import * as fs from 'fs'
const reader = (s: string) => s.split(' ').map(t => parseInt(t, 10))

function Main(input: string) {
  const N = reader(input)
  const fil = N.sort((a, b) => a - b)

  if (fil[0] + fil[1] === fil[2]) {
    console.log('YES')
  } else {
    console.log('NO')
  }
}

Main(fs.readFileSync('/dev/stdin', 'utf8'))
