let i = require('fs').readFileSync('/dev/stdin', 'utf8').split('\n')
let c = Array.from(new Array(parseInt(i[0]))).map((e, i) => i+1)
i[1].split(' ').forEach((e) => {
  let t = c[e-1]
  c.splice(e-1, 1)
  c.unshift(t)
})
console.log(c[0])