Starlight: List of Problems

Login | Register

Over 20,000 problems available. AMC 8/10/12 and AIME problems from 2010-2023; USAJMO/USAMO problems from 2002-2023 available. USACO problems from 2014 to 2023 (all divisions). Codeforces, AtCoder, DMOJ problems are added daily around 04:00 AM UTC, which may cause disruptions.

Reset
Filter by type: All Codeforces AtCoder DMOJ USACO AMC 8 AMC 10 AMC 12 AIME USAJMO USAMO

Need help searching? Click for format/examples of problems

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
71 Codeforces 16B: Burglar and Matches
70 Codeforces 16A: Flag
69 Codeforces 15E: Triangles
68 Codeforces 15D: Map
67 Codeforces 15C: Industrial Nim
66 Codeforces 15B: Laser
65 Codeforces 15A: Cottage Village
64 Codeforces 14E: Camels
63 Codeforces 14D: Two Paths
62 Codeforces 14C: Four Segments
61 Codeforces 14B: Young Photographer
60 Codeforces 14A: Letter
59 Codeforces 13E: Holes
58 Codeforces 13D: Triangles
57 Codeforces 13C: Sequence
56 Codeforces 13B: Letter A
55 Codeforces 13A: Numbers
54 Codeforces 12E: Start of the session
53 Codeforces 12D: Ball
52 Codeforces 12C: Fruits
51 Codeforces 12B: Correct Solution?
50 Codeforces 12A: Super Agent
49 Codeforces 11E: Forward, march!
48 Codeforces 11D: A Simple Task
47 Codeforces 11C: How Many Squares?
46 Codeforces 11B: Jumping Jack
45 Codeforces 11A: Increasing Sequence
44 Codeforces 10E: Greedy Change
43 Codeforces 10D: LCIS
42 Codeforces 10C: Digital Root
41 Codeforces 10B: Cinema Cashier
40 Codeforces 10A: Power Consumption Calculation
39 Codeforces 9E: Interestring graph and Apples
38 Codeforces 9D: How many trees?
37 Codeforces 9C: Hexadecimal's Numbers
36 Codeforces 9B: Running Student
35 Codeforces 9A: Die Roll
34 Codeforces 8E: Beads
33 Codeforces 8D: Two Friends
32 Codeforces 8C: Looking for Order
31 Codeforces 8B: Obsession with Robots
30 Codeforces 8A: Train and Peter
29 Codeforces 7E: Defining Macros
28 Codeforces 7D: Palindrome Degree
27 Codeforces 7C: Line
26 Codeforces 7B: Memory Manager
25 Codeforces 7A: Kalevitch and Chess
24 Codeforces 6E: Exposition
23 Codeforces 6D: Lizards and Basements 2
22 Codeforces 6C: Alice, Bob and Chocolate
View links to all pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

AboutPrivacy NoticeRulesProblems listJournalYour profileGitHub

Moon Symbol icon by Icons8Sun icon by Icons8 • Emojis from Twemoji by Twitter under CC by 4.0