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]));
  }

}