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Day 1 solved

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Joshua Seigler 2020-12-02 15:27:27 +00:00
parent f3d555f01c
commit 93aea4f013
5 changed files with 291 additions and 1 deletions
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.replit Normal file
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language = "nodejs"
run = "npm start"

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solutions/day1/input.txt Normal file
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1865
1179
1328
1390
322
1999
1713
1808
1380
1727
1702
1304
1481
1334
1728
1953
1413
1753
1723
1379
1532
1918
1490
71
1388
1519
807
1427
1729
1952
970
1405
1500
1782
1899
1501
1720
1832
1706
1658
1333
486
1670
1674
1290
1893
1382
1761
1945
1607
1319
1508
1464
1733
1917
1483
1620
1677
1835
1810
1385
1840
1705
1994
1695
1599
1681
1566
1153
1672
1373
1679
1714
1283
1950
1197
1696
1936
1218
1910
1786
958
1565
1583
1914
1853
1682
1267
1543
1322
1965
1406
860
1754
1867
1393
1404
1191
1861
2007
1613
1938
1340
1227
1628
1826
1638
1970
1993
1748
496
1661
1736
1593
1298
1882
1763
1616
1848
92
1338
1707
1587
1996
1708
700
1460
1673
1450
1815
1537
1825
1683
1743
1949
1933
1289
1905
1307
1845
1855
1955
1554
1570
1931
1780
1929
1980
1978
1998
1371
1981
1817
1722
1545
1561
1352
1935
1553
1796
1847
1640
1414
1198
1669
1909
1879
1744
1783
1367
1632
1990
1937
1919
1431
2002
1603
1948
1317
1282
1349
1839
1575
1730
1849
1959
1971
2009
1641
1402
1924
1757
1605
1693
1762
283
1525
1964
1715
1602

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solutions/day1/solution.js Normal file
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const path = require('path')
const { read, position } = require('promise-path')
const fromHere = position(__dirname)
const report = (...messages) => console.log(`[${require(fromHere('../../package.json')).logName} / ${__dirname.split(path.sep).pop()}]`, ...messages)
async function run () {
const input = (await read(fromHere('input.txt'), 'utf8')).trim().split('\n').map(x => parseInt(x, 10))
await solveForFirstStar(input)
await solveForSecondStar(input)
}
function findSum (array, startIndex, sum, count = 2) {
for (let i = 0; i < array.length; i++) {
const n = array[i]
if (count > 2) {
const searchResult = findSum(array, i + 1, sum - n, count - 1)
if (searchResult) {
return [n, ...searchResult]
}
} else if (count === 2) {
for (let j = startIndex + 1; j < array.length; j++) {
if (n + array[j] === sum) {
return [n, array[j]]
}
}
} else {
throw new Error('findSum: Invalid count')
}
}
return null
}
async function solveForFirstStar (input) {
const solution = findSum(input, 0, 2020, 2).reduce((acc, cur) => acc * cur, 1)
report('Input:', input)
report('Solution 1:', solution)
}
async function solveForSecondStar (input) {
const solution = findSum(input, 0, 2020, 3).reduce((acc, cur) => acc * cur, 1)
report('Solution 2:', solution)
}
run()

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solutions/day1/viewer.html Normal file
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<!DOCTYPE html>
<html>
<head>
<title>Solution Viewer</title>
<style>
html, body { font-family: sans-serif; }
pre { border-radius: 0.5em; padding: 0.5em; background: #eee; }
</style>
<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
</head>
<body>
<div id="viewer">
<h1>Solution Viewer ({{ solutionTitle }})</h1>
<p>For interesting problems; this page can be used as a dynamic viewer.</p>
<h3><a href="./input.txt">input.txt</a></h3>
<pre><code>{{ inputText }}</code></pre>
<h3><a href="./solution.js">solution.js</a></h3>
<pre><code>{{ solutionText }}</code></pre>
</div>
<script>
const app = new Vue({
el: '#viewer',
data: () => {
return {
solutionText: '[Loading]',
inputText: '[Loading]'
}
},
computed: {
solutionTitle() {
const parts = (document.location + '').split('/')
return parts.reverse()[1]
}
},
async mounted () {
this.solutionText = (await axios.get('./solution.js')).data
this.inputText = (await axios.get('./input.txt')).data
}
})
</script>
</body>
</html>

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solutions/template/solution.js
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async function solveForFirstStar (input) { async function solveForFirstStar (input) {
const solution = 'UNSOLVED' const solution = 'UNSOLVED'
report('Input:', input) // report('Input:', input);
report('Solution 1:', solution) report('Solution 1:', solution)
} }