| 1 |
1 A |
Theater Square |
Question |
Solution |
| 2 |
2 A |
Winner |
Question |
Solution |
| 3 |
4 A |
Watermelon |
Question |
Solution |
| 4 |
4 C |
Registration System |
Question |
Solution |
| 5 |
9 A |
Die Roll |
Question |
Solution |
| 6 |
11 A |
Increasing Sequence |
Question |
Solution |
| 7 |
17 A |
Noldbach problem |
Question |
Solution |
| 8 |
22 A |
Second Order Statistics |
Question |
Solution |
| 9 |
34 A |
Reconnaissance 2 |
Question |
Solution |
| 10 |
34 B |
Sale |
Question |
Solution |
| 11 |
41 A |
Translation |
Question |
Solution |
| 12 |
45 A |
Codecraft III |
Question |
Solution |
| 13 |
50 A |
DominoPiling |
Question |
Solution |
| 14 |
59 A |
Word |
Question |
Solution |
| 15 |
71 A |
Way Too Long Words |
Question |
Solution |
| 16 |
74 A |
Room Leader |
Question |
Solution |
| 17 |
110 A |
Nearly Lucky Number |
Question |
Solution |
| 18 |
112 A |
Petya And Strings |
Question |
Solution |
| 19 |
116 A |
Tram |
Question |
Solution |
| 20 |
118 B |
Present from Lena |
Question |
Solution |
| 21 |
122 A |
Lucky Division |
Question |
Solution |
| 22 |
122 B |
Lucky Substring |
Question |
Solution |
| 23 |
131 A |
cAPS lOCK |
Question |
Solution |
| 24 |
136 A |
Presents |
Question |
Solution |
| 25 |
141 A |
Amusing Joke |
Question |
Solution |
| 26 |
144 A |
Arrival of the General |
Question |
Solution |
| 27 |
148 A |
Insomnia cure |
Question |
Solution |
| 28 |
151 A |
Soft Drinking |
Question |
Solution |
| 29 |
155 A |
I_love_%username% |
Question |
Solution |
| 30 |
158 A |
Next Round |
Question |
Solution |
| 31 |
158 B |
Taxi |
Question |
Solution |
| 32 |
189 A |
Cut Ribbon |
Question |
Solution |
| 33 |
200 B |
Drinks |
Question |
Solution |
| 34 |
208 A |
Dubstep |
Question |
Solution |
| 35 |
230 B |
T-primes |
Question |
Solution |
| 36 |
231 A |
Team |
Question |
Solution |
| 37 |
236 A |
Boy Or Girl |
Question |
Solution |
| 38 |
263 A |
Beautiful Matrix |
Question |
Solution |
| 39 |
266 A |
Stones on the Table |
Question |
Solution |
| 40 |
266 B |
Queue at the School |
Question |
Solution |
| 41 |
268 A |
Games |
Question |
Solution |
| 42 |
271 A |
Beautiful Year |
Question |
Solution |
| 43 |
281 A |
Word Capitalization |
Question |
Solution |
| 44 |
282 A |
Bit++ |
Question |
Solution |
| 45 |
313 A |
Ilya and Bank Account |
Question |
Solution |
| 46 |
318 A |
Even Odds |
Question |
Solution |
| 47 |
339 A |
Helpful Maths |
Question |
Solution |
| 48 |
343 B |
Alternating Current |
Question |
Solution |
| 49 |
344 A |
Magnets |
Question |
Solution |
| 50 |
349 A |
Cinema Line |
Question |
Solution |
| 51 |
411 A |
Password Check |
Question |
Solution |
| 52 |
421 A |
Pasha and Hamsters |
Question |
Solution |
| 53 |
456 B |
Fedya and Maths |
Question |
Solution |
| 54 |
466 A |
Cheap Travel |
Question |
Solution |
| 55 |
474 B |
Worms |
Question |
Solution |
| 56 |
478 C |
Table Decorations |
Question |
Solution |
| 57 |
486 A |
Calculating Function |
Question |
Solution |
| 58 |
489 B |
BerSU Ball |
Question |
Solution |
| 59 |
492 A |
Vanya and Cubes |
Question |
Solution |
| 60 |
492 B |
Vanya and Lanterns |
Question |
Solution |
| 61 |
510 A |
Fox And Snake |
Question |
Solution |
| 62 |
514 A |
Chewbaсca and Number |
Question |
Solution |
| 63 |
525 A |
Vitaliy and Pie |
Question |
Solution |
| 64 |
546 A |
Soldier and Bananas |
Question |
Solution |
| 65 |
584 A |
Olesya and Rodion |
Question |
Solution |
| 66 |
599 A |
Patrick and Shopping |
Question |
Solution |
| 67 |
617 A |
Elephant |
Question |
Solution |
| 68 |
630 A |
Again Twenty Five! |
Question |
Solution |
| 69 |
677 A |
Vanya and Fence |
Question |
Solution |
| 70 |
705 A |
Hulk |
Question |
Solution |
| 71 |
706 B |
Interesting drink |
Question |
Solution |
| 72 |
734 A |
Anton and Danik |
Question |
Solution |
| 73 |
742 A |
Arpas hard exam and Mehrdads naive cheat |
Question |
Solution |
| 74 |
791 A |
Bear And Big Brother |
Question |
Solution |
| 75 |
854 A |
Fraction |
Question |
Solution |
| 76 |
855 A |
Tom Riddle's Diary |
Question |
Solution |
| 77 |
977 A |
Wrong Substraction |
Question |
Solution |
| 78 |
1068 A |
Birthday |
Question |
Solution |
| 79 |
1076 C |
Meme Problem |
Question |
Solution |
| 80 |
1088 A |
Ehab and another construction problem |
Question |
Solution |
| 81 |
1118 B |
Tanya and Candies |
Question |
Solution |
| 82 |
1144 C |
Two Shuffled Sequences |
Question |
Solution |
| 83 |
1196 A |
Three Piles of Candies |
Question |
Solution |
| 84 |
1295 A |
Display The Number |
Question |
Solution |
| 85 |
1296 A |
Array with Odd Sum |
Question |
Solution |
| 86 |
1311 A |
Add Odd or Subtract Even |
Question |
Solution |
| 87 |
1328 A |
Divisibility Problem |
Question |
Solution |
| 88 |
1341 A |
Nastya and Rice |
Question |
Solution |
| 89 |
1343 B |
Balanced Array |
Question |
Solution |
| 90 |
1352 C |
K-th Not Divisible by n |
Question |
Solution |
| 91 |
1360 B |
Honest Coach |
Question |
Solution |
| 92 |
1364 A |
XXXXX |
Question |
Solution |
| 93 |
1367 B |
Even Array |
Question |
Solution |
| 94 |
1389 A |
LCM Problem |
Question |
Solution |
| 95 |
1391 B |
Fix You |
Question |
Solution |
| 96 |
1399 A |
Remove Smallest |
Question |
Solution |
| 97 |
1426 A |
Floor Number |
Question |
Solution |
| 98 |
1512 A |
Spy Detected! |
Question |
Solution |
| 99 |
1582 B |
Luntik and Subsequences |
Question |
Solution |
| 100 |
1624 B |
Make AP |
Question |
Solution |
| 101 |
1633 A |
Div. 7 |
Question |
Solution |
| 102 |
1675 B |
Make It Increasing |
Question |
Solution |
| 103 |
1676 A |
Lucky |
Question |
Solution |
| 104 |
1679 A |
AvtoBus |
Question |
Solution |
| 105 |
1692 A |
Marathon |
Question |
Solution |
| 106 |
1696 B |
NIT Destroys the Universe |
Question |
Solution |
| 107 |
1703 A |
YES or YES |
Question |
Solution |
| 108 |
1719 A |
Chip Game |
Question |
Solution |
| 109 |
1719 B |
Mathematical Circus |
Question |
Solution |
| 110 |
1721 B |
Deadly Laser |
Question |
Solution |
| 111 |
1726 A |
Mainak and Array |
Question |
Solution |
| 112 |
1742 A |
Sum |
Question |
Solution |
| 113 |
1742 C |
Stripes |
Question |
Solution |
| 114 |
1746 B |
Rebellion |
Question |
Solution |
| 115 |
1748 A |
The Ultimate Square |
Question |
Solution |
| 116 |
1758 B |
XOR = Average |
Question |
Solution |
| 117 |
1760 A |
Medium Number |
Question |
Solution |
| 118 |
1761 A |
Two Permutations |
Question |
Solution |
| 119 |
1766 A |
Extremely Round |
Question |
Solution |
| 120 |
1773 F |
Football |
Question |
Solution |
| 121 |
1777 A |
Everybody Likes Good Arrays! |
Question |
Solution |
| 122 |
1783 A |
Make it Beautiful |
Question |
Solution |
| 123 |
1788 A |
One and Two |
Question |
Solution |
| 124 |
1789 A |
Serval and Mocha's Array |
Question |
Solution |
| 125 |
1791 B |
Following Directions |
Question |
Solution |
| 126 |
1791 C |
Prepend and Append |
Question |
Solution |
| 127 |
1792 A |
Gaming Forces |
Question |
Solution |
| 128 |
1794 B |
Not Dividing |
Question |
Solution |
| 129 |
1795 B |
Ideal Point |
Question |
Solution |
| 130 |
1800 A |
Is It a Cat |
Question |
Solution |
| 131 |
1805 A |
We Need the Zero |
Question |
Solution |
| 132 |
1806 A |
Walking Master |
Question |
Solution |
| 133 |
1807 D |
Odd Queries |
Question |
Solution |
| 134 |
1811 A |
Insert Digit |
Question |
Solution |
| 135 |
1814 A |
Coins |
Question |
Solution |
| 136 |
1818 B |
Indivisible |
Question |
Solution |
| 137 |
1822 A |
TubeTube Feed |
Question |
Solution |
| 138 |
1822 C |
Bun Lover |
Question |
Solution |
| 139 |
1828 A |
Divisible Array |
Question |
Solution |
| 140 |
1828 B |
Permutation Swap |
Question |
Solution |
| 141 |
1829 A |
Love Story |
Question |
Solution |
| 142 |
1829 B |
Blank Spaces |
Question |
Solution |
| 143 |
1829 C |
Mr. Perfectly Fine |
Question |
Solution |
| 144 |
1829 D |
Gold Rush |
Question |
Solution |
| 145 |
1831 A |
Twin Permutations |
Question |
Solution |
| 146 |
1832 A |
New Palindrome |
Question |
Solution |
| 147 |
1832 B |
Maximum Sum |
Question |
Solution |
| 148 |
1833 A |
Musical Puzzle |
Question |
Solution |
| 149 |
1833 B |
Restore the Weather |
Question |
Solution |
| 150 |
1833 C |
Vlad Building Beautiful Array |
Question |
Solution |
| 151 |
1834 A |
Unit Array |
Question |
Solution |
| 152 |
1837 A |
Grasshopper on a Line |
Question |
Solution |
| 153 |
1837 B |
Comparison String |
Question |
Solution |
| 154 |
1841 B |
Keep it Beautiful |
Question |
Solution |
| 155 |
1843 A |
Sasha and Array Coloring |
Question |
Solution |
| 156 |
1843 B |
Long Long |
Question |
Solution |
| 157 |
1844 A |
Subtraction Game |
Question |
Solution |
| 158 |
1845 A |
Forbidden Integer |
Question |
Solution |
| 159 |
1846 A |
Rudolph and Cut the Rope |
Question |
Solution |
| 160 |
1846 B |
Rudolph and Tic-Tac-Toe |
Question |
Solution |
| 161 |
1846 C |
Rudolf and the Another Competition |
Question |
Solution |
| 162 |
1848 A |
Vika and Her Friends |
Question |
Solution |
| 163 |
1849 A |
Morning Sandwich |
Question |
Solution |
| 164 |
1849 B |
Monsters |
Question |
Solution |
| 165 |
1850 A |
To My Critics |
Question |
Solution |
| 166 |
1850 B |
Ten Words of Wisdom |
Question |
Solution |
| 167 |
1850 C |
Word on the Paper |
Question |
Solution |
| 168 |
1850 D |
Balanced Round |
Question |
Solution |
| 169 |
1851 A |
Escalator Conversations |
Question |
Solution |
| 170 |
1851 B |
Parity Sort |
Question |
Solution |
| 171 |
1851 C |
Tiles Comeback |
Question |
Solution |
| 172 |
1853 A |
Desorting |
Question |
Solution |
| 173 |
1855 A |
Dalton the Teacher |
Question |
Solution |
| 174 |
1855 B |
Longest Divisors Interval |
Question |
Solution |
| 175 |
1856 B |
Good Arrays |
Question |
Solution |
| 176 |
1857 A |
Array Coloring |
Question |
Solution |
| 177 |
1857 B |
Maximum Rounding |
Question |
Solution |
| 178 |
1857 C |
Assembly via Minimums |
Question |
Solution |
| 179 |
1858 A |
Buttons |
Question |
Solution |
| 180 |
1859 A |
United We Stand |
Question |
Solution |
| 181 |
1860 A |
Not a Substring |
Question |
Solution |
| 182 |
1862 A |
Gift Carpet |
Question |
Solution |
| 183 |
1862 B |
Sequence Game |
Question |
Solution |
| 184 |
1863 A |
Channel |
Question |
Solution |
| 185 |
1864 A |
Increasing and Decreasing |
Question |
Solution |
| 186 |
1866 A |
Ambitious Kid |
Question |
Solution |
| 187 |
1869 A |
Make It Zero |
Question |
Solution |
| 188 |
1870 A |
MEXanized Array |
Question |
Solution |
| 189 |
1872 A |
Two Vessels |
Question |
Solution |
| 190 |
1872 B |
The Corridor or There and Back Again |
Question |
Solution |
| 191 |
1872 C |
Non-coprime Split |
Question |
Solution |
| 192 |
1873 A |
Short Sort |
Question |
Solution |
| 193 |
1873 B |
Good Kid |
Question |
Solution |
| 194 |
1873 C |
Target Practice |
Question |
Solution |
| 195 |
1873 D |
1D Eraser |
Question |
Solution |
| 196 |
1875 A |
Jellyfish and Undertale |
Question |
Solution |
| 197 |
1877 A |
Goals of Victory |
Question |
Solution |
| 198 |
1878 A |
How Much Does Daytona Cost |
Question |
Solution |
| 199 |
1878 B |
Aleksa and Stack |
Question |
Solution |
| 200 |
1878 C |
Vasilije in Cacak |
Question |
Solution |
| 201 |
1879 A |
Rigged! |
Question |
Solution |
| 202 |
1879 B |
Chips on the Board |
Question |
Solution |
| 203 |
1881 A |
Don't Try to Count |
Question |
Solution |
| 204 |
1881 B |
Three Threadlets |
Question |
Solution |
| 205 |
1881 C |
Perfect Square |
Question |
Solution |
| 206 |
1883 B |
Chemistry |
Question |
Solution |
| 207 |
1890 A |
Doremy's Paint 3 |
Question |
Solution |
| 208 |
1890 B |
Qingshan Loves Strings |
Question |
Solution |
| 209 |
1891 A |
Sorting with Twos |
Question |
Solution |
| 210 |
1894 A |
Secret Sport |
Question |
Solution |
| 211 |
1895 A |
Treasure Chest |
Question |
Solution |
| 212 |
1895 B |
Points and Minimum Distance |
Question |
Solution |
| 213 |
1896 A |
Jagged Swaps |
Question |
Solution |
| 214 |
1896 B |
AB Flipping |
Question |
Solution |
| 215 |
1898 A |
Milica and String |
Question |
Solution |
| 216 |
1899 A |
Game with Integers |
Question |
Solution |
| 217 |
1900 A |
Cover in Water |
Question |
Solution |
| 218 |
1900 B |
Laura and Operations |
Question |
Solution |
| 219 |
1901 A |
Line Trip |
Question |
Solution |
| 220 |
1902 A |
Binary Imbalance |
Question |
Solution |
| 221 |
1903 A |
Halloumi Boxes |
Question |
Solution |
| 222 |
1904 A |
Forked! |
Question |
Solution |
| 223 |
1904 B |
Collecting Game |
Question |
Solution |
| 224 |
1905 A |
Constructive Problems |
Question |
Solution |
| 225 |
1905 B |
Begginer's Zelda |
Question |
Solution |
| 226 |
1905 C |
Largest Subsequence |
Question |
Solution |
| 227 |
1907 A |
Rook |
Question |
Solution |
| 228 |
1907 B |
YetnotherrokenKeoard |
Question |
Solution |
| 229 |
1907 C |
Removal of Unattractive Pairs |
Question |
Solution |
| 230 |
1909 A |
Distinct Buttons |
Question |
Solution |
| 231 |
1912 L |
LOL Lovers |
Question |
Solution |
| 232 |
1913 A |
Rating Increase |
Question |
Solution |
| 233 |
1913 B |
Swap and Delete |
Question |
Solution |
| 234 |
1913 C |
Game with Multiset |
Question |
Solution |
| 235 |
1914 A |
Problemsolving Log |
Question |
Solution |
| 236 |
1914 B |
Preparing for the Contest |
Question |
Solution |
| 237 |
1914 C |
Quests |
Question |
Solution |
| 238 |
1914 D |
Three Activities |
Question |
Solution |
| 239 |
1914 E1 |
Game with Marbles (Easy Version) |
Question |
Solution |
| 240 |
1914 E2 |
Game with Marbles (Hard Version) |
Question |
Solution |
| 241 |
1915 A |
Odd One Out |
Question |
Solution |
| 242 |
1915 B |
Not Quite Latin Square |
Question |
Solution |
| 243 |
1915 C |
Can I Square |
Question |
Solution |
| 244 |
1915 D |
Unnatural Language Processing |
Question |
Solution |
| 245 |
1915 E |
Romantic Glasses |
Question |
Solution |
| 246 |
1916 A |
2023 |
Question |
Solution |
| 247 |
1916 B |
Two Divisors |
Question |
Solution |
| 248 |
1916 C |
Training Before the Olympiad |
Question |
Solution |
| 249 |
1916 D |
Mathematical Problem |
Question |
Solution |
| 250 |
1917 A |
Least Product |
Question |
Solution |
| 251 |
1917 B |
Erase First or Second Letter |
Question |
Solution |
| 252 |
1918 A |
Brick Wall |
Question |
Solution |
| 253 |
1918 B |
Minimize Inversions |
Question |
Solution |
| 254 |
1919 A |
Wallet Exchange |
Question |
Solution |
| 255 |
1919 B |
Plus-Minus Split |
Question |
Solution |
| 256 |
1920 A |
Satisfying Constraints |
Question |
Solution |
| 257 |
1920 B |
Summation Game |
Question |
Solution |
| 258 |
1921 A |
Square |
Question |
Solution |
| 259 |
1921 B |
Arranging Cats |
Question |
Solution |
| 260 |
1921 C |
Sending Messages |
Question |
Solution |
| 261 |
1921 D |
Very Different Array |
Question |
Solution |
| 262 |
1923 A |
Moving Chips |
Question |
Solution |
| 263 |
1923 B |
Monsters Attack! |
Question |
Solution |
| 264 |
1927 A |
Make it White |
Question |
Solution |
| 265 |
1927 B |
Following the String |
Question |
Solution |
| 266 |
1927 C |
Choose the Different Ones |
Question |
Solution |
| 267 |
1927 D |
Find the Different Ones! |
Question |
Solution |
| 268 |
1927 E |
Klever Permutation |
Question |
Solution |
| 269 |
1928 A |
Rectangle Cutting |
Question |
Solution |
| 270 |
1928 B |
Equalize |
Question |
Solution |
| 271 |
1929 A |
Sasha and the Beautiful Array |
Question |
Solution |
| 272 |
1929 B |
Sasha and the Drawing |
Question |
Solution |
| 273 |
1930 A |
Maximise The Score |
Question |
Solution |
| 274 |
1930 B |
Permutation Printing |
Question |
Solution |
| 275 |
1931 A |
Recovering a Small String |
Question |
Solution |
| 276 |
1931 B |
Make Equal |
Question |
Solution |
| 277 |
1931 C |
Make Equal Again |
Question |
Solution |
| 278 |
1933 A |
Turtle Puzzle Rearrange and Negate |
Question |
Solution |
| 279 |
1933 B |
Turtle Math Fast Three Task |
Question |
Solution |
| 280 |
1933 C |
Turtle Fingers Count the Values of k |
Question |
Solution |
| 281 |
1945 A |
Setting up Camp |
Question |
Solution |
| 282 |
1955 A |
Yogurt Sale |
Question |
Solution |
| 283 |
1955 B |
Progressive Square |
Question |
Solution |
| 284 |
1955 C |
Inhabitant of the Deep Sea |
Question |
Solution |
| 285 |
1955 D |
Inaccurate Subsequence Search |
Question |
Solution |
| 286 |
1955 E |
Long Inversions |
Question |
Solution |
| 287 |
1955 F |
Unfair Game |
Question |
Solution |
| 288 |
1956 A |
Nene's Game |
Question |
Solution |
| 289 |
1956 B |
Nene and the Card Game |
Question |
Solution |
| 290 |
1956 C |
Nene's Magical Matrix |
Question |
Solution |
| 291 |
1957 A |
Stickogon |
Question |
Solution |
| 292 |
1957 B |
A BIT of a Construction |
Question |
Solution |
