package algs51; // section 5.0
import stdlib.*;
/* ***********************************************************************
 *  Compilation:  javac Squeeze.java
 *  Execution:    java Squeeze
 *  Dependencies: In.java
 *
 *  Takes a string command line argument and removes adjacent spaces.
 *
 *  % java Squeeze "this is    a    test"
 *  this is a test
 *
 *************************************************************************/

public class XSqueeze {
	public static String squeeze(String s) {
		char[] a = s.toCharArray();
		int N = 1;
		for (int i = 1; i < a.length; i++) {
			a[N] = a[i];
			if      (a[N]   != ' ') N++;
			else if (a[N-1] != ' ') N++;
		}
		return new String(a, 0, N);
	}


	public static void main(String[] args) {
		args = new String[] { "this is    a    test" };
		StdOut.println(squeeze(args[0]));
	}

}