Problemset - Codeforces

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number theory

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Problems

#	Name
711E	ZS and The Birthday Paradox math, number theory, probabilities	2300	x1241
1797E	Li Hua and Array brute force, data structures, dsu, math, number theory, two pointers	2300	x1194
772C	Vulnerable Kerbals constructive algorithms, dp, graphs, math, number theory	2300	x1186
830C	Bamboo Partition brute force, data structures, implementation, math, number theory, sortings, two pointers	2300	x1185
915G	Coprime Arrays math, number theory	2300	x1131
300E	Empire Strikes Back binary search, math, number theory	2300	x1026
1200F	Graph Traveler brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory	2300	x1001
768F	Barrels and boxes brute force, combinatorics, math, number theory, probabilities	2300	x998
659G	Fence Divercity combinatorics, dp, number theory	2300	x947
1932G	Moving Platforms graphs, math, number theory, shortest paths	2300	x881
364C	Beautiful Set brute force, number theory	2300	x582
180B	Divisibility Rules math, number theory	2300	x327
774E	Big Number and Remainder *special problem, math, number theory	2300	x206
1346G	Two IP Cameras *special problem, math, number theory	2300	x131
446C	DZY Loves Fibonacci Numbers data structures, math, number theory	2400	x3180
1491E	Fib-tree brute force, dfs and similar, divide and conquer, number theory, trees	2400	x2043
1114F	Please, another Queries on Array? bitmasks, data structures, divide and conquer, math, number theory	2400	x1812
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x1730
1706D2	Chopping Carrots (Hard Version) brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers	2400	x1653
1830C	Hyperregular Bracket Strings combinatorics, greedy, hashing, math, number theory, sortings	2400	x1528
1718C	Tonya and Burenka-179 data structures, greedy, math, number theory	2400	x1520
1630D	Flipping Range constructive algorithms, dp, greedy, number theory	2400	x1509
912E	Prime Gift binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers	2400	x1487
1137D	Cooperative Game constructive algorithms, interactive, number theory	2400	x1472
1036E	Covered Points fft, geometry, number theory	2400	x1414
1732D2	Balance (Hard version) brute force, data structures, number theory	2400	x1365
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1362
1608D	Dominoes combinatorics, fft, graphs, math, number theory	2400	x1348
1792E	Divisors and Table brute force, dfs and similar, dp, number theory	2400	x1305
1780E	Josuke and Complete Graph binary search, brute force, data structures, math, number theory	2400	x1305
1909E	Multiple Lamps bitmasks, brute force, constructive algorithms, math, number theory	2400	x1248
498D	Traffic Jams in the Land data structures, dp, number theory	2400	x1062
17D	Notepad number theory	2400	x1038
1605E	Array Equalizer binary search, greedy, implementation, math, number theory, sortings, two pointers	2400	x997
1957E	Carousel of Combinations brute force, combinatorics, dp, math, number theory	2400	x989
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x968
585C	Alice, Bob, Oranges and Apples number theory	2400	x961
1882E1	Two Permutations (Easy Version) brute force, constructive algorithms, greedy, number theory	2400	x958
1106F	Lunar New Year and a Recursive Sequence math, matrices, number theory	2400	x949
1007B	Pave the Parallelepiped bitmasks, brute force, combinatorics, math, number theory	2400	x938
303C	Minimum Modular brute force, graphs, math, number theory	2400	x854
226C	Anniversary data structures, implementation, math, matrices, number theory	2400	x844
83D	Numbers dp, math, number theory	2400	x821
582C	Superior Periodic Subarrays number theory	2400	x725
1780G	Delicious Dessert binary search, dsu, hashing, math, number theory, string suffix structures	2400	x671
758F	Geometrical Progression brute force, math, number theory	2400	x620
922F	Divisibility constructive algorithms, dp, greedy, number theory	2400	x616
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x576
293C	Cube Problem brute force, math, number theory	2400	x552
283D	Cows and Cool Sequences dp, math, number theory	2400	x522
1045B	Space Isaac hashing, number theory	2400	x491
200E	Tractor College implementation, math, number theory, ternary search	2400	x333
73E	Morrowindows math, number theory	2400	x322
55D	Beautiful numbers dp, number theory	2500	x3606
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x2361
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x2196
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2187
1497E2	Square-free division (hard version) data structures, dp, greedy, math, number theory, two pointers	2500	x1566
594D	REQ data structures, number theory	2500	x1513
1497D	Genius bitmasks, dp, graphs, number theory	2500	x1483
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x1351
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x1267
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x1265
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x1213
1712E2	LCM Sum (hard version) brute force, data structures, math, number theory, two pointers	2500	x1183
710D	Two Arithmetic Progressions math, number theory	2500	x1158
792E	Colored Balls greedy, math, number theory	2500	x1040
1658E	Gojou and Matrix Game data structures, dp, games, hashing, implementation, math, number theory, sortings	2500	x1020
1716F	Bags with Balls combinatorics, dp, math, number theory	2500	x1000
1789E	Serval and Music Game brute force, dp, implementation, math, number theory	2500	x762
645F	Cowslip Collections combinatorics, math, number theory	2500	x757
1673E	Power or XOR? bitmasks, combinatorics, math, number theory	2500	x660
1798F	Gifts from Grandfather Ahmed dp, math, number theory	2500	x467
1725E	Electrical Efficiency combinatorics, data structures, dp, math, number theory, trees	2500	x432
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x299
1488G	Painting Numbers *special problem, data structures, greedy, number theory	2500	x117
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2600	x1851
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x1739
1406E	Deleting Numbers interactive, math, number theory	2600	x1552
1554E	You dfs and similar, dp, math, number theory	2600	x1180
1699E	Three Days Grace data structures, dp, greedy, math, number theory, two pointers	2600	x1086
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x996
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x811
1398G	Running Competition bitmasks, fft, math, number theory	2600	x773
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x745
1848E	Vika and Stone Skipping brute force, implementation, math, number theory	2600	x741
763C	Timofey and remoduling brute force, implementation, math, number theory	2600	x704
982E	Billiard geometry, number theory	2600	x689
1778F	Maximizing Root dfs and similar, dp, graphs, math, number theory, trees	2600	x598
703E	Mishka and Divisors dp, number theory	2600	x586
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x579
1582G	Kuzya and Homework data structures, number theory	2600	x561
963C	Cutting Rectangle brute force, math, number theory	2600	x560
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x497
1945H	GCD is Greater brute force, data structures, math, number theory	2600	x490
93E	Lostborn dp, math, number theory	2600	x434
360D	Levko and Sets number theory	2600	x386
185D	Visit of the Great math, number theory	2600	x382
1493F	Enchanted Matrix bitmasks, interactive, number theory	2600	x375
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x297