const twoSum = (numbers, sum) => {
    let store = new Map()
   store.set(numbers[0],0)
   for( let i = 1; i < numbers.length; i++) {
      let match = sum-numbers[i];
      if(store.has(match)){
         return [store.get(match),i]
      } else {
         store.set(numbers[i],i)
      }

   }
   return [-1,-1];
}