process.stdin.resume();
process.stdin.setEncoding('utf8');

var lines = []
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});

reader.on('line', (line) => {
  lines.push(line);
});

reader.on('close', () => {
 var n = Number(lines[0]);
 var dx = lines[1].split(' ');
 var d = Number(dx[0]);
 var x = Number(dx[1]);
 var sum = 0;

 for(i=2; i<n+2; i++){
   var j = 0;
   while(true){
     var ai = Number(lines[i]);
     var day = (j*ai) + 1;
     if(day <= d){
       sum++;
       j++;
     }else{
       break;
     }
   }
 }

 console.log(sum + x);
 
});