| 1 |
Twin Primes |
UVA |
|
|
1 |
| 2 |
Goldbach's Conjecture |
UVA |
|
|
1 |
| 3 |
Play with Floor and Ceil |
UVA |
|
|
1 |
| 4 |
Alyona and Numbers |
Codeforces |
|
Codeforces Round #358 (Div. 2) |
1 |
| 5 |
Prime Generator |
SPOJ |
|
|
1 |
| 6 |
Ones |
UVA |
|
|
1 |
| 7 |
LCM Sum |
SPOJ |
|
|
1 |
| 8 |
T-primes |
Codeforces |
|
Codeforces Round #142 (Div. 2) |
1 |
| 9 |
String Task |
Codeforces |
|
Codeforces Beta Round #89 (Div. 2) |
1 |
| 10 |
Again Twenty Five! |
Codeforces |
|
Experimental Educational Round: VolBIT Formulas Blitz |
1 |
| 11 |
Prime Number Theorem |
SPOJ |
|
|
1 |
| 12 |
Bear and Poker |
Codeforces |
|
Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 1) & Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) |
1 |
| 13 |
The Moronic Cowmpouter |
SPOJ |
|
|
1 |
| 14 |
Almost Prime |
Codeforces |
|
Codeforces Beta Round #26 (Codeforces format) |
1 |
| 15 |
A and B and Team Training |
Codeforces |
|
Codeforces Round #294 (Div. 2) |
1 |
| 16 |
Divisor Summation |
SPOJ |
|
|
1 |
| 17 |
Prime Cuts |
UVA |
|
|
1 |
| 18 |
Fedya and Maths |
Codeforces |
|
Codeforces Round #260 (Div. 2) |
1 |
| 19 |
Almost Prime Numbers |
UVA |
|
|
1 |
| 20 |
Hexadecimal's theorem |
Codeforces |
|
Codeforces Round #125 (Div. 2) |
1 |
| 21 |
Factorial |
SPOJ |
|
|
1 |
| 22 |
Prime or Not |
SPOJ |
|
|
1 |
| 23 |
Toy Army |
Codeforces |
|
Codeforces Beta Round #72 (Div. 2 Only) |
1 |
| 24 |
Arpa’s hard exam and Mehrdad’s naive cheat |
Codeforces |
|
Codeforces Round #383 (Div. 2) |
1 |
| 25 |
Fombinatorial |
CodeChef |
|
|
1 |
| 26 |
Ilya and Bank Account |
Codeforces |
|
Codeforces Round #186 (Div. 2) |
1 |
| 27 |
Simply Emirp |
UVA |
|
|
1 |
| 28 |
Design Tutorial: Learn from Math |
Codeforces |
|
Codeforces Round #270 |
1 |
| 29 |
Graph Connectivity |
UVA |
|
|
1 |
| 30 |
Two squares or not two squares |
SPOJ |
|
|
1 |
| 31 |
The Equation |
SGU |
|
|
1 |
| 32 |
Euler Totient Function |
SPOJ |
|
|
1 |
| 33 |
GCD Extreme |
SPOJ |
|
|
1 |
| 34 |
The primary problem |
UVA |
|
|
1 |
| 35 |
Tip Top Game |
SPOJ |
|
|
1 |
| 36 |
Bachgold Problem |
Codeforces |
|
Codeforces Round #388 (Div. 2) |
1 |
| 37 |
Factors and Factorials |
UVA |
|
|
1 |
| 38 |
Factorial |
Live Archive |
2000 |
Europe - Central |
1 |
| 39 |
Panoramix's Prediction |
Codeforces |
|
Codeforces Beta Round #69 (Div. 2 Only) |
1 |
| 40 |
Vasya and Petya's Game |
Codeforces |
|
Codeforces Round #319 (Div. 1) & Codeforces Round #319 (Div. 2) |
1 |
| 41 |
Lucky Division |
Codeforces |
|
Codeforces Beta Round #91 (Div. 2 Only) |
1 |
| 42 |
Marbles |
SPOJ |
|
|
1 |
| 43 |
Cifera |
Codeforces |
|
Codeforces Beta Round #86 (Div. 2 Only) |
1 |
| 44 |
Divisors |
SPOJ |
|
|
1 |
| 45 |
Prime Words |
UVA |
|
|
1 |
| 46 |
Integer Factorization (15 digits) |
SPOJ |
|
|
1 |
| 47 |
Goldbach's Conjecture (II) |
UVA |
|
|
1 |
| 48 |
Count the factors |
TJU |
|
|
1 |
| 49 |
Totient Extreme |
SPOJ |
|
|
1 |
| 50 |
Multiplication Table |
Codeforces |
|
Codeforces Round #319 (Div. 2) |
1 |
| 51 |
Game of Lines |
SPOJ |
|
|
1 |
| 52 |
Medium Factorization |
SPOJ |
|
|
1 |
| 53 |
Relatives |
UVA |
|
|
1 |
| 54 |
Factovisors |
UVA |
|
|
1 |
| 55 |
Celebrity jeopardy |
UVA |
|
|
1 |
| 56 |
Drazil and His Happy Friends |
Codeforces |
|
Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) |
2 |
| 57 |
Divisor Summation (Hard) |
SPOJ |
|
|
2 |
| 58 |
Odd Numbers of Divisors |
SPOJ |
|
|
2 |
| 59 |
Sort fractions |
SPOJ |
|
|
2 |
| 60 |
Pride |
Codeforces |
|
Codeforces Round #446 (Div. 1) & Codeforces Round #446 (Div. 2) |
2 |
| 61 |
Vladik and fractions |
Codeforces |
|
Codeforces Round #384 (Div. 2) |
2 |
| 62 |
Goldbach and Euler |
UVA |
|
|
2 |
| 63 |
Playing with Marbles |
SPOJ |
|
|
2 |
| 64 |
Psycho |
SPOJ |
|
|
2 |
| 65 |
Mr. Azad and his Son!!!!! |
UVA |
|
|
2 |
| 66 |
Marbles |
UVA |
|
|
2 |
| 67 |
Taxes |
Codeforces |
|
Codeforces Round #382 (Div. 2) & Codeforces Round #382 (Div. 1) |
2 |
| 68 |
Minimum Number |
SPOJ |
|
|
2 |
| 69 |
TEX Quotes |
Live Archive |
1994 |
North America - East Central NA |
2 |
| 70 |
LCM Challenge |
Codeforces |
|
Codeforces Round #146 (Div. 1) & Codeforces Round #146 (Div. 2) |
2 |
| 71 |
Number Theory for Newbies |
UVA |
|
|
2 |
| 72 |
Dima and Lisa |
Codeforces |
|
Codeforces Round #324 (Div. 2) |
2 |
| 73 |
Prime Matrix |
Codeforces |
|
Codeforces Round #166 (Div. 2) |
2 |
| 74 |
Rational Resistance |
Codeforces |
|
Codeforces Round #200 (Div. 1) & Codeforces Round #200 (Div. 2) |
2 |
| 75 |
Mashmokh and Numbers |
Codeforces |
|
Codeforces Round #240 (Div. 1) & Codeforces Round #240 (Div. 2) |
2 |
| 76 |
Integer Factorization (20 digits) |
SPOJ |
|
|
2 |
| 77 |
Jumping Champion |
UVA |
|
|
2 |
| 78 |
Leha and Function |
Codeforces |
|
Codeforces Round #429 (Div. 1) & Codeforces Round #429 (Div. 2) |
2 |
| 79 |
Square-free integers |
SPOJ |
|
|
2 |
| 80 |
Mint |
UVA |
|
|
2 |
| 81 |
Equation |
SPOJ |
|
|
2 |
| 82 |
Alice and Bob |
Codeforces |
|
Codeforces Round #201 (Div. 1) & Codeforces Round #201 (Div. 2) |
2 |
| 83 |
MCQ Exam |
A2 Online Judge |
|
|
2 |
| 84 |
Arpa’s obvious problem and Mehrdad’s terrible solution |
Codeforces |
|
Codeforces Round #383 (Div. 2) |
2 |
| 85 |
Anagrammatic Primes |
UVA |
|
|
2 |
| 86 |
Ice Sculptures |
Codeforces |
|
VK Cup 2012 Qualification Round 1 |
2 |
| 87 |
Prime Again |
SPOJ |
|
|
2 |
| 88 |
Divisors 2 |
SPOJ |
|
|
2 |
| 89 |
k-th divisor |
Codeforces |
|
Educational Codeforces Round 17 |
2 |
| 90 |
Soldier and Number Game |
Codeforces |
|
Codeforces Round #304 (Div. 2) |
2 |
| 91 |
Primitive Root |
SPOJ |
|
|
2 |
| 92 |
N DIV PHI_N |
SPOJ |
|
|
2 |
| 93 |
Pythagorean Triples |
Codeforces |
|
Codeforces Round #368 (Div. 2) |
2 |
| 94 |
The Bytelandian Cryptographer (Act I) |
SPOJ |
|
|
2 |
| 95 |
Congruence Equation |
SPOJ |
|
|
3 |
| 96 |
Good Sequences |
Codeforces |
|
Codeforces Round #162 (Div. 1) & Codeforces Round #162 (Div. 2) |
3 |
| 97 |
Primal Fear |
SPOJ |
|
|
3 |
| 98 |
Cows and Primitive Roots |
Codeforces |
|
Codeforces Round #174 (Div. 2) |
3 |
| 99 |
Eugeny and Play List |
Codeforces |
|
Codeforces Round #182 (Div. 2) |
3 |
| 100 |
Primes on Interval |
Codeforces |
|
Codeforces Round #147 (Div. 2) |
3 |
| 101 |
Sky Code |
SPOJ |
|
|
3 |
| 102 |
Little Elephant and Numbers |
Codeforces |
|
Codeforces Round #136 (Div. 2) |
3 |
| 103 |
Modified GCD |
Codeforces |
|
Codeforces Beta Round #67 (Div. 2) |
3 |
| 104 |
Fox Dividing Cheese |
Codeforces |
|
Codeforces Round #218 (Div. 2) |
3 |
| 105 |
DDF |
UVA |
|
|
3 |
| 106 |
Win or Freeze |
Codeforces |
|
Codeforces Round #107 (Div. 1) & Codeforces Round #107 (Div. 2) |
3 |
| 107 |
Homework |
SPOJ |
|
|
3 |
| 108 |
GCD Determinant |
SPOJ |
|
|
3 |
| 109 |
Binomial Coefficients |
SPOJ |
|
|
3 |
| 110 |
Chef and Functions |
CodeChef |
|
|
3 |
| 111 |
Mike and gcd problem |
Codeforces |
|
Codeforces Round #410 (Div. 2) |
3 |
| 112 |
The Super Powers |
UVA |
|
|
3 |
| 113 |
A Trivial Problem |
Codeforces |
|
Manthan, Codefest 16 |
3 |
| 114 |
Bear and Prime Numbers |
Codeforces |
|
Codeforces Round #226 (Div. 2) |
3 |
| 115 |
Skyscraper Floors |
SPOJ |
|
|
3 |
| 116 |
Noldbach problem |
Codeforces |
|
Codeforces Beta Round #17 |
3 |
| 117 |
Levko and Permutation |
Codeforces |
|
Codeforces Round #210 (Div. 2) |
3 |
| 118 |
Easy Number Challenge |
Codeforces |
|
Codeforces Round #146 (Div. 2) |
3 |
| 119 |
Quiz |
Codeforces |
|
Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) |
3 |
| 120 |
Routine Problem |
Codeforces |
|
Codeforces Round #196 (Div. 2) |
3 |
| 121 |
Permutation Primes |
Live Archive |
2004 |
Asia - Dhaka |
3 |
| 122 |
The Meaningless Game |
Codeforces |
|
Codeforces Round #426 (Div. 1) & Codeforces Round #426 (Div. 2) |
3 |
| 123 |
Primes or Palindromes? |
Codeforces |
|
Codeforces Round #315 (Div. 1) & Codeforces Round #315 (Div. 2) |
3 |
| 124 |
Petya and Divisors |
Codeforces |
|
Codeforces Beta Round #85 (Div. 1 Only) & Codeforces Beta Round #85 (Div. 2 Only) |
4 |
| 125 |
SETI |
SPOJ |
|
|
4 |
| 126 |
Devu and Partitioning of the Array |
Codeforces |
|
Codeforces Round #251 (Div. 2) |
4 |
| 127 |
Dots |
SPOJ |
|
|
4 |
| 128 |
Skyscraper Floors |
UVA |
|
|
4 |
| 129 |
Find Maximum |
Codeforces |
|
Codeforces Round #205 (Div. 2) |
4 |
| 130 |
Broken Keyboard |
UVA |
|
|
4 |
| 131 |
Subtractions |
Codeforces |
|
Codeforces Testing Round #5 |
4 |
| 132 |
Chilly Willy |
Codeforces |
|
Codeforces Round #152 (Div. 2) |
4 |
| 133 |
Ralph And His Magic Field |
Codeforces |
|
Codeforces Round #447 (Div. 2) |
4 |
| 134 |
The Most Complex Number |
Timus |
|
|
4 |
| 135 |
Irrational problem |
Codeforces |
|
Codeforces Beta Round #62 |
4 |
| 136 |
Rank of a Fraction |
SPOJ |
|
|
4 |
| 137 |
Divisible by Seven |
Codeforces |
|
Codeforces Round #221 (Div. 1) & Codeforces Round #221 (Div. 2) |
4 |
| 138 |
Subtraction |
A2 Online Judge |
|
|
4 |
| 139 |
Colliders |
Codeforces |
|
Codeforces Round #109 (Div. 1) & Codeforces Round #109 (Div. 2) |
4 |
| 140 |
Multipliers |
Codeforces |
|
Codeforces Round #338 (Div. 2) |
4 |
| 141 |
Round Table Knights |
Codeforces |
|
Codeforces Beta Round #65 (Div. 2) |
4 |
| 142 |
Gerald and Giant Chess |
Codeforces |
|
Codeforces Round #313 (Div. 1) & Codeforces Round #313 (Div. 2) |
4 |
| 143 |
Well-known Numbers |
Codeforces |
|
Codeforces Round #139 (Div. 2) |
4 |
| 144 |
Ant colony |
Codeforces |
|
Codeforces Round #271 (Div. 2) |
4 |
| 145 |
Fox And Jumping |
Codeforces |
|
Codeforces Round #290 (Div. 2) & Codeforces Round #290 (Div. 1) |
4 |
| 146 |
Boring Card Game |
Live Archive |
2011 |
Europe - Central |
4 |
| 147 |
Ksusha and Array |
Codeforces |
|
Croc Champ 2013 - Round 2 (Div. 2 Edition) |
4 |
| 148 |
N DIV PHI_N (Hard) |
SPOJ |
|
|
4 |
| 149 |
Gaussian Prime Factors |
Live Archive |
2006 |
Asia - Manila |
4 |
| 150 |
Remainders Game |
Codeforces |
|
Codeforces Round #360 (Div. 1) & Codeforces Round #360 (Div. 2) |
4 |
| 151 |
Fortune Telling |
Codeforces |
|
Codeforces Beta Round #55 (Div. 2) |
4 |
| 152 |
Petya and His Friends |
Codeforces |
|
Codeforces Beta Round #61 (Div. 2) |
5 |
| 153 |
Mike and Foam |
Codeforces |
|
Codeforces Round #305 (Div. 1) & Codeforces Round #305 (Div. 2) |
5 |
| 154 |
Line |
Codeforces |
|
Codeforces Beta Round #7 |
5 |
| 155 |
Chocolate |
Codeforces |
|
Codeforces Round #279 (Div. 2) |
5 |
| 156 |
Moodular Arithmetic |
Codeforces |
|
Codeforces Round #334 (Div. 1) & Codeforces Round #334 (Div. 2) |
5 |
| 157 |
Shaass and Lights |
Codeforces |
|
Codeforces Round #178 (Div. 2) |
5 |
| 158 |
Array and Operations |
Codeforces |
|
Codeforces Round #284 (Div. 1) & Codeforces Round #284 (Div. 2) |
5 |
| 159 |
Roman and Numbers |
Codeforces |
|
Codeforces Round #235 (Div. 2) |
5 |
| 160 |
Vasya and Beautiful Arrays |
Codeforces |
|
Codeforces Round #206 (Div. 1) & Codeforces Round #206 (Div. 2) |
5 |
| 161 |
Rectangular Game |
Codeforces |
|
ABBYY Cup 2.0 - Easy |
5 |
| 162 |
Number With The Given Amount Of Divisors |
Codeforces |
|
Codeforces Beta Round #27 (Codeforces format, Div. 2) |
5 |
| 163 |
Upgrading Array |
Codeforces |
|
Codeforces Round #236 (Div. 2) & Codeforces Round #236 (Div. 1) |
5 |
| 164 |
Monitor |
Codeforces |
|
Codeforces Beta Round #16 (Div. 2 Only) |
5 |
| 165 |
Rectangular Game |
Codeforces |
|
ABBYY Cup 2.0 - Easy |
5 |
| 166 |
Vasily the Bear and Sequence |
Codeforces |
|
Codeforces Round #195 (Div. 2) |
5 |
| 167 |
Anton and School - 2 |
Codeforces |
|
Codeforces Round #404 (Div. 2) |
5 |
| 168 |
Tutorial BFS |
SPOJ |
|
|
5 |
| 169 |
Clique in the Divisibility Graph |
Codeforces |
|
VK Cup 2015 - Finals, online mirror |
5 |
| 170 |
Winter is here |
Codeforces |
|
Codeforces Round #428 (Div. 2) |
5 |
| 171 |
Prime Permutation |
Codeforces |
|
Codeforces Beta Round #92 (Div. 1 Only) & Codeforces Beta Round #92 (Div. 2 Only) |
5 |
| 172 |
Palindrome Degree |
Codeforces |
|
Codeforces Beta Round #7 |
5 |
| 173 |
Pseudorandom Sequence Period |
Codeforces |
|
Croc Champ 2012 - Qualification Round |
5 |
| 174 |
Devu and Flowers |
Codeforces |
|
Codeforces Round #258 (Div. 2) |
6 |
| 175 |
Unusual Sequences |
Codeforces |
|
Codeforces Round #450 (Div. 2) |
6 |
| 176 |
Beautiful numbers |
Codeforces |
|
Codeforces Beta Round #51 |
6 |
| 177 |
Printing some primes (Hard) |
SPOJ |
|
|
6 |
| 178 |
Calendar Reform |
Codeforces |
|
Croc Champ 2012 - Qualification Round |
6 |
| 179 |
DZY Loves Fibonacci Numbers |
Codeforces |
|
Codeforces Round #255 (Div. 1) & Codeforces Round #255 (Div. 2) |
6 |
| 180 |
GukiZ and Binary Operations |
Codeforces |
|
Codeforces Round #307 (Div. 2) |
6 |
| 181 |
Reducing Fractions |
Codeforces |
|
Codeforces Round #137 (Div. 2) |
6 |
| 182 |
Longest Subsequence |
Codeforces |
|
Educational Codeforces Round 9 |
6 |
| 183 |
Beaver Game |
Codeforces |
|
Codeforces Beta Round #70 (Div. 2) |
6 |
| 184 |
Bots |
Codeforces |
|
Bubble Cup 8 - Finals [Online Mirror] |
6 |
| 185 |
Very Interesting Game |
Codeforces |
|
Codeforces Beta Round #88 |
6 |
| 186 |
Pluses everywhere |
Codeforces |
|
Codeforces Round #295 (Div. 2) & Codeforces Round #295 (Div. 1) |
6 |
| 187 |
Divisors |
Codeforces |
|
Codeforces Round #256 (Div. 2) |
6 |
| 188 |
Goldbach++ |
Live Archive |
2005 |
North America - Southeast USA |
6 |
| 189 |
ZS and The Birthday Paradox |
Codeforces |
|
Codeforces Round #369 (Div. 2) |
6 |
| 190 |
Polygon Encoder |
SPOJ |
|
|
6 |
| 191 |
Lucky Permutation |
Codeforces |
|
Codeforces Beta Round #91 (Div. 1 Only) & Codeforces Beta Round #91 (Div. 2 Only) |
6 |
| 192 |
Jzzhu and Apples |
Codeforces |
|
Codeforces Round #257 (Div. 1) & Codeforces Round #257 (Div. 2) |
6 |
| 193 |
Prefix Product Sequence |
Codeforces |
|
Codeforces Round #278 (Div. 1) & Codeforces Round #278 (Div. 2) |
6 |
| 194 |
Apple Tree |
Codeforces |
|
Codeforces Round #202 (Div. 1) & Codeforces Round #202 (Div. 2) |
6 |
| 195 |
Array GCD |
Codeforces |
|
AIM Tech Round (Div. 1) & AIM Tech Round (Div. 2) |
6 |
| 196 |
Divisor Tree |
Codeforces |
|
Codeforces Round #196 (Div. 2) & Codeforces Round #196 (Div. 1) |
7 |
| 197 |
Pairs of Numbers |
Codeforces |
|
Codeforces Testing Round #3 |
7 |
| 198 |
On Sum of Fractions |
Codeforces |
|
Codeforces Round #232 (Div. 1) & Codeforces Round #232 (Div. 2) |
7 |
| 199 |
Double Happiness |
Codeforces |
|
Codeforces Beta Round #86 (Div. 1 Only) & Codeforces Beta Round #86 (Div. 2 Only) |
7 |
| 200 |
Digital Root |
Codeforces |
|
Codeforces Beta Round #10 |
7 |
| 201 |
Integer Factorization (29 digits) |
SPOJ |
|
|
7 |
| 202 |
Number Transformation |
Codeforces |
|
Codeforces Round #153 (Div. 1) & Codeforces Round #153 (Div. 2) |
7 |
| 203 |
Traffic Jams in the Land |
Codeforces |
|
Codeforces Round #284 (Div. 1) |
7 |
| 204 |
Alice, Bob, Oranges and Apples |
Codeforces |
|
Codeforces Round #325 (Div. 1) & Codeforces Round #325 (Div. 2) |
7 |
| 205 |
Bamboo Partition |
Codeforces |
|
Codeforces Round #424 (Div. 1, rated, based on VK Cup Finals) & Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) |
7 |
| 206 |
Sum of Remainders |
Codeforces |
|
Educational Codeforces Round 5 |
7 |
| 207 |
ucyhf |
Codeforces |
|
April Fools Day Contest |
7 |
| 208 |
On Number of Decompositions into Multipliers |
Codeforces |
|
Codeforces Round #232 (Div. 1) & Codeforces Round #232 (Div. 2) |
7 |
| 209 |
Finding the Kth Prime (Hard) |
SPOJ |
|
|
7 |
| 210 |
Chessboard Billiard |
Codeforces |
|
Codeforces Beta Round #68 |
7 |
| 211 |
Notepad |
Codeforces |
|
Codeforces Beta Round #17 |
8 |
| 212 |
Beautiful Set |
Codeforces |
|
Codeforces Round #213 (Div. 1) & Codeforces Round #213 (Div. 2) |
8 |
| 213 |
Superior Periodic Subarrays |
Codeforces |
|
Codeforces Round #323 (Div. 1) & Codeforces Round #323 (Div. 2) |
8 |
| 214 |
REQ |
Codeforces |
|
Codeforces Round #330 (Div. 1) |
8 |
| 215 |
Cube Problem |
Codeforces |
|
Croc Champ 2013 - Round 2 |
8 |
| 216 |
Mishka and Divisors |
Codeforces |
|
Codeforces Round #365 (Div. 2) |
8 |
| 217 |
Ultimate Weirdness of an Array |
Codeforces |
|
Codeforces Round #352 (Div. 1) & Codeforces Round #352 (Div. 2) |
8 |
| 218 |
GCD Table |
Codeforces |
|
Codeforces Round #196 (Div. 1) |
8 |
| 219 |
Timofey and remoduling |
Codeforces |
|
Codeforces Round #395 (Div. 1) & Codeforces Round #395 (Div. 2) |
8 |
| 220 |
Fractions |
UVA |
|
|
8 |
| 221 |
Number Challenge |
Codeforces |
|
Codeforces Round #146 (Div. 1) |
8 |
| 222 |
Prime Problem |
Codeforces |
|
School Team Contest #3 (Winter Computer School 2010/11) |
8 |
| 223 |
Three Horses |
Codeforces |
|
Codeforces Round #166 (Div. 2) |
8 |
| 224 |
Periodical Numbers |
Codeforces |
|
Codeforces Round #132 (Div. 2) |
8 |
| 225 |
Numbers |
Codeforces |
|
Codeforces Beta Round #72 (Div. 1 Only) |
8 |
| 226 |
The Child and Binary Tree |
Codeforces |
|
Codeforces Round #250 (Div. 1) |
8 |
| 227 |
Unsolvable |
Codeforces |
|
Codeforces Round #139 (Div. 2) |
8 |
| 228 |
Ada and Connections |
SPOJ |
|
|
8 |
| 229 |
Cowslip Collections |
Codeforces |
|
CROC 2016 - Elimination Round |
8 |
| 230 |
Cows and Cool Sequences |
Codeforces |
|
Codeforces Round #174 (Div. 1) |
8 |
| 231 |
Martian Luck |
Codeforces |
|
Codeforces Round #133 (Div. 2) |
8 |
| 232 |
Anniversary |
Codeforces |
|
Codeforces Round #140 (Div. 1) & Codeforces Round #140 (Div. 2) |
8 |
| 233 |
Rotatable Number |
Codeforces |
|
Codeforces Round #183 (Div. 1) |
9 |
| 234 |
Visit of the Great |
Codeforces |
|
Codeforces Round #118 (Div. 1) |
9 |
| 235 |
Four Divisors |
Codeforces |
|
Educational Codeforces Round 12 |
9 |
| 236 |
White, Black and White Again |
Codeforces |
|
Testing Round #6 |
9 |
| 237 |
Swap (Easy - Level 2) |
SPOJ |
|
|
9 |
| 238 |
Tractor College |
Codeforces |
|
Codeforces Round #126 (Div. 2) |
9 |
| 239 |
Shaass and Painter Robot |
Codeforces |
|
Codeforces Round #178 (Div. 2) |
9 |
| 240 |
Levko and Sets |
Codeforces |
|
Codeforces Round #210 (Div. 1) |
9 |
| 241 |
Superhero's Job |
Codeforces |
|
VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) |
9 |
| 242 |
Morrowindows |
Codeforces |
|
Codeforces Beta Round #66 |
9 |
| 243 |
Divisibility Rules |
Codeforces |
|
Codeforces Round #116 (Div. 2, ACM-ICPC Rules) |
9 |
| 244 |
Present for Vitalik the Philatelist |
Codeforces |
|
Codeforces Round #325 (Div. 1) |
9 |
| 245 |
Mister B and Astronomers |
Codeforces |
|
Codeforces Round #421 (Div. 1) |
10 |
| 246 |
Number of Binominal Coefficients |
Codeforces |
|
Codeforces Round #323 (Div. 1) |
10 |
| 247 |
Mister B and Beacons on Field |
Codeforces |
|
Codeforces Round #421 (Div. 1) & Codeforces Round #421 (Div. 2) |
10 |
| 248 |
Prime factorization |
Codeforces |
|
VK Cup 2012 Wild-card Round 1 |
10 |
| 249 |
New Year Running |
Codeforces |
|
Good Bye 2014 |
10 |
| 250 |
Nephren Runs a Cinema |
Codeforces |
|
Codeforces Round #449 (Div. 1) |
10 |
| 251 |
Jzzhu and Squares |
Codeforces |
|
Codeforces Round #257 (Div. 1) |
10 |