21 lines
640 B
JavaScript
21 lines
640 B
JavaScript
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const fs = require('fs');
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const data = fs.readFileSync('input.txt', 'utf-8');
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const groups = data.split('\n\n');
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let sum = 0
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for (let g = 0; g<groups.length; g++){
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// list of people in group
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let group = groups[g].split('\n')
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// first person
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let first = group[0]
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// for each of the first person's answers
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for (let answer = 0; answer < first.length; answer++) {
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// if the total amount of that answer in the group is equal to the amount of people in the group, then everyone in the group answered that question
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if (group.length == [...groups[g].matchAll(first[answer])].length) {
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sum++
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}
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}
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}
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console.log(sum)
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