package algs35;
import stdlib.*;
/* ***********************************************************************
 *  Compilation:  javac DeDup.java
 *  Execution:    java DeDup < input.txt
 *  Dependencies: SET StdIn.java StdOut.java
 *  Data files:   http://algs4.cs.princeton.edu/35applications/tinyTale.txt
 *
 *  Read in a list of words from standard input and print out
 *  each word, removing any duplicates.
 *
 *  % more tinyTale.txt
 *  it was the best of times it was the worst of times
 *  it was the age of wisdom it was the age of foolishness
 *  it was the epoch of belief it was the epoch of incredulity
 *  it was the season of light it was the season of darkness
 *  it was the spring of hope it was the winter of despair
 *
 *  % java DeDup < tinyTale.txt
 *  it
 *  was
 *  the
 *  best
 *  of
 *  times
 *  worst
 *  age
 *  wisdom
 *  ...
 *  winter
 *  despair
 *
 *************************************************************************/

public class DeDup {
	public static void main(String[] args) {
		StdIn.fromFile ("data/tinyTale.txt");

		SET<String> set = new SET<>();

		// read in strings and add to set
		while (!StdIn.isEmpty()) {
			String key = StdIn.readString();
			if (!set.contains(key)) {
				set.add(key);
				StdOut.println(key);
			}
		}
	}
}