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)
4321 Codeforces 1006B: Polycarp's Practice
4320 Codeforces 1006A: Adjacent Replacements
4319 Codeforces 1005F: Berland and the Shortest Paths
4318 Codeforces 1005E2: Median on Segments (General Case Edition)
4317 Codeforces 1005E1: Median on Segments (Permutations Edition)
4316 Codeforces 1005D: Polycarp and Div 3
4315 Codeforces 1005C: Summarize to the Power of Two
4314 Codeforces 1005B: Delete from the Left
4313 Codeforces 1005A: Tanya and Stairways
4312 Codeforces 1004F: Sonya and Bitwise OR
4311 Codeforces 1004E: Sonya and Ice Cream
4310 Codeforces 1004D: Sonya and Matrix
4309 Codeforces 1004C: Sonya and Robots
4308 Codeforces 1004B: Sonya and Exhibition
4307 Codeforces 1004A: Sonya and Hotels
4306 Codeforces 1003F: Abbreviation
4305 Codeforces 1003E: Tree Constructing
4304 Codeforces 1003D: Coins and Queries
4303 Codeforces 1003C: Intense Heat
4302 Codeforces 1003B: Binary String Constructing
4301 Codeforces 1003A: Polycarp's Pockets
4300 Codeforces 1002E2: Another array reconstruction algorithm
4299 Codeforces 1002E1: Bernstein-Vazirani algorithm
4298 Codeforces 1002D3: Oracle for majority function
4297 Codeforces 1002D2: Oracle for f(x) = b * x + (1 - b) * (1 - x) mod 2
4296 Codeforces 1002D1: Oracle for f(x) = b * x mod 2
4295 Codeforces 1002C2: Distinguish zero state and plus state without errors
4294 Codeforces 1002C1: Distinguish zero state and plus state with minimum error
4293 Codeforces 1002B4: Distinguish four 2-qubit states - 2
4292 Codeforces 1002B3: Distinguish four 2-qubit states
4291 Codeforces 1002B2: Distinguish GHZ state and W state
4290 Codeforces 1002B1: Distinguish zero state and W state
4289 Codeforces 1002A4: Generate W state
4288 Codeforces 1002A3: Generate superposition of two basis states
4287 Codeforces 1002A2: Generate superposition of zero state and a basis state
4286 Codeforces 1002A1: Generate superposition of all basis states
4285 Codeforces 1001I: Deutsch-Jozsa algorithm
4284 Codeforces 1001H: Oracle for f(x) = parity of the number of 1s in x
4283 Codeforces 1001G: Oracle for f(x) = k-th element of x
4282 Codeforces 1001F: Distinguish multi-qubit basis states
4281 Codeforces 1001E: Distinguish Bell states
4280 Codeforces 1001D: Distinguish plus state and minus state
4279 Codeforces 1001C: Generate GHZ state
4278 Codeforces 1001B: Generate Bell state
4277 Codeforces 1001A: Generate plus state or minus state
4276 Codeforces 1000G: Two-Paths
4275 Codeforces 1000F: One Occurrence
4274 Codeforces 1000E: We Need More Bosses
4273 Codeforces 1000D: Yet Another Problem On a Subsequence
4272 Codeforces 1000C: Covered Points Count
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