Problemset - Codeforces

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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
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number theory

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Problems

#	Name
237C	Primes on Interval binary search, number theory, two pointers	1600	x5835
236B	Easy Number Challenge implementation, number theory	1300	x14430
235E	Number Challenge combinatorics, dp, implementation, math, number theory	2600	x779
235A	LCM Challenge number theory	1600	x17951
230B	T-primes binary search, implementation, math, number theory	1300	x76673
226C	Anniversary data structures, implementation, math, matrices, number theory	2400	x914
225E	Unsolvable math, number theory	2100	x806
225B	Well-known Numbers binary search, greedy, number theory	1600	x3163
223C	Partial Sums combinatorics, math, number theory	1900	x1568
222C	Reducing Fractions implementation, math, number theory, sortings	1800	x2264
216E	Martian Luck math, number theory	2000	x590
215E	Periodical Numbers combinatorics, dp, number theory	2100	x565
200E	Tractor College implementation, math, number theory, ternary search	2400	x344
199A	Hexadecimal's theorem brute force, constructive algorithms, implementation, number theory	900	x26748
185D	Visit of the Great math, number theory	2600	x443
180B	Divisibility Rules math, number theory	2300	x349
177B2	Rectangular Game number theory	1200	x3031
177B1	Rectangular Game number theory	1000	x4192
172D	Calendar Reform *special problem, number theory	1500	x1402
172B	Pseudorandom Sequence Period *special problem, implementation, number theory	1200	x2790
171F	ucyhf *special problem, brute force, implementation, number theory	1600	x1284
158D	Ice Sculptures *special problem, brute force, number theory	1300	x6253
154B	Colliders math, number theory	1600	x4761
150A	Win or Freeze games, math, number theory	1400	x7867
134B	Pairs of Numbers brute force, dfs and similar, math, number theory	1900	x2051
123A	Prime Permutation implementation, number theory, strings	1300	x3638
122A	Lucky Division brute force, number theory	1000	x125299
121C	Lucky Permutation brute force, combinatorics, number theory	1900	x1288
117B	Very Interesting Game brute force, number theory	1800	x1614
113C	Double Happiness brute force, math, number theory	2200	x1240
111B	Petya and Divisors binary search, data structures, number theory	1900	x3696
93E	Lostborn dp, math, number theory	2600	x502
84A	Toy Army math, number theory	900	x15169
83D	Numbers dp, math, number theory	2400	x890
78C	Beaver Game dp, games, number theory	2000	x1888
75C	Modified GCD binary search, number theory	1600	x12883
74C	Chessboard Billiard dfs and similar, dsu, graphs, number theory	2100	x1290
73E	Morrowindows math, number theory	2400	x361
71C	Round Table Knights dp, math, number theory	1600	x6563
68A	Irrational problem implementation, number theory	1100	x4956
66D	Petya and His Friends constructive algorithms, math, number theory	1700	x3187
64E	Prime Segment *special problem, brute force, math, number theory	1800	x243
59B	Fortune Telling implementation, number theory	1200	x6922
55D	Beautiful numbers dp, number theory	2500	x3937
45G	Prime Problem number theory	2200	x1051
27E	Number With The Given Amount Of Divisors brute force, dp, number theory	2000	x4253
26A	Almost Prime number theory	900	x31962
17D	Notepad number theory	2400	x1098
17A	Noldbach problem brute force, math, number theory	1000	x16799
16C	Monitor binary search, number theory	1800	x4798
10C	Digital Root number theory	2000	x1469
7C	Line math, number theory	1800	x4669

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