16

You are a passport issuer, but due to some problems in the system, there are redundant  passport numbers. Your task is to delete all the duplicate passport numbers. You are given a list of passport numbers.

Sample Input :
5
A23 B56 B56 C79 D16

Sample Output :
A23 B56 C79 D16

Sample Input :
5
A23 B56 B56 C79 D16

Sample Output :
B56 B56 C79 B56

const readline = require('readline');
const inp = readline.createInterface({
  input: process.stdin
});
const userInput = [];
inp.on("line", (data) => {
userInput.push(data);
});
inp.on("close", () =>
{var a = parseInt(userInput[0]);
 var inp = String(userInput[1]);
 var arr = inp.split(" ")
 for(i=0;i<a;i++)
 {
 for(j=i+1;j<a;j++)
 {
     if(arr[i]==arr[j])
     arr.splice(i,1)
     i-- //try without this line
   console.log(arr)
 } 
 }
 var str=arr.join(" ")
 console.log(str);
 });