Problemset - Codeforces

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Educational Codeforces Round 81 (Rated for Div. 2)
07:42:46
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constructive algorithms

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Problems

#	Name
1292E	Rin and The Unknown Flower constructive algorithms, greedy, interactive, math	3500	x61
1292B	Aroma's Search brute force, constructive algorithms, geometry, greedy, implementation	1800	x3035
1288F	Red-Blue Graph constructive algorithms, flows	2900	x100
1285E	Delete a Segment brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers	2300	x796
1286F	Harry The Potter brute force, constructive algorithms, dp, fft, implementation, math	3200	x48
1286C2	Madhouse (Hard version) brute force, constructive algorithms, hashing, interactive, math	2900	x269
1286C1	Madhouse (Easy version) brute force, constructive algorithms, interactive, math	2400	x660
1286B	Numbers on Tree constructive algorithms, data structures, dfs and similar, graphs, greedy, trees	2000	x2124
1270I	Xor on Figures constructive algorithms, fft, math	3400	x49
1270G	Subset with Zero Sum constructive algorithms, dfs and similar, graphs, math	2700	x619
1270E	Divide Points constructive algorithms, geometry, math	2300	x1283
1270D	Strange Device constructive algorithms, interactive, math, sortings	1900	x2919
1270C	Make Good bitmasks, constructive algorithms, math	1500	x6886
1270B	Interesting Subarray constructive algorithms, greedy, math	1300	x8574
1283F	DIY Garland constructive algorithms, greedy, trees	2400	x625
1283C	Friends and Gifts constructive algorithms, data structures, math	1500	x5446
1282D	Enchanted Artifact constructive algorithms, interactive, strings	2300	x1187
1282E	The Cake Is a Lie constructive algorithms, data structures, dfs and similar, graphs	2400	x557
1268A	Long Beautiful Integer constructive algorithms, greedy, implementation, strings	1700	x4385
1278E	Tests for problem D constructive algorithms, dfs and similar, divide and conquer, trees	2200	x912
1266D	Decreasing Debts constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers	2000	x2133
1266C	Diverse Matrix constructive algorithms, greedy, math, number theory	1400	x5165
1266B	Dice Tower constructive algorithms, math	1000	x7027
1280F	Intergalactic Sliding Puzzle combinatorics, constructive algorithms, math	3400	x26
1276E	Four Stones constructive algorithms	3400	x19
1276C	Beautiful Rectangle brute force, combinatorics, constructive algorithms, data structures, greedy, math	2300	x786
1272B	Snow Walking Robot constructive algorithms, greedy, implementation	1200	x6960
1265A	Beautiful String constructive algorithms, greedy	1000	x8288
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3600	x52
1264E	Beautiful League constructive algorithms, flows, graph matchings	2700	x201
1264B	Beautiful Sequence brute force, constructive algorithms, greedy	1900	x3336
1267L	Lexicography constructive algorithms, strings	1800	x1290
1267I	Intriguing Selection brute force, constructive algorithms, implementation, interactive, sortings	2700	x368
1267H	Help BerLine constructive algorithms	3500	x37
1267D	DevOps Best Practices constructive algorithms	3200	x121
1267C	Cactus Revenge constructive algorithms	3400	x324
1227G	Not Same constructive algorithms	2500	x332
1227C	Messy constructive algorithms	1700	x3188
1227B	Box constructive algorithms	1200	x4844
1254C	Point Ordering constructive algorithms, geometry, interactive, math	2300	x719
1254B2	Send Boxes to Alice (Hard Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2100	x1548
1254B1	Send Boxes to Alice (Easy Version) constructive algorithms, greedy, math, number theory, ternary search, two pointers	2000	x2290
1254A	Feeding Chicken constructive algorithms, greedy, implementation	1900	x2984
1255C	League of Leesins constructive algorithms, implementation	1600	x3658
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x4109
1242E	Planar Perimeter constructive algorithms, graphs	3200	x45
1242A	Tile Painting constructive algorithms, math, number theory	1500	x6835
1256F	Equalizing Two Strings constructive algorithms, sortings, strings	2200	x1531
1245B	Restricted RPS constructive algorithms, dp, greedy	1200	x7425
1250M	SmartGarden constructive algorithms, divide and conquer	2700	x242
1250B	The Feast and the Bus brute force, constructive algorithms, greedy, math	1900	x1471
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3000	x132
1225F	Tree Factory constructive algorithms, greedy, trees	2500	x495
1236C	Labs constructive algorithms, greedy, implementation	1300	x6146
1237H	Balanced Reversals constructive algorithms	3200	x72
1237C2	Balanced Removals (Harder) binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings	1900	x2534
1237C1	Balanced Removals (Easier) constructive algorithms, geometry, greedy	1600	x3882
1244G	Running in Pairs constructive algorithms, greedy, math	2500	x803
1244F	Chips constructive algorithms, implementation	2300	x857
1244E	Minimizing Difference binary search, constructive algorithms, greedy, sortings, ternary search, two pointers	2000	x2578
1244D	Paint the Tree brute force, constructive algorithms, dp, graphs, implementation, trees	1700	x3871
1228F	One Node is Gone constructive algorithms, implementation, trees	2700	x276
1228D	Complete Tripartite brute force, constructive algorithms, graphs, hashing, implementation	1800	x3369
1231E	Middle-Out constructive algorithms, greedy, strings	2000	x334
1221B	Knights constructive algorithms, greedy	1100	x7384
1215C	Swap Letters constructive algorithms, greedy	1500	x5359
1218G	Alpha planetary system constructive algorithms, graphs, shortest paths	3300	x18
1209C	Paint the Digits constructive algorithms, greedy, implementation	1600	x4404
1217D	Coloring Edges constructive algorithms, dfs and similar, graphs	2000	x2739
1214H	Tiles Placement constructive algorithms, dfs and similar, trees	2700	x211
1214E	Petya and Construction Set constructive algorithms, graphs, math, sortings, trees	2000	x1618
1213E	Two Small Strings brute force, constructive algorithms	2000	x2841
1208C	Magic Grid constructive algorithms	1800	x4017
1207B	Square Filling constructive algorithms, greedy, implementation	1200	x8806
1205F	Beauty of a Permutation constructive algorithms, math	3400	x35
1205D	Almost All constructive algorithms, trees	2800	x324
1205A	Almost Equal constructive algorithms, greedy, math	1300	x9006
1202D	Print a 1337-string... combinatorics, constructive algorithms, math, strings	1900	x2741
1198C	Matching vs Independent Set constructive algorithms, graphs, greedy, sortings	2200	x1876
1193C	Scissors and Tape *special problem, constructive algorithms, geometry		x16
1196F	K-th Path brute force, constructive algorithms, shortest paths, sortings	2500	x1202
1196E	Connected Component on a Chessboard constructive algorithms, implementation	1900	x2201
1196B	Odd Sum Segments constructive algorithms, math	1200	x9090
1196A	Three Piles of Candies brute force, constructive algorithms, math	700	x15094
1178E	Archaeology brute force, constructive algorithms, greedy, strings	1900	x2747
1178D	Prime Graph constructive algorithms, greedy, math, number theory	1600	x4211
1188A2	Add on a Tree: Revolution constructive algorithms, dfs and similar, implementation, trees	2500	x736
1187C	Vasya And Array constructive algorithms, greedy, implementation	1800	x3785
1186D	Vus the Cossack and Numbers constructive algorithms, greedy, math	1600	x5487
1179B	Tolik and His Uncle constructive algorithms	1800	x2857
1182D	Complete Mirror constructive algorithms, dfs and similar, dp, hashing, implementation, trees	2500	x502
1173B	Nauuo and Chess constructive algorithms, greedy	1100	x6128
1172D	Nauuo and Portals constructive algorithms	2800	x248
1174F	Ehab and the Big Finale constructive algorithms, divide and conquer, graphs, implementation, interactive, trees	2300	x698
1174D	Ehab and the Expected XOR Problem bitmasks, constructive algorithms	1900	x2844
1174C	Ehab and a Special Coloring Problem constructive algorithms, number theory	1300	x6961
1174A	Ehab Fails to Be Thanos constructive algorithms, greedy, sortings	1000	x9431
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3100	x82
1148F	Foo Fighters bitmasks, constructive algorithms	2500	x484
1148E	Earth Wind and Fire constructive algorithms, greedy, math, sortings, two pointers	2300	x1112

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