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)
7771 Codeforces 1677C: Tokitsukaze and Two Colorful Tapes
7770 Codeforces 1677B: Tokitsukaze and Meeting
7769 Codeforces 1677A: Tokitsukaze and Strange Inequality
7768 Codeforces 1676H2: Maximum Crossings (Hard Version)
7767 Codeforces 1676H1: Maximum Crossings (Easy Version)
7766 Codeforces 1676G: White-Black Balanced Subtrees
7765 Codeforces 1676F: Longest Strike
7764 Codeforces 1676E: Eating Queries
7763 Codeforces 1676D: X-Sum
7762 Codeforces 1676C: Most Similar Words
7761 Codeforces 1676B: Equal Candies
7760 Codeforces 1676A: Lucky?
7759 Codeforces 1675G: Sorting Pancakes
7758 Codeforces 1675F: Vlad and Unfinished Business
7757 Codeforces 1675E: Replace With the Previous, Minimize
7756 Codeforces 1675D: Vertical Paths
7755 Codeforces 1675C: Detective Task
7754 Codeforces 1675B: Make It Increasing
7753 Codeforces 1675A: Food for Animals
7752 Codeforces 1674G: Remove Directed Edges
7751 Codeforces 1674F: Desktop Rearrangement
7750 Codeforces 1674E: Breaking the Wall
7749 Codeforces 1674D: A-B-C Sort
7748 Codeforces 1674C: Infinite Replacement
7747 Codeforces 1674B: Dictionary
7746 Codeforces 1674A: Number Transformation
7745 Codeforces 1673F: Anti-Theft Road Planning
7744 Codeforces 1673E: Power or XOR?
7743 Codeforces 1673D: Lost Arithmetic Progression
7742 Codeforces 1673C: Palindrome Basis
7741 Codeforces 1673B: A Perfectly Balanced String?
7740 Codeforces 1673A: Subtle Substring Subtraction
7739 Codeforces 1672I: PermutationForces
7738 Codeforces 1672H: Zigu Zagu
7737 Codeforces 1672G: Cross Xor
7736 Codeforces 1672F2: Checker for Array Shuffling
7735 Codeforces 1672F1: Array Shuffling
7734 Codeforces 1672E: notepad.exe
7733 Codeforces 1672D: Cyclic Rotation
7732 Codeforces 1672C: Unequal Array
7731 Codeforces 1672B: I love AAAB
7730 Codeforces 1672A: Log Chopping
7729 Codeforces 1671F: Permutation Counting
7728 Codeforces 1671E: Preorder
7727 Codeforces 1671D: Insert a Progression
7726 Codeforces 1671C: Dolce Vita
7725 Codeforces 1671B: Consecutive Points Segment
7724 Codeforces 1671A: String Building
7723 Codeforces 1670F: Jee, You See?
7722 Codeforces 1670E: Hemose on the Tree
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