"use strict"

const Main = (inpuut)=>{
const Array= inpuut.split(/\n/)
const N = Array[0]-0
const D = Array[1].split(" ").map((ele)=>{return ele-0})[0]
const X =Array[1].split(" ").map((ele)=>{return ele-0})[1]

let sum = 0

// iが人
//jがAにかかる係数

for (let i=1; i<=N; i+=1){
  const A = Array[i+1]-0

  for(let j=0;A*j+1<=D;j++){
   sum+=1
  }
 
}

console.log(sum+X)
}


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