lots of exercises in java... from https://github.com/exercism/java

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848
  1. {
  2. "active": true,
  3. "blurb": "Java is a very widely used Object Oriented programming language. It's safe, simple to use and portable so that you can \"write once, run anywhere\".",
  4. "exercises": [
  5. {
  6. "core": true,
  7. "difficulty": 1,
  8. "slug": "hello-world",
  9. "topics": [
  10. "strings"
  11. ],
  12. "unlocked_by": null,
  13. "uuid": "f77dc7e3-35a8-4300-a7c8-2c1765e9644d"
  14. },
  15. {
  16. "core": true,
  17. "difficulty": 1,
  18. "slug": "two-fer",
  19. "topics": [
  20. "conditionals",
  21. "strings"
  22. ],
  23. "unlocked_by": null,
  24. "uuid": "74515d45-565b-4be2-96c4-77e58efa9257"
  25. },
  26. {
  27. "core": false,
  28. "difficulty": 2,
  29. "slug": "rna-transcription",
  30. "topics": [
  31. "strings",
  32. "loops",
  33. "maps"
  34. ],
  35. "unlocked_by": null,
  36. "uuid": "8e983ed2-62f7-439a-a144-fb8fdbdf4d30"
  37. },
  38. {
  39. "core": false,
  40. "difficulty": 3,
  41. "slug": "pangram",
  42. "topics": [
  43. "strings",
  44. "pattern_matching",
  45. "regular_expressions"
  46. ],
  47. "unlocked_by": null,
  48. "uuid": "133b0f84-bdc7-4508-a0a1-5732a7db81ef"
  49. },
  50. {
  51. "core": true,
  52. "difficulty": 3,
  53. "slug": "hamming",
  54. "topics": [
  55. "integers",
  56. "loops",
  57. "strings"
  58. ],
  59. "unlocked_by": null,
  60. "uuid": "ce899ca6-9cc7-47ba-b76f-1bbcf2630b76"
  61. },
  62. {
  63. "core": true,
  64. "difficulty": 3,
  65. "slug": "gigasecond",
  66. "topics": [
  67. "dates",
  68. "integers",
  69. "time"
  70. ],
  71. "unlocked_by": null,
  72. "uuid": "bf1641c8-dc0d-4d38-9cfe-b4c132ea3553"
  73. },
  74. {
  75. "core": false,
  76. "difficulty": 3,
  77. "slug": "space-age",
  78. "topics": [
  79. "conditionals",
  80. "floating_point_numbers",
  81. "mathematics"
  82. ],
  83. "unlocked_by": null,
  84. "uuid": "e5b524cd-3a1c-468a-8981-13e8eeccb29d"
  85. },
  86. {
  87. "core": false,
  88. "difficulty": 3,
  89. "slug": "acronym",
  90. "topics": [
  91. "loops",
  92. "strings",
  93. "searching",
  94. "parsing"
  95. ],
  96. "unlocked_by": null,
  97. "uuid": "c31bbc6d-bdcf-44f7-bf35-5f98752e38d0"
  98. },
  99. {
  100. "core": true,
  101. "difficulty": 3,
  102. "slug": "scrabble-score",
  103. "topics": null,
  104. "unlocked_by": null,
  105. "uuid": "afae9f2d-8baf-4bd7-8d7c-d486337f7c97"
  106. },
  107. {
  108. "core": false,
  109. "difficulty": 3,
  110. "slug": "raindrops",
  111. "topics": [
  112. "conditionals",
  113. "integers",
  114. "mathematics",
  115. "strings"
  116. ],
  117. "unlocked_by": "hello-world",
  118. "uuid": "d916e4f8-fda1-41c0-ab24-79e8fc3f1272"
  119. },
  120. {
  121. "core": true,
  122. "difficulty": 3,
  123. "slug": "difference-of-squares",
  124. "topics": [
  125. "loops",
  126. "integers",
  127. "mathematics"
  128. ],
  129. "unlocked_by": null,
  130. "uuid": "b0da59c6-1b55-405c-b163-007ebf09f5e8"
  131. },
  132. {
  133. "core": true,
  134. "difficulty": 3,
  135. "slug": "secret-handshake",
  136. "topics": null,
  137. "unlocked_by": null,
  138. "uuid": "71c7c174-7e2c-43c2-bdd6-7515fcb12a91"
  139. },
  140. {
  141. "core": false,
  142. "difficulty": 3,
  143. "slug": "perfect-numbers",
  144. "topics": null,
  145. "unlocked_by": "difference-of-squares",
  146. "uuid": "d0dcc898-ec38-4822-9e3c-1a1829c9b2d9"
  147. },
  148. {
  149. "core": false,
  150. "difficulty": 4,
  151. "slug": "sum-of-multiples",
  152. "topics": null,
  153. "unlocked_by": "difference-of-squares",
  154. "uuid": "2f244afc-3e7b-4f89-92af-e2b427f4ef35"
  155. },
  156. {
  157. "core": false,
  158. "difficulty": 4,
  159. "slug": "luhn",
  160. "topics": [
  161. "algorithms",
  162. "booleans",
  163. "loops",
  164. "mathematics",
  165. "strings",
  166. "type_conversion"
  167. ],
  168. "unlocked_by": "hamming",
  169. "uuid": "5227a76c-8ecb-4e5f-b023-6af65a057c41"
  170. },
  171. {
  172. "core": true,
  173. "difficulty": 4,
  174. "slug": "matrix",
  175. "topics": null,
  176. "unlocked_by": null,
  177. "uuid": "c1d4e0b4-6a0f-4be9-8222-345966621f53"
  178. },
  179. {
  180. "core": true,
  181. "difficulty": 4,
  182. "slug": "triangle",
  183. "topics": null,
  184. "unlocked_by": null,
  185. "uuid": "ec268d8e-997b-4553-8c67-8bdfa1ecb888"
  186. },
  187. {
  188. "core": false,
  189. "difficulty": 4,
  190. "slug": "largest-series-product",
  191. "topics": [
  192. "loops",
  193. "type_conversion",
  194. "integers",
  195. "strings",
  196. "mathematics"
  197. ],
  198. "unlocked_by": "hamming",
  199. "uuid": "b7310b6e-435c-4d5f-b2bd-31e586d0f238"
  200. },
  201. {
  202. "core": false,
  203. "difficulty": 4,
  204. "slug": "sieve",
  205. "topics": null,
  206. "unlocked_by": "difference-of-squares",
  207. "uuid": "6791d01f-bae4-4b63-ae76-86529ac49e36"
  208. },
  209. {
  210. "core": false,
  211. "difficulty": 4,
  212. "slug": "twelve-days",
  213. "topics": [
  214. "strings",
  215. "arrays",
  216. "conditionals",
  217. "loops"
  218. ],
  219. "unlocked_by": "two-fer",
  220. "uuid": "581afdbb-dfb6-4dc5-9554-a025b5469a3c"
  221. },
  222. {
  223. "core": true,
  224. "difficulty": 4,
  225. "slug": "rotational-cipher",
  226. "topics": null,
  227. "unlocked_by": null,
  228. "uuid": "9eb41883-55ef-4681-b5ac-5c2259302772"
  229. },
  230. {
  231. "core": false,
  232. "difficulty": 4,
  233. "slug": "kindergarten-garden",
  234. "topics": null,
  235. "unlocked_by": "matrix",
  236. "uuid": "0b92ffee-c092-4ab1-ad78-76c8cf80e1b5"
  237. },
  238. {
  239. "core": false,
  240. "difficulty": 4,
  241. "slug": "collatz-conjecture",
  242. "topics": null,
  243. "unlocked_by": "triangle",
  244. "uuid": "1500d39a-c9d9-4d3a-9e77-fdc1837fc6ad"
  245. },
  246. {
  247. "core": false,
  248. "difficulty": 4,
  249. "slug": "nth-prime",
  250. "topics": null,
  251. "unlocked_by": "triangle",
  252. "uuid": "2c69db99-648d-4bd7-8012-1fbdeff6ca0a"
  253. },
  254. {
  255. "core": true,
  256. "difficulty": 4,
  257. "slug": "saddle-points",
  258. "topics": null,
  259. "unlocked_by": null,
  260. "uuid": "8dfc2f0d-1141-46e9-95e2-6f35ccf6f160"
  261. },
  262. {
  263. "core": false,
  264. "difficulty": 4,
  265. "slug": "diamond",
  266. "topics": [
  267. "strings",
  268. "loops",
  269. "arrays",
  270. "lists",
  271. "text_formatting"
  272. ],
  273. "unlocked_by": "two-fer",
  274. "uuid": "ecbd997b-86f4-4e11-9ff0-706ac2899415"
  275. },
  276. {
  277. "core": false,
  278. "difficulty": 4,
  279. "slug": "isogram",
  280. "topics": [
  281. "conditionals",
  282. "loops",
  283. "parsing",
  284. "strings"
  285. ],
  286. "unlocked_by": "hello-world",
  287. "uuid": "c3e89c7c-3a8a-4ddc-b653-9b0ff9e1d7d8"
  288. },
  289. {
  290. "core": true,
  291. "difficulty": 5,
  292. "slug": "flatten-array",
  293. "topics": null,
  294. "unlocked_by": null,
  295. "uuid": "a732a838-8170-458a-a85e-d6b4c46f97a1"
  296. },
  297. {
  298. "core": false,
  299. "difficulty": 5,
  300. "slug": "pig-latin",
  301. "topics": [
  302. "arrays",
  303. "lists",
  304. "strings",
  305. "transforming"
  306. ],
  307. "unlocked_by": "hello-world",
  308. "uuid": "38bc80ae-d842-4c04-a797-48edf322504d"
  309. },
  310. {
  311. "core": false,
  312. "difficulty": 5,
  313. "slug": "phone-number",
  314. "topics": [
  315. "conditionals",
  316. "pattern_matching",
  317. "strings",
  318. "regular_expressions"
  319. ],
  320. "unlocked_by": "hamming",
  321. "uuid": "5f9139e7-9fbb-496a-a0d7-a946283033de"
  322. },
  323. {
  324. "core": false,
  325. "difficulty": 5,
  326. "slug": "nucleotide-count",
  327. "topics": [
  328. "conditionals",
  329. "exception_handling",
  330. "integers",
  331. "maps",
  332. "parsing",
  333. "searching",
  334. "strings"
  335. ],
  336. "unlocked_by": "hamming",
  337. "uuid": "2d80fdfc-5bd7-4b67-9fbe-8ab820d89051"
  338. },
  339. {
  340. "core": true,
  341. "difficulty": 5,
  342. "slug": "word-count",
  343. "topics": null,
  344. "unlocked_by": null,
  345. "uuid": "3603b770-87a5-4758-91f3-b4d1f9075bc1"
  346. },
  347. {
  348. "core": false,
  349. "difficulty": 5,
  350. "slug": "run-length-encoding",
  351. "topics": null,
  352. "unlocked_by": "rotational-cipher",
  353. "uuid": "4499a3f9-73a7-48bf-8753-d5b6abf588c9"
  354. },
  355. {
  356. "core": true,
  357. "difficulty": 5,
  358. "slug": "robot-name",
  359. "topics": null,
  360. "unlocked_by": null,
  361. "uuid": "d7c2eed9-64c7-4c4a-b45d-c787d460337f"
  362. },
  363. {
  364. "core": false,
  365. "difficulty": 5,
  366. "slug": "prime-factors",
  367. "topics": null,
  368. "unlocked_by": "triangle",
  369. "uuid": "599c08ec-7338-46ed-99f8-a76f78f724e6"
  370. },
  371. {
  372. "core": false,
  373. "difficulty": 5,
  374. "slug": "allergies",
  375. "topics": [
  376. "booleans",
  377. "conditionals",
  378. "enumerations",
  379. "integers",
  380. "lists",
  381. "loops"
  382. ],
  383. "unlocked_by": "gigasecond",
  384. "uuid": "6a617ddb-04e3-451c-bb30-27ccd0be9125"
  385. },
  386. {
  387. "core": false,
  388. "difficulty": 5,
  389. "slug": "bob",
  390. "topics": [
  391. "booleans",
  392. "conditionals",
  393. "strings"
  394. ],
  395. "unlocked_by": "two-fer",
  396. "uuid": "34cd328c-cd96-492b-abd4-2b8716cdcd9a"
  397. },
  398. {
  399. "core": false,
  400. "difficulty": 5,
  401. "slug": "pascals-triangle",
  402. "topics": [
  403. "arrays",
  404. "matrices",
  405. "algorithms",
  406. "mathematics",
  407. "exception_handling",
  408. "integers"
  409. ],
  410. "unlocked_by": "matrix",
  411. "uuid": "d2a76905-1c8c-4b03-b4f7-4fbff19329f3"
  412. },
  413. {
  414. "core": false,
  415. "difficulty": 5,
  416. "slug": "bracket-push",
  417. "topics": null,
  418. "unlocked_by": "flatten-array",
  419. "uuid": "85aa50ac-0141-49eb-bc6f-62f3f7a97647"
  420. },
  421. {
  422. "core": false,
  423. "difficulty": 5,
  424. "slug": "series",
  425. "topics": [
  426. "conditionals",
  427. "lists",
  428. "loops",
  429. "strings",
  430. "type_conversion"
  431. ],
  432. "unlocked_by": "hamming",
  433. "uuid": "af80d7f4-c7d0-4d0b-9c30-09da120f6bb9"
  434. },
  435. {
  436. "core": false,
  437. "difficulty": 5,
  438. "slug": "atbash-cipher",
  439. "topics": null,
  440. "unlocked_by": "rotational-cipher",
  441. "uuid": "d36ce010-210f-4e9a-9d6c-cb933e0a59af"
  442. },
  443. {
  444. "core": false,
  445. "difficulty": 6,
  446. "slug": "spiral-matrix",
  447. "topics": null,
  448. "unlocked_by": "matrix",
  449. "uuid": "163fcc6b-c054-4232-a88b-0aded846a6eb"
  450. },
  451. {
  452. "core": false,
  453. "difficulty": 6,
  454. "slug": "roman-numerals",
  455. "topics": [
  456. "logic",
  457. "mathematics",
  458. "loops",
  459. "integers",
  460. "strings",
  461. "maps"
  462. ],
  463. "unlocked_by": "hamming",
  464. "uuid": "3e728cd4-5e5f-4c69-8a53-bc36d020fcdb"
  465. },
  466. {
  467. "core": false,
  468. "difficulty": 6,
  469. "slug": "transpose",
  470. "topics": null,
  471. "unlocked_by": "matrix",
  472. "uuid": "57b76837-4610-466f-9373-d5c2697625f1"
  473. },
  474. {
  475. "core": false,
  476. "difficulty": 6,
  477. "slug": "house",
  478. "topics": null,
  479. "unlocked_by": "two-fer",
  480. "uuid": "6b51aca3-3451-4a64-ad7b-00b151d7548a"
  481. },
  482. {
  483. "core": false,
  484. "difficulty": 6,
  485. "slug": "food-chain",
  486. "topics": [
  487. "arrays",
  488. "lists",
  489. "strings"
  490. ],
  491. "unlocked_by": "two-fer",
  492. "uuid": "dd3e6fd6-5359-4978-acd7-c39374cead4d"
  493. },
  494. {
  495. "core": false,
  496. "difficulty": 6,
  497. "slug": "beer-song",
  498. "topics": [
  499. "strings",
  500. "loops",
  501. "variables",
  502. "text_formatting",
  503. "conditionals"
  504. ],
  505. "unlocked_by": "two-fer",
  506. "uuid": "56943095-de76-40bf-b42b-fa3e70f8df5e"
  507. },
  508. {
  509. "core": false,
  510. "difficulty": 6,
  511. "slug": "queen-attack",
  512. "topics": [
  513. "arrays",
  514. "matrices",
  515. "conditionals",
  516. "classes",
  517. "games",
  518. "mathematics"
  519. ],
  520. "unlocked_by": "scrabble-score",
  521. "uuid": "5404109e-3ed9-4691-8eaf-af8b36024a44"
  522. },
  523. {
  524. "core": false,
  525. "difficulty": 6,
  526. "slug": "etl",
  527. "topics": null,
  528. "unlocked_by": "word-count",
  529. "uuid": "76d28d97-75d3-47eb-bb77-3d347b76f1b6"
  530. },
  531. {
  532. "core": true,
  533. "difficulty": 6,
  534. "slug": "linked-list",
  535. "topics": null,
  536. "unlocked_by": null,
  537. "uuid": "7ba5084d-3b75-4406-a0d7-87c26387f9c0"
  538. },
  539. {
  540. "core": false,
  541. "difficulty": 6,
  542. "slug": "grade-school",
  543. "topics": null,
  544. "unlocked_by": "word-count",
  545. "uuid": "b4af5da1-601f-4b0f-bfb8-4a381851090c"
  546. },
  547. {
  548. "core": false,
  549. "difficulty": 6,
  550. "slug": "robot-simulator",
  551. "topics": null,
  552. "unlocked_by": "secret-handshake",
  553. "uuid": "993bde9d-7774-4e7a-a381-9eee75f28ecb"
  554. },
  555. {
  556. "core": true,
  557. "difficulty": 6,
  558. "slug": "binary-search",
  559. "topics": null,
  560. "unlocked_by": null,
  561. "uuid": "50136dc3-caf7-4fa1-b7bd-0cba1bea9176"
  562. },
  563. {
  564. "core": false,
  565. "difficulty": 6,
  566. "slug": "minesweeper",
  567. "topics": [
  568. "integers",
  569. "matrices",
  570. "games",
  571. "conditionals",
  572. "strings",
  573. "lists"
  574. ],
  575. "unlocked_by": "scrabble-score",
  576. "uuid": "416a1489-12af-4593-8540-0f55285c96b4"
  577. },
  578. {
  579. "core": false,
  580. "difficulty": 6,
  581. "slug": "wordy",
  582. "topics": [
  583. "strings",
  584. "integers",
  585. "logic",
  586. "parsing",
  587. "pattern_matching",
  588. "regular_expressions",
  589. "transforming",
  590. "exception_handling"
  591. ],
  592. "unlocked_by": "secret-handshake",
  593. "uuid": "3310a3cd-c0cb-45fa-8c51-600178be904a"
  594. },
  595. {
  596. "core": false,
  597. "difficulty": 6,
  598. "slug": "all-your-base",
  599. "topics": null,
  600. "unlocked_by": "saddle-points",
  601. "uuid": "f7c2e4b5-1995-4dfe-b827-c9aff8ac5332"
  602. },
  603. {
  604. "core": true,
  605. "difficulty": 6,
  606. "slug": "bank-account",
  607. "topics": null,
  608. "unlocked_by": null,
  609. "uuid": "a242efc5-159d-492b-861d-12a1459fb334"
  610. },
  611. {
  612. "core": false,
  613. "difficulty": 6,
  614. "slug": "bowling",
  615. "topics": null,
  616. "unlocked_by": "scrabble-score",
  617. "uuid": "4b3f7771-c642-4278-a3d9-2fb958f26361"
  618. },
  619. {
  620. "core": false,
  621. "difficulty": 7,
  622. "slug": "anagram",
  623. "topics": [
  624. "arrays",
  625. "conditionals",
  626. "equality",
  627. "lists",
  628. "loops",
  629. "strings"
  630. ],
  631. "unlocked_by": "hello-world",
  632. "uuid": "fb10dc2f-0ba1-44b6-8365-5e48e86d1283"
  633. },
  634. {
  635. "core": false,
  636. "difficulty": 7,
  637. "slug": "sublist",
  638. "topics": null,
  639. "unlocked_by": "linked-list",
  640. "uuid": "d2aedbd7-092a-43d0-8a5e-ae3ebd5b9c7f"
  641. },
  642. {
  643. "core": false,
  644. "difficulty": 7,
  645. "slug": "word-search",
  646. "topics": [
  647. "strings",
  648. "games",
  649. "logic",
  650. "matrices",
  651. "searching",
  652. "pattern_matching"
  653. ],
  654. "unlocked_by": "scrabble-score",
  655. "uuid": "b53bde52-cb5f-4d43-86ec-18aa509d62f9"
  656. },
  657. {
  658. "core": false,
  659. "difficulty": 7,
  660. "slug": "simple-linked-list",
  661. "topics": null,
  662. "unlocked_by": "linked-list",
  663. "uuid": "e3e5ffe5-cfc1-467e-a28a-da0302130144"
  664. },
  665. {
  666. "core": false,
  667. "difficulty": 7,
  668. "slug": "binary-search-tree",
  669. "topics": null,
  670. "unlocked_by": "binary-search",
  671. "uuid": "0a2d18aa-7b5e-4401-a952-b93d2060694f"
  672. },
  673. {
  674. "core": false,
  675. "difficulty": 7,
  676. "slug": "meetup",
  677. "topics": null,
  678. "unlocked_by": "gigasecond",
  679. "uuid": "602511d5-7e89-4def-b072-4dd311816810"
  680. },
  681. {
  682. "core": false,
  683. "difficulty": 7,
  684. "slug": "crypto-square",
  685. "topics": null,
  686. "unlocked_by": "rotational-cipher",
  687. "uuid": "162bebdc-9bf2-43c0-8460-a91f5fc16147"
  688. },
  689. {
  690. "core": false,
  691. "difficulty": 7,
  692. "slug": "poker",
  693. "topics": [
  694. "games",
  695. "parsing",
  696. "sorting"
  697. ],
  698. "unlocked_by": "scrabble-score",
  699. "uuid": "57eeac00-741c-4843-907a-51f0ac5ea4cb"
  700. },
  701. {
  702. "core": false,
  703. "difficulty": 7,
  704. "slug": "clock",
  705. "topics": null,
  706. "unlocked_by": "saddle-points",
  707. "uuid": "97c8fcd4-85b6-41cb-9de2-b4e1b4951222"
  708. },
  709. {
  710. "core": false,
  711. "difficulty": 8,
  712. "slug": "ocr-numbers",
  713. "topics": null,
  714. "unlocked_by": "robot-name",
  715. "uuid": "5cbc6a67-3a53-4aad-ae68-ff469525437f"
  716. },
  717. {
  718. "core": false,
  719. "difficulty": 8,
  720. "slug": "circular-buffer",
  721. "topics": [
  722. "classes",
  723. "exception_handling",
  724. "queues"
  725. ],
  726. "unlocked_by": "linked-list",
  727. "uuid": "626dc25a-062c-4053-a8c1-788e4dc44ca0"
  728. },
  729. {
  730. "core": false,
  731. "difficulty": 8,
  732. "slug": "rectangles",
  733. "topics": null,
  734. "unlocked_by": "robot-name",
  735. "uuid": "64cda115-919a-4eef-9a45-9ec5d1af98cc"
  736. },
  737. {
  738. "core": false,
  739. "difficulty": 8,
  740. "slug": "book-store",
  741. "topics": null,
  742. "unlocked_by": "flatten-array",
  743. "uuid": "e5f05d00-fe5b-4d78-b2fa-934c1c9afb32"
  744. },
  745. {
  746. "core": false,
  747. "difficulty": 8,
  748. "slug": "simple-cipher",
  749. "topics": null,
  750. "unlocked_by": "rotational-cipher",
  751. "uuid": "f654831f-c34b-44f5-9dd5-054efbb486f2"
  752. },
  753. {
  754. "core": false,
  755. "difficulty": 8,
  756. "slug": "complex-numbers",
  757. "topics": null,
  758. "unlocked_by": "triangle",
  759. "uuid": "52d11278-0d65-4b5b-b387-1374fced3243"
  760. },
  761. {
  762. "core": false,
  763. "difficulty": 8,
  764. "slug": "list-ops",
  765. "topics": null,
  766. "unlocked_by": "linked-list",
  767. "uuid": "a9836565-5c39-4285-b83a-53408be36ccc"
  768. },
  769. {
  770. "core": false,
  771. "difficulty": 8,
  772. "slug": "change",
  773. "topics": null,
  774. "unlocked_by": "flatten-array",
  775. "uuid": "bac1f4bc-eea9-43c1-8e95-097347f5925e"
  776. },
  777. {
  778. "core": false,
  779. "difficulty": 8,
  780. "slug": "palindrome-products",
  781. "topics": null,
  782. "unlocked_by": "saddle-points",
  783. "uuid": "873c05de-b5f5-4c5b-97f0-d1ede8a82832"
  784. },
  785. {
  786. "core": false,
  787. "difficulty": 9,
  788. "slug": "pythagorean-triplet",
  789. "topics": null,
  790. "unlocked_by": "triangle",
  791. "uuid": "88505f95-89e5-4a08-8ed2-208eb818cdf1"
  792. },
  793. {
  794. "core": false,
  795. "difficulty": 9,
  796. "slug": "forth",
  797. "topics": null,
  798. "unlocked_by": "secret-handshake",
  799. "uuid": "f0c0316d-3fb5-455e-952a-91161e7fb298"
  800. },
  801. {
  802. "core": false,
  803. "difficulty": 10,
  804. "slug": "custom-set",
  805. "topics": null,
  806. "unlocked_by": "linked-list",
  807. "uuid": "377fe38b-08ad-4f3a-8118-a43c10f7b9b2"
  808. },
  809. {
  810. "deprecated": true,
  811. "slug": "accumulate",
  812. "uuid": "e58c29d2-80a7-40ef-bed0-4a184ae35f34"
  813. },
  814. {
  815. "deprecated": true,
  816. "slug": "binary",
  817. "uuid": "9ea6e0fa-b91d-4d17-ac8f-6d2dc30fdd44"
  818. },
  819. {
  820. "deprecated": true,
  821. "slug": "hexadecimal",
  822. "uuid": "6fe53a08-c123-465d-864a-ef18217203c4"
  823. },
  824. {
  825. "deprecated": true,
  826. "slug": "octal",
  827. "uuid": "14a29e82-f9b1-4662-b678-06992e306c01"
  828. },
  829. {
  830. "deprecated": true,
  831. "slug": "strain",
  832. "uuid": "2d195cd9-1814-490a-8dd6-a2c676f1d4cd"
  833. },
  834. {
  835. "deprecated": true,
  836. "slug": "trinary",
  837. "uuid": "ee3a8abe-6b19-4b47-9cf6-4d39ae915fb7"
  838. }
  839. ],
  840. "foregone": [
  841. "leap",
  842. "grains",
  843. "say"
  844. ],
  845. "language": "Java",
  846. "solution_pattern": "reference"
  847. }