Problemset - Codeforces

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Codeforces Round #688 (Div. 2)
4 days

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Difficulty: —

number theory

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Problems

#	Name
1375I	Cubic Lattice geometry, math, matrices, number theory	3500	x40
1264F	Beautiful Fibonacci Problem constructive algorithms, number theory	3500	x91
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x97
1310F	Bad Cryptography math, number theory	3400	x30
1190F	Tokitsukaze and Powers number theory, probabilities	3400	x51
756F	Long number expression parsing, math, number theory	3400	x58
773F	Test Data Generation combinatorics, divide and conquer, dp, fft, math, number theory	3400	x92
804F	Fake bullions combinatorics, dfs and similar, dp, graphs, number theory	3400	x95
1098E	Fedya the Potter binary search, implementation, math, number theory	3400	x99
1103E	Radix sum fft, math, number theory	3400	x114
1148G	Gold Experience constructive algorithms, graphs, math, number theory, probabilities	3300	x117
986F	Oppa Funcan Style Remastered graphs, math, number theory, shortest paths	3300	x213
582D	Number of Binominal Coefficients dp, math, number theory	3300	x262
765G	Math, math everywhere brute force, dp, math, meet-in-the-middle, number theory	3200	x35
500G	New Year Running number theory, trees	3200	x71
1091G	New Year and the Factorisation Collaboration interactive, math, number theory	3200	x109
1223G	Wooden Raft binary search, math, number theory	3200	x125
913G	Power Substring math, number theory	3200	x125
755G	PolandBall and Many Other Balls combinatorics, divide and conquer, dp, fft, math, number theory	3200	x338
1184A3	Heidi Learns Hashing (Hard) fft, math, number theory	3100	x52
1225G	To Make 1 bitmasks, constructive algorithms, dp, greedy, number theory	3100	x176
653G	Move by Prime combinatorics, math, number theory	3100	x237
516E	Drazil and His Happy Friends math, number theory	3100	x237
809E	Surprise me! divide and conquer, math, number theory, trees	3100	x348
438E	The Child and Binary Tree combinatorics, divide and conquer, fft, number theory	3100	x900
698F	Coprime Permutation combinatorics, number theory	3000	x129
346E	Doodle Jump math, number theory	3000	x149
1418F	Equal Product data structures, math, number theory, two pointers	3000	x172
819D	Mister B and Astronomers number theory	2900	x125
819C	Mister B and Beacons on Field number theory	2900	x158
717A	Festival Organization math, number theory	2900	x158
449E	Jzzhu and Squares dp, math, number theory	2900	x178
896D	Nephren Runs a Cinema chinese remainder theorem, combinatorics, math, number theory	2900	x220
1030G	Linear Congruential Generator number theory	2900	x240
1198F	GCD Groups 2 greedy, number theory, probabilities	2900	x344
1285F	Classical? binary search, combinatorics, number theory	2900	x504
338D	GCD Table chinese remainder theorem, math, number theory	2900	x548
585E	Present for Vitalik the Philatelist combinatorics, math, number theory	2900	x569
1436F	Sum Over Subsets combinatorics, math, number theory	2800	x209
722F	Cyclic Cipher chinese remainder theorem, data structures, implementation, number theory, two pointers	2800	x294
986E	Prince's Problem brute force, data structures, math, number theory, trees	2800	x404
1208G	Polygons greedy, math, number theory	2800	x434
633G	Yash And Trees bitmasks, data structures, dfs and similar, math, number theory	2800	x467
1404D	Game of Pairs constructive algorithms, dfs and similar, interactive, math, number theory	2800	x483
671C	Ultimate Weirdness of an Array data structures, number theory	2800	x485
774G	Perfectionist Arkadiy *special problem, number theory	2700	x73
774F	Pens And Days Of Week *special problem, binary search, number theory	2700	x78
1016G	Appropriate Team bitmasks, math, number theory	2700	x152
838D	Airplane Arrangements math, number theory	2700	x153
1182F	Maximum Sine binary search, data structures, number theory	2700	x194
1109E	Sasha and a Very Easy Test data structures, number theory	2700	x289
870F	Paths data structures, number theory	2700	x317
1422F	Boring Queries data structures, math, number theory	2700	x325
995E	Number Clicker divide and conquer, graphs, meet-in-the-middle, number theory	2700	x349
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x408
961G	Partitions combinatorics, math, number theory	2700	x491
1292D	Chaotic V. dp, graphs, greedy, math, number theory, trees	2700	x521
906D	Power Tower chinese remainder theorem, math, number theory	2700	x756
1027G	X-mouse in the Campus bitmasks, math, number theory	2600	x193
303D	Rotatable Number math, number theory	2600	x193
185D	Visit of the Great math, number theory	2600	x266
360D	Levko and Sets number theory	2600	x280
93E	Lostborn dp, math, number theory	2600	x300
1257G	Divisor Set divide and conquer, fft, greedy, math, number theory	2600	x360
1398G	Running Competition bitmasks, fft, math, number theory	2600	x392
542D	Superhero's Job dfs and similar, dp, hashing, math, number theory	2600	x392
982E	Billiard geometry, number theory	2600	x400
963C	Cutting Rectangle brute force, math, number theory	2600	x412
703E	Mishka and Divisors dp, number theory	2600	x433
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x479
1355F	Guess Divisors Count constructive algorithms, interactive, number theory	2600	x494
763C	Timofey and remoduling brute force, implementation, math, number theory	2600	x550
724G	Xor-matic Number of the Graph bitmasks, graphs, math, number theory, trees	2600	x565
1278F	Cards combinatorics, dp, math, number theory, probabilities	2600	x627
1406E	Deleting Numbers interactive, math, number theory	2600	x960
1325E	Ehab's REAL Number Theory Problem brute force, dfs and similar, graphs, number theory, shortest paths	2600	x1231
294D	Shaass and Painter Robot brute force, implementation, number theory	2500	x238
645F	Cowslip Collections combinatorics, math, number theory	2500	x451
710D	Two Arithmetic Progressions math, number theory	2500	x607
792E	Colored Balls greedy, math, number theory	2500	x702
1427E	Xum bitmasks, constructive algorithms, math, matrices, number theory	2500	x703
1097F	Alex and a TV Show bitmasks, combinatorics, number theory	2500	x775
757E	Bash Plays with Functions brute force, combinatorics, dp, number theory	2500	x789
1174E	Ehab and the Expected GCD Problem combinatorics, dp, math, number theory	2500	x817
594D	REQ data structures, number theory	2500	x824
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x1111
1305F	Kuroni and the Punishment math, number theory, probabilities	2500	x1220
449C	Jzzhu and Apples constructive algorithms, number theory	2500	x1637
55D	Beautiful numbers dp, number theory	2500	x1836
73E	Morrowindows math, number theory	2400	x238
200E	Tractor College implementation, math, number theory, ternary search	2400	x251
665F	Four Divisors data structures, dp, math, number theory, sortings, two pointers	2400	x320
1045B	Space Isaac hashing, number theory	2400	x360
283D	Cows and Cool Sequences dp, math, number theory	2400	x395
922F	Divisibility constructive algorithms, dp, greedy, number theory	2400	x452
293C	Cube Problem brute force, math, number theory	2400	x458
758F	Geometrical Progression brute force, math, number theory	2400	x464
83D	Numbers dp, math, number theory	2400	x550
1194F	Crossword Expert combinatorics, dp, number theory, probabilities, two pointers	2400	x568
17D	Notepad number theory	2400	x577

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