45 lines
977 B
JavaScript
45 lines
977 B
JavaScript
import * as fs from "fs";
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const simple = /(\w+): (\d+)/;
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const operation = /(\w+): (\w+) ([+\-*/]) (\w+)/;
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function load(filename) {
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let res = {};
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fs.readFileSync(filename, "utf8")
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.trim()
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.split("\n")
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.forEach(line => {
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const s = line.match(simple);
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if (s) {
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res[s[1]] = function() { return parseInt(s[2]); };
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} else {
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const o = line.match(operation);
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res[o[1]] = function () {
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let left = res[o[2]]();
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let right = res[o[4]]();
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switch(o[3]) {
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case "+": return left + right;
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case "-": return left - right;
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case "*": return left * right;
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case "/": return left / right;
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}
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};
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}
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});
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return res;
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}
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let example = load("example");
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let input = load("input");
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function solve(input) {
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return input["root"]();
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}
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const exampleOutput = solve(example);
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if (exampleOutput !== 152) {
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console.log("Example failed with " + exampleOutput);
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process.exit(1); // eslint-disable-line
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}
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console.log(solve(input));
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