#!/usr/bin/env node

var content = require('fs').readFileSync(process.argv[2],'utf8');

var mulregex = /mul\((\d{1,3}),(\d{1,3})\)/g
var numregex = /\d+/g


var muls = content.match(mulregex);
var sum=0;
for(var mul of muls) {
 var digits = mul.match(numregex);
 var values = digits.map(i=>parseInt(i));
 //console.log({digits,values});
 sum+=values[0]*values[1];
}

console.log('Result:',sum);