Project Eulerの問題の難易度としては解いた人の数が使われますが、これよりも最初のほうの人が解くまでにかかった時間のほうが実態に合っていると思います。ここでは、Problem304〜422の50人解けるまで時間を調べてみました。特に上のほうは100番台レベルではないかと思うので、中級以上の人は解いてみましょう。
| 問題 | 50人解けるまでの時間 |
|---|---|
| 357 | 48 minutes, 30 seconds |
| 387 | 1 hour, 8 minutes, 45 seconds |
| 381 | 1 hour, 18 minutes, 23 seconds |
| 346 | 1 hour, 25 minutes, 50 seconds |
| 345 | 1 hour, 37 minutes, 26 seconds |
| 347 | 2 hours, 7 minutes, 19 seconds |
| 315 | 2 hours, 15 minutes, 9 seconds |
| 323 | 2 hours, 29 minutes, 30 seconds |
| 407 | 2 hours, 55 minutes, 27 seconds |
| 359 | 3 hours, 5 minutes, 38 seconds |
| 358 | 3 hours, 27 minutes, 16 seconds |
| 336 | 3 hours, 52 minutes, 14 seconds |
| 348 | 4 hours, 1 minute, 59 seconds |
| 401 | 4 hours, 32 minutes, 29 seconds |
| 351 | 4 hours, 48 minutes, 4 seconds |
| 329 | 4 hours, 49 minutes, 28 seconds |
| 371 | 4 hours, 58 minutes, 32 seconds |
| 313 | 5 hours, 33 minutes, 10 seconds |
| 340 | 6 hours, 29 minutes, 55 seconds |
| 321 | 6 hours, 48 minutes, 28 seconds |
| 389 | 7 hours, 11 minutes, 28 seconds |
| 349 | 7 hours, 17 minutes, 31 seconds |
| 343 | 7 hours, 35 minutes, 50 seconds |
| 304 | 7 hours, 49 minutes, 55 seconds |
| 363 | 7 hours, 57 minutes, 47 seconds |
| 317 | 8 hours, 35 minutes, 40 seconds |
| 417 | 8 hours, 38 minutes, 8 seconds |
| 333 | 9 hours, 9 minutes, 46 seconds |
| 307 | 9 hours, 46 minutes, 25 seconds |
| 405 | 9 hours, 53 minutes, 49 seconds |
| 392 | 10 hours, 4 minutes, 8 seconds |
| 365 | 10 hours, 4 minutes, 50 seconds |
| 396 | 10 hours, 58 minutes, 48 seconds |
| 378 | 10 hours, 58 minutes, 56 seconds |
| 327 | 12 hours, 43 minutes, 42 seconds |
| 375 | 13 hours, 28 minutes, 52 seconds |
| 310 | 14 hours, 16 minutes, 56 seconds |
| 374 | 14 hours, 36 minutes, 26 seconds |
| 386 | 15 hours, 5 minutes, 35 seconds |
| 366 | 15 hours, 6 minutes, 52 seconds |
| 418 | 15 hours, 22 minutes, 36 seconds |
| 324 | 15 hours, 24 minutes, 16 seconds |
| 399 | 15 hours, 40 minutes, 22 seconds |
| 419 | 17 hours, 6 minutes, 34 seconds |
| 368 | 17 hours, 12 minutes, 51 seconds |
| 412 | 17 hours, 40 minutes, 38 seconds |
| 408 | 18 hours, 32 minutes, 49 seconds |
| 377 | 19 hours, 20 minutes, 55 seconds |
| 312 | 22 hours, 26 minutes, 5 seconds |
| 414 | 23 hours, 3 minutes, 39 seconds |
| 318 | 23 hours, 22 minutes, 42 seconds |
| 341 | 23 hours, 47 minutes, 40 seconds |
| 383 | 1 day, 3 minutes, 24 seconds |
| 409 | 1 day, 52 minutes, 48 seconds |
| 309 | 1 day, 2 hours, 6 minutes, 5 seconds |
| 364 | 1 day, 2 hours, 31 minutes, 4 seconds |
| 320 | 1 day, 2 hours, 47 minutes, 12 seconds |
| 411 | 1 day, 2 hours, 47 minutes, 29 seconds |
| 360 | 1 day, 3 hours, 18 minutes, 52 seconds |
| 393 | 1 day, 6 hours, 8 minutes, 5 seconds |
| 332 | 1 day, 6 hours, 49 minutes, 42 seconds |
| 326 | 1 day, 7 hours, 5 minutes, 54 seconds |
| 316 | 1 day, 8 hours, 55 minutes, 28 seconds |
| 400 | 1 day, 9 hours, 57 minutes, 30 seconds |
| 406 | 1 day, 10 hours, 6 minutes, 4 seconds |
| 353 | 1 day, 10 hours, 8 minutes, 7 seconds |
| 422 | 1 day, 10 hours, 54 minutes, 5 seconds |
| 421 | 1 day, 11 hours, 29 minutes, 36 seconds |
| 342 | 1 day, 11 hours, 38 minutes, 18 seconds |
| 388 | 1 day, 11 hours, 42 minutes, 21 seconds |
| 306 | 1 day, 12 hours, 58 minutes, 58 seconds |
| 394 | 1 day, 14 hours, 49 minutes, 20 seconds |
| 394 | 1 day, 14 hours, 49 minutes, 20 seconds |
| 403 | 1 day, 15 hours, 33 minutes, 7 seconds |
| 352 | 1 day, 16 hours, 48 minutes, 21 seconds |
| 402 | 1 day, 19 hours, 36 minutes, 40 seconds |
| 398 | 1 day, 22 hours, 53 minutes, 37 seconds |
| 305 | 1 day, 23 hours, 55 minutes, 28 seconds |
| 420 | 2 days, 2 hours, 27 seconds |
| 367 | 2 days, 2 hours, 43 minutes, 57 seconds |
| 413 | 2 days, 6 hours, 19 minutes, 4 seconds |
| 369 | 2 days, 9 hours, 18 minutes, 45 seconds |
| 372 | 2 days, 11 hours, 28 minutes, 54 seconds |
| 308 | 2 days, 12 hours, 3 minutes, 41 seconds |
| 390 | 2 days, 15 hours, 22 minutes, 39 seconds |
| 380 | 2 days, 17 hours, 32 minutes, 9 seconds |
| 410 | 2 days, 19 hours, 1 minute, 52 seconds |
| 350 | 2 days, 19 hours, 5 minutes, 27 seconds |
| 382 | 2 days, 20 hours, 8 minutes, 52 seconds |
| 370 | 2 days, 22 hours, 30 minutes, 41 seconds |
| 404 | 2 days, 22 hours, 55 minutes, 29 seconds |
| 356 | 3 days, 4 hours, 46 seconds |
| 416 | 3 days, 12 hours, 23 minutes, 14 seconds |
| 334 | 3 days, 12 hours, 42 minutes, 41 seconds |
| 354 | 4 days, 46 minutes |
| 335 | 4 days, 5 hours, 5 minutes, 19 seconds |
| 330 | 4 days, 6 hours, 42 minutes, 3 seconds |
| 385 | 4 days, 8 hours, 43 minutes, 42 seconds |
| 384 | 4 days, 23 hours, 42 minutes, 46 seconds |
| 322 | 5 days, 2 hours, 12 minutes, 23 seconds |
| 379 | 5 days, 5 hours, 33 minutes, 6 seconds |
| 397 | 5 days, 11 hours, 50 minutes, 50 seconds |
| 355 | 5 days, 12 hours, 41 minutes, 55 seconds |
| 376 | 5 days, 20 hours, 44 minutes, 6 seconds |
| 339 | 6 days, 12 hours, 49 minutes, 5 seconds |
| 337 | 6 days, 16 hours, 58 minutes, 47 seconds |
| 362 | 6 days, 19 hours, 15 minutes, 17 seconds |
| 311 | 8 days, 8 hours, 18 minutes, 28 seconds |
| 373 | 8 days, 8 hours, 55 minutes, 12 seconds |
| 314 | 8 days, 10 hours, 22 minutes, 3 seconds |
| 325 | 8 days, 10 hours, 28 minutes, 8 seconds |
| 391 | 9 days, 14 hours, 10 minutes, 22 seconds |
| 319 | 22 days, 7 hours, 47 minutes, 47 seconds |
| 328 | 24 days, 9 hours, 54 minutes, 18 seconds |
| 361 | 27 days, 22 hours, 2 minutes, 55 seconds |
| 344 | 50 days, 2 hours, 25 minutes, 44 seconds |
| 415 | 52 days, 5 hours, 18 minutes, 3 seconds |
| 331 | 68 days, 21 hours, 19 minutes, 9 seconds |
| 338 | 74 days, 21 hours, 54 minutes, 26 seconds |
