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fix(seed): Add tests, solution, and edit description for Project Euler 16 (#16641) 

Edited the description so the exponents are displayed properly, and
added more tests and a solution.

Amend: Edited the seed so that the challenge function in the seed is called only once.

BREAKING CHANGE: None
pull/18182/head
Kristofer Koishigawa 2018-02-15 18:06:41 +09:00 committed by Stuart Taylor
parent 4a3d1c9dce
commit 5d14e4bdd5
1 changed files with 8 additions and 6 deletions
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14
challenges/08-coding-interview-questions-and-take-home-assignments/project-euler-problems.json
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@ -721,21 +721,23 @@
"type": "bonfire",
"title": "Problem 16: Power digit sum",
"tests": [
"assert.strictEqual(euler16(), 1366, 'message: <code>euler16()</code> should return 1366.');"
"assert.strictEqual(powerDigitSum(15), 26, 'message: <code>powerDigitSum(15)</code> should return 26.');",
"assert.strictEqual(powerDigitSum(128), 166, 'message: <code>powerDigitSum(128)</code> should return 166.');",
"assert.strictEqual(powerDigitSum(1000), 1366, 'message: <code>powerDigitSum(1000)</code> should return 1366.');"
],
"solutions": [],
"solutions": ["function powerDigitSum(exponent) {\n const bigNum = [1];\n let sum = 0;\n\n for (let i = 1; i <= exponent; i++) {\n let count = bigNum.length + 1;\n let overflow = 0;\n for (let j = 0; j < count; j++) {\n let digit = bigNum[j] || 0;\n digit = 2 * digit + overflow;\n\n if (digit > 9) {\n digit -= 10;\n overflow = 1;\n } else {\n overflow = 0;\n }\n\n bigNum[j] = digit;\n }\n }\n\n bigNum.forEach(function(num) {\n return sum += num;\n });\n\n return sum;\n}"],
"translations": {},
"challengeSeed": [
"function euler16() {",
"function powerDigitSum(exponent) {",
" // Good luck!",
" return true;",
"}",
"",
"euler16();"
"powerDigitSum(15);"
],
"description": [
"215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.",
"What is the sum of the digits of the number 21000?"
"2¹⁵ = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.",
"What is the sum of the digits of the number 2¹⁰⁰⁰?"
]
},
{