Inject multiple interface implementations into class constructor

I'm new with Java Guice, and I have trouble with designing my application.
I'll try to explain my design and the desired result as simple as I can.

I have an interface called Ialgorithm, and 3 implementations of that interface, lets say IalgorithmA,IalgorithmB,IalgirthmC.

I have a class called myClass with the following constructor:

public myClass(Ialgorithm alg) {...}

Now I want to be able to inject an instance of one of the implementations of the Ialgorithm interface, using annotations: I want at the end to be able to write in my main:

// ... intialize an Injector with a Moudle that extents AbstractModule
myClass a = injecotr.getInstance(key.get(myClass.class,Aannotation.class));
myClass b = injecotr.getInstance(key.get(myClass.class,Bannotation.class));
myClass c = injecotr.getInstance(key.get(myClass.class,Cannotation.class));

I read a few tutorials in the web, but I couldn't find exact way to achieve this.

In addition, and after the above issue will be solved, I extend my question: Actually, The third implementation, IalgirthmC, is different from the two other implementations which contain a default constructor: its constructor is:

public IalgorithmC(Ialgorithm,int n) {...}

Now it becomes more complicated... because I want the Guice to inject the Ialgorithm parameter, but the int parameter shouldn't injected by the Guice (@Assisted), and this whole instance of IalgorithmC should be injected into myClass when using the Cannotaion.
Of course that I should provide a value for the int parameter and an annotation to the internal Ialgorithm in IalgorithmC.

Thank you all for any help.