News

August 18, 2017

solved and published 126
changed 186: modified to solve Hackerrank, too
changed 187: modified to solve Hackerrank, too

August 17, 2017

solved and published 501

August 16, 2017

solved and published 491

August 15, 2017

solved and published 341

August 14, 2017

solved and published 247

August 13, 2017

solved and published 329

August 12, 2017

solved and published 307

August 11, 2017

solved and published 504

August 10, 2017

solved and published 549

August 9, 2017

solved and published 147

August 8, 2017

solved and published 106
changed 185: modified to solve Hackerrank, too

August 7, 2017

solved and published 304

August 6, 2017

solved and published 425

August 5, 2017

solved and published 234

August 4, 2017

solved and published 260

August 3, 2017

solved and published 168

August 2, 2017

solved and published 387

August 1, 2017

solved and published 137

July 31, 2017

solved and published 323

July 30, 2017

solved and published 219

July 29, 2017

solved and published 315

July 28, 2017

solved and published 110
changed 181: modified to solve Hackerrank, too
changed 183: modified to solve Hackerrank, too

July 27, 2017

solved and published 309

July 26, 2017

solved and published 293

July 25, 2017

solved and published 297

July 24, 2017

solved and published 222

July 23, 2017

solved and published 348

July 22, 2017

solved and published 215

July 21, 2017

solved and published 232

July 20, 2017

solved and published 240

July 19, 2017

solved and published 349

July 18, 2017

solved and published 345

July 17, 2017

solved and published 130, 347

July 15, 2017

solved and published 336

July 14, 2017

solved and published 249, 250

July 13, 2017

solved and published 154, 160

July 12, 2017

solved and published 148, 230

July 11, 2017

solved and published 267, 277, 278

July 10, 2017

solved and published 138

July 9, 2017

solved and published 346

July 8, 2017

solved and published 357

July 7, 2017

solved and published 163, 171, 291

July 6, 2017

solved and published 286

July 5, 2017

solved and published 150, 213, 317

July 4, 2017

solved and published 186, 259, 301

July 3, 2017

solved and published 266, 303

July 2, 2017

solved and published 201, 235

July 1, 2017

solved and published 265

June 30, 2017

solved and published 144

June 29, 2017

solved and published 161

June 28, 2017

solved and published 178, 181, 231

June 27, 2017

solved and published 131, 142, 190

June 26, 2017

solved and published 127
changed 179: solve Hackerrank problem, too

June 24, 2017

solved and published 128

June 23, 2017

solved and published 225

June 22, 2017

solved and published 159

June 21, 2017

solved and published 229

June 20, 2017

solved and published 165, 214

June 19, 2017

solved and published 170, 243

June 16, 2017

solved and published 146, 164

June 15, 2017

solved and published 172, 193

June 14, 2017

solved and published 166, 188

June 13, 2017

solved and published 158, 183, 197

June 2, 2017

solved and published 133

June 1, 2017

solved and published 132, 139

May 31, 2017

solved and published 203, 207, 211

May 30, 2017

solved and published 169, 185

May 27, 2017

solved and published 204

May 26, 2017

solved and published 205, 206

May 25, 2017

solved and published 149, 162, 191

May 24, 2017

solved and published 123, 134
published 120

May 23, 2017

solved and published 101, 145, 151, 174, 187

May 22, 2017

solved and published 173
published 113, 124, 129, 135, 136

May 21, 2017

solved 129

May 19, 2017

solved and published 121
solved 124, 135, 136

May 18, 2017

solved and published 117, 118

May 17, 2017

solved and published 109, 111, 125

May 16, 2017

solved and published 103, 105, 179
published 108

May 15, 2017

solved and published , 122
solved 113

May 14, 2017

solved and published 116

May 13, 2017

solved and published 114, 115, 119

May 12, 2017

solved and published 104
solved 108

May 11, 2017

solved and published 102, 107, 112
solved 120

May 10, 2017

published 91, 100

May 9, 2017

published 80, 84, 86, 90, 98
changed 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, 97
changed 56: simplified code, it runs much faster now

May 6, 2017

published 89, 92, 96, 99

May 5, 2017

published 87, 88

May 4, 2017

published 81, 82, 83

May 3, 2017

published 66, 73, 75, 78, 79

May 2, 2017

published 68, 70, 71, 72, 77

April 29, 2017

published 65

April 28, 2017

published 51, 61

April 27, 2017

published 64, 74, 76

April 26, 2017

published 63, 67, 69

April 25, 2017

published 60

April 24, 2017

published 56, 57, 58

April 22, 2017

published 62

April 21, 2017

published 54, 55, 59

April 20, 2017

published 49, 50, 52, 53

April 19, 2017

published 41, 42, 43, 44, 45, 46, 47, 48

April 18, 2017

published 33, 39, 40

April 12, 2017

published 37, 38

April 7, 2017

published 29

April 6, 2017

published 28, 30, 31, 32, 34, 35, 36

April 5, 2017

published 27

April 4, 2017

published 21, 22, 23, 24, 25, 26

April 3, 2017

published 17, 18, 19, 20

March 31, 2017

published 14, 15, 16

March 30, 2017

published 12, 13

March 29, 2017

published 8, 9, 10, 11

March 28, 2017

published 5, 6, 7

March 27, 2017

published 4

March 25, 2017

published 3

March 24, 2017

published 2

March 23, 2017

published 1

March 19, 2017

solved 88, 90

March 17, 2017

solved 77, 84

March 16, 2017

solved 78, 95

March 15, 2017

solved 73, 86, 89, 91, 100

March 14, 2017

solved 80, 98

March 13, 2017

solved 68, 71, 72, 76, 79, 96

March 12, 2017

solved 66, 74, 75, 81, 82, 83, 85, 87, 93, 94

March 11, 2017

solved 70

March 9, 2017

solved 92

March 8, 2017

solved 64, 65

March 6, 2017

solved 61

March 2, 2017

solved 97

March 1, 2017

solved 59, 60, 62, 69, 99

February 28, 2017

solved 54, 56, 57, 58, 63

February 27, 2017

solved 42, 44, 45, 46, 49, 50, 51, 52, 53, 55

February 26, 2017

solved 47, 48

February 25, 2017

solved 38, 39, 40, 41

February 24, 2017

solved 17, 18, 19, 20, 21, 23, 25, 26, 29, 33, 35, 36, 67

February 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, 43

February 22, 2017

solved 1

Heatmap

green problems solve the original Project Euler problem and have a perfect score of 100% at Hackerrank, too.
yellow problems score less than 100% at Hackerrank (but still solve the original problem).
gray problems are already solved but I haven't published my solution yet.
blue problems are solved and there wasn't a Hackerrank version of it at the time I solved it or I didn't care about it because it differed too much.
red problems are solved but exceed the time limit of one minute or the memory limit of 256 MByte.

Please click on a problem's number to open my solution to that problem:

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
476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500
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
The 235 solved problems (level 9) had an average difficulty of 29.1% at Project Euler and
I scored 13,183 points (out of 15300 possible points, top rank was 17 out of ≈60000 in August 2017) at Hackerrank's Project Euler+.
Look at my progress and performance pages to get more details.

My username at Project Euler is stephanbrumme while it's stbrumme at Hackerrank.

more about me can be found on my homepage, especially in my coding blog.
some names mentioned on this site may be trademarks of their respective owners.
thanks to the KaTeX team for their great typesetting library !