
1997C	Even Positions constructive algorithms, data structures, greedy	1100	x21094
1997B	Make Three Regions constructive algorithms, two pointers	1100	x19898
1997A	Strong Password brute force, implementation, strings	800	x27734
1996G	Penacony brute force, data structures, graphs, greedy, hashing	2200	x1557
1996F	Bomb binary search, greedy, math	1900	x4454
1996E	Decode combinatorics, data structures, implementation, math	1600	x9098
1996D	Fun binary search, brute force, combinatorics, math, number theory	1500	x15198
1996C	Sort dp, greedy, sortings, strings	1200	x21911
1996B	Scale greedy, implementation	800	x31621
1996A	Legs binary search, math, ternary search	800	x40475
1995E2	Let Me Teach You a Lesson (Hard Version) data structures, dp, matrices, two pointers	2900	x287
1995E1	Let Me Teach You a Lesson (Easy Version) 2-sat, data structures, dp, matrices, two pointers	2700	x360
1995D	Cases bitmasks, brute force, dp, strings	2300	x2246
1995C	Squaring brute force, constructive algorithms, greedy, implementation, math, number theory	1800	x8217
1995B2	Bouquet (Hard Version) binary search, data structures, greedy, math, sortings, two pointers	1700	x8398
1995B1	Bouquet (Easy Version) binary search, brute force, greedy, sortings, two pointers	1100	x17246
1995A	Diagonals brute force, greedy, implementation, math	800	x23642
1994H	Fortnite combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings	3500	x689
1994G	Minecraft bitmasks, brute force, dp, graphs, math	2600	x1175
1994F	Stardew Valley constructive algorithms, dfs and similar, graphs, trees	2500	x1119
1994E	Wooden Game bitmasks, greedy, math, trees	2000	x4290
1994D	Funny Game constructive algorithms, dsu, graphs, greedy, math, number theory, trees	1900	x5513
1994C	Hungry Games binary search, dp, two pointers	1600	x10241
1994B	Fun Game bitmasks, constructive algorithms, greedy, math	1100	x16041
1994A	Diverse Game constructive algorithms, greedy, implementation	800	x19769
1993F2	Dyn-scripted Robot (Hard Version) chinese remainder theorem, math, number theory	2800	x376
1993F1	Dyn-scripted Robot (Easy Version) brute force, chinese remainder theorem, constructive algorithms, math, number theory	2400	x940
1993E	Xor-Grid Problem bitmasks, constructive algorithms, dp, implementation	2700	x482
1993D	Med-imize binary search, dp, greedy	2200	x3559
1993C	Light Switches implementation, math	1400	x13043
1993B	Parity and Sum constructive algorithms, greedy	1100	x21928
1993A	Question Marks greedy, implementation	800	x28463
1992G	Ultra-Meow combinatorics, dp, math	2000	x2958
1992F	Valuable Cards brute force, dp, greedy, number theory, two pointers	1900	x5526
1992E	Novice's Mistake brute force, constructive algorithms, implementation, math, strings	1700	x8821
1992D	Test of Love dp, greedy, implementation	1200	x19783
1992C	Gorilla and Permutation constructive algorithms, math	900	x28195
1992B	Angry Monk greedy, math, sortings	800	x33195
1992A	Only Pluses brute force, constructive algorithms, greedy, math, sortings	800	x39697
1991I	Grid Game constructive algorithms, games, graph matchings, greedy, interactive	3500	x66
1991H	Prime Split Game bitmasks, dp, fft, games, math, number theory	3300	x418
1991G	Grid Reset constructive algorithms, greedy, implementation	2700	x532
1991F	Triangle Formation brute force, greedy, implementation, math, sortings	2200	x2178
1991E	Coloring Game constructive algorithms, dfs and similar, games, graphs, greedy, interactive	1900	x4011
1991D	Prime XOR Coloring bitmasks, constructive algorithms, graphs, greedy, math, number theory	1900	x6353
1991C	Absolute Zero constructive algorithms, greedy, math	1300	x13832
1991B	AND Reconstruction bitmasks, constructive algorithms, greedy	1100	x15783
1991A	Maximize the Last Element greedy, implementation	800	x21160
1990F	Polygonal Segments brute force, data structures, divide and conquer, dp, greedy, two pointers	2800	x264
1990E2	Catch the Mole(Hard Version) binary search, data structures, dfs and similar, divide and conquer, interactive, trees	2600	x826
1990E1	Catch the Mole(Easy Version) binary search, data structures, dfs and similar, interactive, trees	2500	x891
1990D	Grid Puzzle bitmasks, brute force, dp, greedy, implementation	1800	x6017
1990C	Mad MAD Sum brute force, greedy, math	1500	x11049
1990B	Array Craft constructive algorithms, greedy	1200	x15880
1990A	Submission Bait brute force, games, greedy, sortings	900	x21657
1989F	Simultaneous Coloring dfs and similar, divide and conquer, graphs	3000	x437
1989E	Distance to Different combinatorics, dp, math	2300	x1883
1989D	Smithing Skill brute force, data structures, dp, greedy, math, sortings, two pointers	1900	x5742
1989C	Two Movies greedy, math	1400	x17853
1989B	Substring and Subsequence brute force, greedy, strings	1200	x19553
1989A	Catch the Coin implementation	800	x25761
1988F	Heartbeat combinatorics, dp, fft, math	3000	x183
1988E	Range Minimum Sum binary search, brute force, data structures, divide and conquer, implementation	2300	x1352
1988D	The Omnipotent Monster Killer brute force, dfs and similar, dp, trees	2000	x4723
1988C	Increasing Sequence with Fixed OR bitmasks, constructive algorithms, greedy	1300	x15941
1988B	Make Majority greedy, implementation	900	x21849