Using list of divisor

GeometricTrick.java

	public static int geometricTrickv2(String s){
		
		Set<Integer> indexA = new HashSet<>(s.length());
		Set<Integer> indexC = new HashSet<>(s.length());
    
    List<Integer> indexB = new ArrayList<>();
		
		for(int i=0;i<s.length();i++){
			if(s.charAt(i)=='a')
				indexA.add(i);
			if(s.charAt(i)=='b')
				indexB.add(i);
			if(s.charAt(i)=='c')
				indexC.add(i);
		}
	
		
		int res = 0;
		for(int tmpB:indexB){
			int powB = (int)Math.pow((double)(tmpB+1),2);
			//Set<Integer> factors = new HashSet<>();
			for(int i=2;i<=Math.sqrt((double)powB);i++){
				if(powB%i==0){
					if(i != powB/i)
						if(indexA.contains(i-1)&&indexC.contains(powB/i-1))
							res++;
						if(indexC.contains(i-1)&&indexA.contains(powB/i-1))
							res++;
					else
						if(indexA.contains(i-1)&&indexC.contains(i-1))
							res++;
				}
			}
			
		}
		
        return res;
}