function getFreeUrinals(s){
  if (/11/.test(s)) return -1;
  let a = s.replace(/.{2}/g, e => e + " ").trim().split(" ");
  let b = a.map(e => {
    return e==="00" ? 1 :
           e==="10" ? 2 :
           e==="01" ? 3 :
           e==="0"  ? 4 :
           5;
  });
  console.log(b)
  let c = b.reduce((acc, val, i, arr) => {
    return val === 4 && arr[i-1] == 1 && arr[i-2] == 3 ? acc :
           val === 4 && (arr[i-1]===1 || arr[i-1]===2) ? acc+1 :
           val === 4 && arr[i-1] === undefined ? acc+1 :
           val === 1 ? acc+1 :
           acc
  },0);
  return c;
}