js equal numbers

function equalPairs (input) {
  input = input.map(Number)
  let count = input[0]
  let first = input[1]
  let second = input[2]
  let total = first + second
  let maxDifference = 0

  for (let i = 3; i <= count * 2; i += 2) {
    first = input[i]
    second = input[i + 1]

    let currentTotal = first + second
    let currentDifference = Math.abs(currentTotal - total)
    if (currentDifference > maxDifference) {
      maxDifference = currentDifference
    }

    total = currentTotal
  }

  let result = maxDifference === 0 ? `Yes, value=${total}` : `No, maxdiff=${maxDifference}`
  console.log(result)
}