7 lines
273 B
JavaScript
7 lines
273 B
JavaScript
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const fs = require('fs');
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fs.readFile('input', (err, data) => {
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if (err) throw err;
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let groups = data.toString().split("\n\n").map( (group) => new Set( group.replace(/\r?\n|\r/g, "").split('') ) );
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console.log(groups.reduce((sum, group) => sum + group.size, 0));
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});
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