public static void exec(String[] paths) {
    	
    	String[] hashFuncs = GetInput.askHashSet("Hash functions to test");
    	HashFunction[] tab = new HashFunction[hashFuncs.length];
    	for (int i = 0; i < tab.length; i++)
    		tab[i] = HashFunction.getHashFunction(hashFuncs[i]);
    	
    	Path[] tab2 = new Path[paths.length];
    	for (int i = 0; i < paths.length; i++)
    		tab2[i] = Paths.get(paths[i]);
    	
    	speedCollisionTests(tab, tab2);
    }