14 lines
590 B
JavaScript
14 lines
590 B
JavaScript
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var regs = {};
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var lines = require("fs").readFileSync("input.txt").toString().split("\n").filter((a)=>(a));
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getreg = (reg)=>((reg in regs) ? (regs[reg]) : (0));
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for(var line of lines){
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var condition = new RegExp("[a-z]+ (inc|dec) (-?)[0-9]+ if (.*)").exec(line)[3].replace(/^([a-z]+) (.*)/, "getreg('$1') $2");
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if(eval(condition)){
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if(!(line.split(" ")[0] in regs)){
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regs[line.split(" ")[0]] = 0;
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}
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regs[line.split(" ")[0]] += ((line.split(" ")[1] == "inc") ? 1 : -1) * parseInt(line.split(" ")[2]);
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}
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}
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console.log(Math.max.apply(null, Object.keys(regs).map((a)=>(regs[a]))));
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