Mystery Sorting Algorithms

The numbers 1 to 4 below represent four unnamed sorting algorithms, each of which can be run on three different sets of data. Click on a histogram to begin a sort. Figure out what sorting algorithm each number corresponds to.

Random data

#1            #2           #3            #4
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag!

An initially presorted array

#1            #2           #3            #4
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag!

An initially reverse-sorted array

#1            #2           #3            #4
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag! alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."Your browser is completely ignoring the <APPLET> tag!