#!/usr/bin/env node

var content = require('fs').readFileSync(process.argv[2],'utf8');
//content = `do()${content}don't()`;
//var doregex = /do\(\).+don't\(\)/g
var mulregex = /mul\((\d{1,3}),(\d{1,3})\)/g
var numregex = /\d+/g

//var blocks = content.match(doregex);

function content2sum(content) {
 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];
 }
 return sum;
}
var sum=content.split('do()').map(i=>i.split("don't()")[0]).map(content2sum).reduce((a,b)=>a+b);


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