5 files changed, 105 insertions, 31 deletions
diff --git a/README.md b/README.md
index 53915d5..5f753c6 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,9 @@ If we tell you to update the library, use this:
 
     pip install -U ACT4E-mcdp
 
-## Running the tests
+## Make sure everything is OK
+
+### Downloading test cases
 
 Use this command to download the test cases:
 
@@ -47,32 +49,55 @@ Use this command to download the test cases:
 
 Then you have available a few test cases in the directory `downloaded/`.
 
-This is the command you use to run the solver:
+### Running the DP solver
+
+This is the command you use to run the DP solver:
 
-    act4e-mcdp-solve \
-        --solver act4e_mcdp_solution.MySolution \
+    act4e-mcdp-solve-dp \
+        --solver act4e_mcdp_solution.DPSolver \
         --query FixFunMinRes \
-        --model downloaded/lib1-parts.e03_splitter1.models.mcdpr1.yaml \
-        --data '{f: 10}'
+        --model downloaded/lib1-parts.e03_splitter1.primitivedps.mcdpr1.yaml \
+        --data '42'
 
-In turn:
+In brief:
 
-* `--solver act4e_mcdp_solution.MySolution`: this selects your solver;
+* `--solver act4e_mcdp_solution.DPSolver`: this selects the class for your solver;
 * `--query FixFunMinRes`: this selects `FixFunMinRes` (other choice: `FixResMaxFun`);
-* `--model downloaded/lib1-parts.e03_splitter1.models.mcdpr1.yaml`: this selects the model to use for optimization;
-* `--data '{f: 10}'`: this selects the query to give. It is a YAML dictionary with a key for each functionality name.
+* `--model downloaded/lib1-parts.e03_splitter1.primitivedps.mcdpr1.yaml`: this selects the model to use for optimization;
+* `--data '10'`: this selects the query to give. 
+
+It is a YAML dictionary with a key for each functionality name.
 
 You will see the result in the logs:
 
 ```
-INFO query: {'f': Decimal('10')}
-INFO solution: UpperSet(minima=[])
+INFO query: 10
+INFO solution: Interval(pessimistic=UpperSet(minima=[]), optimistic=UpperSet(minima=[]))
 ```
 
 The template `act4e_mcdp_solution.MySolution` always returns an empty `UpperSet` (= infeasible).
-At this point, you can start implementing your solver.
 
-For testing, run `act4e-mcdp-solve` on different files.
 
+### Running the MCDP solver
+
+
+This is the command you use to run the MCDP solver:
+
+    act4e-mcdp-solve-mcdp \
+        --solver act4e_mcdp_solution.MCDPSolver \
+        --query FixFunMinRes \
+        --model downloaded/lib1-parts.e03_splitter1.models.mcdpr1.yaml \
+        --data '{f: 42}'
+
+Note that for the MCDP solver we give a file of type `models.mcdpr1.yaml` instead of `primitivedps.mcdpr1.yaml`.
+
+For the data, we use a key-value pair with the functionality name and the value.
+
+You should see the output:
+
+    query: {'f': Decimal('42')}
+    solution: Interval(pessimistic=UpperSet(minima=[]), optimistic=UpperSet(minima=[]))
+
+## Next steps
 
-TODO: provide a exhaustive test case.
+TODO: exhaustive test case
diff --git a/src/act4e_mcdp_solution/__init__.py b/src/act4e_mcdp_solution/__init__.py
index c3fe37e..cddc7c6 100644
--- a/src/act4e_mcdp_solution/__init__.py
+++ b/src/act4e_mcdp_solution/__init__.py
@@ -7,4 +7,5 @@ import logging
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
 
-from .solution import *
+from .solver_dp import *
+from .solver_mcdp import *
diff --git a/src/act4e_mcdp_solution/solution.py b/src/act4e_mcdp_solution/solution.py
deleted file mode 100644
index 4704807..0000000
--- a/src/act4e_mcdp_solution/solution.py
+++ /dev/null
@@ -1,15 +0,0 @@
-from typing import Any, Mapping
-
-from act4e_mcdp import NamedDP, SolverInterface, UpperSet, LowerSet
-
-__all__ = ["MySolution"]
-
-
-class MySolution(SolverInterface):
-    def solve_FixFunMinRes(self, model: NamedDP, query: Mapping[str, Any]) -> UpperSet[Mapping[str, Any]]:
-        # returns the empty upper set - marking it as infeasible
-        return UpperSet([])
-
-    def solve_FixResMaxFun(self, model: NamedDP, query: Mapping[str, Any]) -> LowerSet[Mapping[str, Any]]:
-        # returns the empty upper set - marking it as infeasible
-        return LowerSet([])
diff --git a/src/act4e_mcdp_solution/solver_dp.py b/src/act4e_mcdp_solution/solver_dp.py
new file mode 100644
index 0000000..8a4d58c
--- /dev/null
+++ b/src/act4e_mcdp_solution/solver_dp.py
@@ -0,0 +1,29 @@
+from act4e_mcdp import DPSolverInterface, Interval, LowerSet, PrimitiveDP, UpperSet
+
+__all__ = [
+    "DPSolver",
+]
+
+
+class DPSolver(DPSolverInterface):
+    def solve_dp_FixFunMinRes(
+        self,
+        dp: PrimitiveDP,
+        functionality_needed: object,
+        /,
+        resolution_optimistic: int = 0,
+        resolution_pessimistic: int = 0,
+    ) -> Interval[UpperSet[object]]:
+        optimistic = pessimistic = UpperSet([])
+        return Interval(pessimistic=pessimistic, optimistic=optimistic)
+
+    def solve_dp_FixResMaxFun(
+        self,
+        dp: PrimitiveDP,
+        resource_budget: object,
+        /,
+        resolution_optimistic: int = 0,
+        resolution_pessimistic: int = 0,
+    ) -> Interval[LowerSet[object]]:
+        optimistic = pessimistic = LowerSet([])
+        return Interval(pessimistic=pessimistic, optimistic=optimistic)
diff --git a/src/act4e_mcdp_solution/solver_mcdp.py b/src/act4e_mcdp_solution/solver_mcdp.py
new file mode 100644
index 0000000..12ab619
--- /dev/null
+++ b/src/act4e_mcdp_solution/solver_mcdp.py
@@ -0,0 +1,34 @@
+from typing import Any, Mapping
+
+from act4e_mcdp import Interval, LowerSet, MCDPSolverInterface, NamedDP, UpperSet
+
+__all__ = [
+    "MCDPSolver",
+]
+
+
+class MCDPSolver(MCDPSolverInterface):
+    def solve_mcdp_FixFunMinRes(
+        self,
+        graph: NamedDP,
+        functionality_needed: Mapping[str, Any],
+        /,
+        resolution_optimistic: int = 0,
+        resolution_pessimistic: int = 0,
+    ) -> Interval[UpperSet[Mapping[str, Any]]]:
+        value_as_tuple = tuple(functionality_needed[key] for key in graph.functionalities)
+
+        optimistic = pessimistic = UpperSet([])
+        return Interval(pessimistic=pessimistic, optimistic=optimistic)
+
+    def solve_mcdp_FixResMaxFun(
+        self,
+        graph: NamedDP,
+        resources_budget: Mapping[str, Any],
+        /,
+        resolution_optimistic: int = 0,
+        resolution_pessimistic: int = 0,
+    ) -> Interval[LowerSet[Mapping[str, Any]]]:
+        value_as_tuple = tuple(resources_budget[key] for key in graph.resources)
+        optimistic = pessimistic = LowerSet([])
+        return Interval(pessimistic=pessimistic, optimistic=optimistic)