Nick Thomas
f1be11fca8
git-subtree-dir: 2020 git-subtree-mainline:ab8f135946git-subtree-split:aaabfa90c9
31 lines
662 B
JavaScript
31 lines
662 B
JavaScript
const fs = require('fs')
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const readline = require('readline');
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const readInterface = readline.createInterface({
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input: fs.createReadStream('input'),
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console: false
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});
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let re = /^(\d+)-(\d+) (\w+): (\w+)$/i
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let valid = 0;
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readInterface.on('line', function(line) {
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let result = re.exec(line);
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if (result == null) {
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return;
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}
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let pos1 = Number(result[1]) - 1;
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let pos2 = Number(result[2]) - 1;
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let match = result[3];
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let pass = result[4];
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if ((pass[pos1] == match && pass[pos2] != match) || (pass[pos1] != match && pass[pos2] == match)) {
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valid++;
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};
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});
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readInterface.on('close', function(line) {
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console.log(valid);
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});
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