Activity
Below is a chronological chart of the average difficulty of each solved problem (oldest on the left side):News
December 31, 2017
solved and published 577December 27, 2017
solved and published 279December 22, 2017
changed 412: solve grids up to 6x6December 20, 2017
solved and published 324December 18, 2017
solved and published 458December 14, 2017
changed 612: solve up to 10^8December 12, 2017
solved and published 310December 11, 2017
solved and published 308December 10, 2017
solved and published 565December 8, 2017
solved and published 485December 6, 2017
solved and published 375December 4, 2017
solved and published 615November 21, 2017
solved and published 613November 15, 2017
solved and published 516November 14, 2017
solved and published 290November 12, 2017
solved and published 248November 11, 2017
solved and published 208November 10, 2017
changed 118: fixed bug which prevented me from getting 100% on Hackerrank (line 114, thx to Kevin McShane)November 3, 2017
solved and published 386November 2, 2017
changed 436: wrote Monte-Carlo simulationNovember 1, 2017
solved and published 216October 27, 2017
solved and published 327October 26, 2017
solved and published 358October 25, 2017
changed 539: solve up to 10^9October 23, 2017
solved and published 587October 19, 2017
solved and published 288October 18, 2017
solved and published 607October 17, 2017
solved and published 237October 13, 2017
solved and published 284October 12, 2017
solved and published 581October 11, 2017
solved and published 563October 10, 2017
solved and published 601, 611October 9, 2017
solved and published 610October 6, 2017
solved and published 156October 5, 2017
solved and published 411October 4, 2017
solved and published 418October 1, 2017
solved and published 455September 30, 2017
solved and published 473September 29, 2017
solved and published 343changed 291: OpenMP support
September 28, 2017
solved and published 461September 27, 2017
solved and published 268September 26, 2017
solved and published 351September 25, 2017
solved and published 244September 23, 2017
solved and published 393September 22, 2017
solved and published 571September 21, 2017
solved and published 371September 20, 2017
solved and published 333September 19, 2017
solved and published 313September 18, 2017
solved and published 226September 17, 2017
solved and published 152September 16, 2017
solved and published 306September 15, 2017
solved and published 155September 14, 2017
solved and published 273September 13, 2017
solved and published 429September 12, 2017
solved and published 209September 11, 2017
solved and published 500September 10, 2017
solved and published 199September 9, 2017
solved and published 239September 8, 2017
solved and published 510September 7, 2017
solved and published 363September 6, 2017
solved and published 359September 5, 2017
solved and published 189September 4, 2017
solved and published 523September 3, 2017
solved and published 182September 2, 2017
solved and published 518September 1, 2017
solved and published 141August 31, 2017
solved and published 407August 30, 2017
solved and published 321August 29, 2017
solved and published 287August 28, 2017
solved and published 218August 27, 2017
solved and published 300August 26, 2017
solved and published 200August 25, 2017
solved and published 280August 24, 2017
solved and published 227August 23, 2017
solved and published 274August 22, 2017
solved and published 401August 21, 2017
solved and published 493August 20, 2017
solved and published 381August 19, 2017
solved and published 196August 18, 2017
solved and published 126changed 186: modified to solve Hackerrank, too
changed 187: modified to solve Hackerrank, too
August 17, 2017
solved and published 501August 16, 2017
solved and published 491August 15, 2017
solved and published 341August 14, 2017
solved and published 247August 13, 2017
solved and published 329August 12, 2017
solved and published 307August 11, 2017
solved and published 504August 10, 2017
solved and published 549August 9, 2017
solved and published 147August 8, 2017
solved and published 106changed 185: modified to solve Hackerrank, too
August 7, 2017
solved and published 304August 6, 2017
solved and published 425August 5, 2017
solved and published 234August 4, 2017
solved and published 260August 3, 2017
solved and published 168August 2, 2017
solved and published 387August 1, 2017
solved and published 137July 31, 2017
solved and published 323July 30, 2017
solved and published 219July 29, 2017
solved and published 315July 28, 2017
solved and published 110changed 181: modified to solve Hackerrank, too
changed 183: modified to solve Hackerrank, too
July 27, 2017
solved and published 309July 26, 2017
solved and published 293July 25, 2017
solved and published 297July 24, 2017
solved and published 222July 23, 2017
solved and published 348July 22, 2017
solved and published 215July 21, 2017
solved and published 232July 20, 2017
solved and published 240July 19, 2017
solved and published 349July 18, 2017
solved and published 345July 17, 2017
solved and published 130, 347July 15, 2017
solved and published 336July 14, 2017
solved and published 249, 250July 13, 2017
solved and published 154, 160July 12, 2017
solved and published 148, 230July 11, 2017
solved and published 267, 277, 278July 10, 2017
solved and published 138July 9, 2017
solved and published 346July 8, 2017
solved and published 357July 7, 2017
solved and published 163, 171, 291July 6, 2017
solved and published 286July 5, 2017
solved and published 150, 213, 317July 4, 2017
solved and published 186, 259, 301July 3, 2017
solved and published 266, 303July 2, 2017
solved and published 201, 235July 1, 2017
solved and published 265June 30, 2017
solved and published 144June 29, 2017
solved and published 161June 28, 2017
solved and published 178, 181, 231June 27, 2017
solved and published 131, 142, 190June 26, 2017
solved and published 127changed 179: solve Hackerrank problem, too
June 24, 2017
solved and published 128June 23, 2017
solved and published 225June 22, 2017
solved and published 159June 21, 2017
solved and published 229June 20, 2017
solved and published 165, 214June 19, 2017
solved and published 170, 243June 16, 2017
solved and published 146, 164June 15, 2017
solved and published 172, 193June 14, 2017
solved and published 166, 188June 13, 2017
solved and published 158, 183, 197June 2, 2017
solved and published 133June 1, 2017
solved and published 132, 139May 31, 2017
solved and published 203, 207, 211May 30, 2017
solved and published 169, 185May 27, 2017
solved and published 204May 26, 2017
solved and published 205, 206May 25, 2017
solved and published 149, 162, 191May 24, 2017
solved and published 123, 134published 120
May 23, 2017
solved and published 101, 145, 151, 174, 187May 22, 2017
solved and published 173published 113, 124, 129, 135, 136
May 21, 2017
solved 129May 19, 2017
solved and published 121solved 124, 135, 136
May 18, 2017
solved and published 117, 118May 17, 2017
solved and published 109, 111, 125May 16, 2017
solved and published 103, 105, 179published 108
May 15, 2017
solved and published , 122solved 113
May 14, 2017
solved and published 116May 13, 2017
solved and published 114, 115, 119May 12, 2017
solved and published 104solved 108
May 11, 2017
solved and published 102, 107, 112solved 120
May 10, 2017
published 91, 100May 9, 2017
published 80, 84, 86, 90, 98changed 22: read names from STDIN
changed 42: read words from STDIN
changed 59: read numbers from STDIN
May 8, 2017
published 85, 93, 94, 95, 97changed 56: simplified code, it runs much faster now
May 6, 2017
published 89, 92, 96, 99May 5, 2017
published 87, 88May 4, 2017
published 81, 82, 83May 3, 2017
published 66, 73, 75, 78, 79May 2, 2017
published 68, 70, 71, 72, 77April 29, 2017
published 65April 28, 2017
published 51, 61April 27, 2017
published 64, 74, 76April 26, 2017
published 63, 67, 69April 25, 2017
published 60April 24, 2017
published 56, 57, 58April 22, 2017
published 62April 21, 2017
published 54, 55, 59April 20, 2017
published 49, 50, 52, 53April 19, 2017
published 41, 42, 43, 44, 45, 46, 47, 48April 18, 2017
published 33, 39, 40April 12, 2017
published 37, 38April 7, 2017
published 29April 6, 2017
published 28, 30, 31, 32, 34, 35, 36April 5, 2017
published 27April 4, 2017
published 21, 22, 23, 24, 25, 26April 3, 2017
published 17, 18, 19, 20March 31, 2017
published 14, 15, 16March 30, 2017
published 12, 13March 29, 2017
published 8, 9, 10, 11March 28, 2017
published 5, 6, 7March 27, 2017
published 4March 25, 2017
published 3March 24, 2017
published 2March 23, 2017
published 1March 19, 2017
solved 88, 90March 17, 2017
solved 77, 84March 16, 2017
solved 78, 95March 15, 2017
solved 73, 86, 89, 91, 100March 14, 2017
solved 80, 98March 13, 2017
solved 68, 71, 72, 76, 79, 96March 12, 2017
solved 66, 74, 75, 81, 82, 83, 85, 87, 93, 94March 11, 2017
solved 70March 9, 2017
solved 92March 8, 2017
solved 64, 65March 6, 2017
solved 61March 2, 2017
solved 97March 1, 2017
solved 59, 60, 62, 69, 99February 28, 2017
solved 54, 56, 57, 58, 63February 27, 2017
solved 42, 44, 45, 46, 49, 50, 51, 52, 53, 55February 26, 2017
solved 47, 48February 25, 2017
solved 38, 39, 40, 41February 24, 2017
solved 17, 18, 19, 20, 21, 23, 25, 26, 29, 33, 35, 36, 67February 23, 2017
solved 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 22, 24, 27, 28, 30, 31, 32, 34, 37, 43February 22, 2017
solved 1Heatmap
Please click on a problem's number to open my solution to that problem:
| green | solutions solve the original Project Euler problem and have a perfect score of 100% at Hackerrank, too | |
| yellow | solutions score less than 100% at Hackerrank (but still solve the original problem easily) | |
| gray | problems are already solved but I haven't published my solution yet | |
| blue | solutions are relevant for Project Euler only: there wasn't a Hackerrank version of it (at the time I solved it) or it differed too much | |
| orange | problems are solved but exceed the time limit of one minute or the memory limit of 256 MByte | |
| red | problems are not solved yet but I wrote a simulation to approximate the result or verified at least the given example - usually I sketched a few ideas, too | |
| black | problems are solved but access to the solution is blocked for a few days until the next problem is published | |
| [new] | the flashing problem is the one I solved most recently |
I stopped working on Project Euler problems around the time they released 617.
| 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 |
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| 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 |
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| 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 | 498 | 499 | 500 |
| 501 | 502 | 503 | 504 | 505 | 506 | 507 | 508 | 509 | 510 | 511 | 512 | 513 | 514 | 515 | 516 | 517 | 518 | 519 | 520 | 521 | 522 | 523 | 524 | 525 |
| 526 | 527 | 528 | 529 | 530 | 531 | 532 | 533 | 534 | 535 | 536 | 537 | 538 | 539 | 540 | 541 | 542 | 543 | 544 | 545 | 546 | 547 | 548 | 549 | 550 |
| 551 | 552 | 553 | 554 | 555 | 556 | 557 | 558 | 559 | 560 | 561 | 562 | 563 | 564 | 565 | 566 | 567 | 568 | 569 | 570 | 571 | 572 | 573 | 574 | 575 |
| 576 | 577 | 578 | 579 | 580 | 581 | 582 | 583 | 584 | 585 | 586 | 587 | 588 | 589 | 590 | 591 | 592 | 593 | 594 | 595 | 596 | 597 | 598 | 599 | 600 |
| 601 | 602 | 603 | 604 | 605 | 606 | 607 | 608 | 609 | 610 | 611 | 612 | 613 | 614 | 615 | 616 | 617 | 618 | 619 | 620 | 621 | 622 | 623 | 624 | 625 |
| 626 | 627 | 628 | 629 | 630 | 631 | 632 | 633 | 634 | 635 | 636 | 637 | 638 | 639 | 640 | 641 | 642 | 643 | 644 | 645 | 646 | 647 | 648 | 649 | 650 |
| 651 | 652 | 653 | 654 | 655 | 656 | 657 | 658 | 659 | 660 | 661 | 662 | 663 | 664 | 665 | 666 | 667 | 668 | 669 | 670 | 671 | 672 | 673 | 674 | 675 |
| 676 | 677 | 678 | 679 | 680 | 681 | 682 | 683 | 684 | 685 | 686 | 687 | 688 | 689 | 690 | 691 | 692 | 693 | 694 | 695 | 696 | 697 | 698 | 699 | 700 |
| 701 | 702 | 703 | 704 | 705 | 706 | 707 | 708 | 709 | 710 | 711 | 712 | 713 | 714 | 715 | 716 | 717 | 718 | 719 | 720 | 721 | 722 | 723 | 724 | 725 |
| 726 | 727 | 728 | 729 | 730 | 731 | 732 | 733 | 734 | 735 | 736 | 737 | 738 | 739 | 740 | 741 | 742 | 743 | 744 | 745 | 746 | 747 | 748 | 749 | 750 |
| 751 | 752 | 753 | 754 | 755 | 756 | 757 | 758 | 759 | 760 | 761 | 762 | 763 | 764 | 765 | 766 | 767 | 768 | 769 | 770 | 771 | 772 | 773 | 774 | 775 |
| 776 | 777 | 778 | 779 | 780 | 781 | 782 | 783 | 784 | 785 | 786 | 787 | 788 | 789 | 790 | 791 | 792 | 793 | 794 | 795 | 796 | 797 | 798 | 799 | 800 |
| 801 | 802 | 803 | 804 | 805 | 806 | 807 | 808 | 809 | 810 | 811 | 812 | 813 | 814 | 815 | 816 | 817 | 818 | 819 |
I scored 13526 points (out of 15700 possible points, top rank was 17 out of ≈60000 in August 2017) at Hackerrank's Project Euler+.
My username at Project Euler is stephanbrumme while it's stbrumme at Hackerrank.
Look at my progress and performance pages to get more details.