4 lines
226 B
JavaScript
4 lines
226 B
JavaScript
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var input = require("fs").readFileSync("input.txt").toString().replace("\n", "");
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var chars = input.split("").map((a)=>(parseInt(a)));
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console.log(chars.filter((a, i)=>(chars[(i+1)%chars.length] == a)).reduce((a, b)=>(a+b)));
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