From 97098304db707cc7642f14d5cd09329b6688c157 Mon Sep 17 00:00:00 2001 From: benkyd Date: Sat, 3 Dec 2022 10:05:33 +0000 Subject: [PATCH] day 3 --- 2022/3.input | 300 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2022/3.js | 37 +++++++ 2 files changed, 337 insertions(+) create mode 100644 2022/3.input create mode 100644 2022/3.js diff --git a/2022/3.input b/2022/3.input new file mode 100644 index 0000000..c5edf4a --- /dev/null +++ b/2022/3.input @@ -0,0 +1,300 @@ +DsPhSBQQQhqmBDhPDsFwjwsLjlRjlttvjvvtRb +rNJMNNbrHrtjHLHjvwtg +fNbNzZdrZnMnMPnQShFPDmnqFm +QWVCFfQffgQCVZzVVpHsHJBqtpspJFRHqq +mwDbmnnGNlNcwNDDNRbnNDlJTpBJBtJGtPTLsBGqTqqsqp +MlSdnScRnnmmDjSdNSdCzvggWzrgzjvfvrgVzW +gsMljbrjlZlWcWMJrWwTwbmwQbmmLDQQLhwL +CdgpzdgpgnfThHfFRwhfRf +SptgpSpnCNpVSGNPvPGSddcMWjMrjqBsJcWqMcBWcVlZ +JcJLQQFWhQJPJpWcwjHvMQvnnlMvzBHd +tCtGZrmVRmVGTVTtCfRTCHHNNvdNzmdMvMlNzvwdvw +CTGGRftfSGtGTGDLbFchSgSWWWcM +QcMFQrvrQbvtczbVbjbMzZzRpqmDDmqqnNzCDCDC +SHHfPJssGLPSdHThLhHdRmqNmNssnNmNCNnpjmsn 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fs.readFileSync('3.input').toString().split('\n'); + +const accumilatePriority = (items) => { + let ret = 0; + for (const item of items) { + const char = item.charCodeAt(0); + if (char < 97 || char > 122) { + ret += char - 38; + } else { + ret += char - 96; + } + } + return ret; +} + +const itemDuplicatesPerRucsack = rucsacks.reduce((p, c) => { + const firstPocket = new Set(c.slice(0, c.length / 2)); + const secondPocket = new Set(c.slice(c.length / 2)); + const intersection = Array.from(new Set([...firstPocket].filter(x => secondPocket.has(x)))); + p.push(...intersection); return p; +}, []); + +console.log(`Part 1: ${accumilatePriority(itemDuplicatesPerRucsack)}`); + +const groupBadges = []; +for (let i = 0; i < rucsacks.length; i += 3) { + const elf1 = new Set(rucsacks[i + 0]); + const elf2 = new Set(rucsacks[i + 1]); + const elf3 = new Set(rucsacks[i + 2]); + const intersection12 = new Set([...elf1].filter(x => elf2.has(x))); + const intersection = Array.from(new Set([...intersection12].filter(x => elf3.has(x)))); + groupBadges.push(...intersection); +} + +console.log(`Part 2: ${accumilatePriority(groupBadges)}`);