function Main(input){
  var inp = input.split('\n');
  var N = parseInt(inp[0].trim());
  var D = parseInt(inp[1].trim().split(' ')[0]);
  var X = parseInt(inp[1].trim().split(' ')[1]);
  
  var A = [];
  for(var i = 2; i < inp.length; i++){
    var a = parseInt(inp[i].trim());
    A.push(a);
  }
  
  var chocoCount = 0;
  for(var i = 0; i < A.length; i++){
    var temp = count(A[i]);
    chocoCount += temp;
  }

  console.log(chocoCount + X);

  function count(c){
    var day = 0;
    var i = 0; 
    while(true){ 
      day = i * c + 1;
      if(day <= D){
        i++;
      } else {
        break;
      }
    }
    return i;
  }


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