diff --git a/solutions/ex00/fruit_homework_TODO_1.py b/solutions/ex00/fruit_homework_TODO_1.py
new file mode 100644
index 0000000000000000000000000000000000000000..b498ceb06d3fa5ab7a183da45428d83a52e1a5cb
--- /dev/null
+++ b/solutions/ex00/fruit_homework_TODO_1.py
@@ -0,0 +1 @@
+ return a+b
\ No newline at end of file
diff --git a/solutions/ex00/fruit_homework_TODO_2.py b/solutions/ex00/fruit_homework_TODO_2.py
new file mode 100644
index 0000000000000000000000000000000000000000..f546843734ee5aa45c7345b9bd8d3bfdca5600ff
--- /dev/null
+++ b/solutions/ex00/fruit_homework_TODO_2.py
@@ -0,0 +1 @@
+ return ["mr " + a for a in animals]
\ No newline at end of file
diff --git a/solutions/ex00/fruit_homework_TODO_3.py b/solutions/ex00/fruit_homework_TODO_3.py
new file mode 100644
index 0000000000000000000000000000000000000000..5be72c6f38c133f5b1a2f5a09acff6d2eefda3ee
--- /dev/null
+++ b/solutions/ex00/fruit_homework_TODO_3.py
@@ -0,0 +1 @@
+ return sum([x * p for x, p in p_dict.items()])
\ No newline at end of file
diff --git a/solutions/ex00/fruit_homework_TODO_4.py b/solutions/ex00/fruit_homework_TODO_4.py
new file mode 100644
index 0000000000000000000000000000000000000000..84c3b39c208f1eb0dbda3f5f8001c82e9af2cb4b
--- /dev/null
+++ b/solutions/ex00/fruit_homework_TODO_4.py
@@ -0,0 +1 @@
+ return self.prices[fruit]
\ No newline at end of file
diff --git a/solutions/ex01/bobs_friend_TODO_1.py b/solutions/ex01/bobs_friend_TODO_1.py
new file mode 100644
index 0000000000000000000000000000000000000000..2d03d7c5a8beff870e8ced0000a122c5b9952d75
--- /dev/null
+++ b/solutions/ex01/bobs_friend_TODO_1.py
@@ -0,0 +1,3 @@
+
+ self.s = self.x0
+
\ No newline at end of file
diff --git a/solutions/ex01/bobs_friend_TODO_2.py b/solutions/ex01/bobs_friend_TODO_2.py
new file mode 100644
index 0000000000000000000000000000000000000000..9caf28ad6988a09d81ea82bcebf257c4fd4caf0c
--- /dev/null
+++ b/solutions/ex01/bobs_friend_TODO_2.py
@@ -0,0 +1,9 @@
+ terminated = True
+ if a == 0:
+ s_next = self.s * 1.1
+ else:
+ if np.random.rand() < 1/4:
+ s_next = 0
+ else:
+ s_next = self.s + 12
+ reward = s_next - self.s
\ No newline at end of file
diff --git a/solutions/ex01/bobs_friend_TODO_3.py b/solutions/ex01/bobs_friend_TODO_3.py
new file mode 100644
index 0000000000000000000000000000000000000000..8399f7fba970e6acf6b370dadd567754b5f8bc7e
--- /dev/null
+++ b/solutions/ex01/bobs_friend_TODO_3.py
@@ -0,0 +1 @@
+ return 0
\ No newline at end of file
diff --git a/solutions/ex01/bobs_friend_TODO_4.py b/solutions/ex01/bobs_friend_TODO_4.py
new file mode 100644
index 0000000000000000000000000000000000000000..36a268f2fa289cbbb6a96ae75376e8e1cc5ea729
--- /dev/null
+++ b/solutions/ex01/bobs_friend_TODO_4.py
@@ -0,0 +1 @@
+ return 1
\ No newline at end of file
diff --git a/solutions/ex01/chess_TODO_1.py b/solutions/ex01/chess_TODO_1.py
new file mode 100644
index 0000000000000000000000000000000000000000..f8752f92f9185d2b2e05cd157a1b5372b6b9560b
--- /dev/null
+++ b/solutions/ex01/chess_TODO_1.py
@@ -0,0 +1 @@
+ self.s = []
\ No newline at end of file
diff --git a/solutions/ex01/chess_TODO_2.py b/solutions/ex01/chess_TODO_2.py
new file mode 100644
index 0000000000000000000000000000000000000000..9b829905c94cfd57d43edfcfeecdfe8bd36039b6
--- /dev/null
+++ b/solutions/ex01/chess_TODO_2.py
@@ -0,0 +1,7 @@
+ if np.random.rand() < self.p_draw:
+ game_outcome = 0
+ else:
+ if np.random.rand() < self.p_win:
+ game_outcome = 1
+ else:
+ game_outcome = -1
\ No newline at end of file
diff --git a/solutions/ex01/chess_TODO_3.py b/solutions/ex01/chess_TODO_3.py
new file mode 100644
index 0000000000000000000000000000000000000000..29e14434d6508e15f098119b60f2e0e6e15390d9
--- /dev/null
+++ b/solutions/ex01/chess_TODO_3.py
@@ -0,0 +1 @@
+ done = len(self.s) >= 2 and self.s[-1] == self.s[-2] and self.s[-1] != 0
\ No newline at end of file
diff --git a/solutions/ex01/chess_TODO_4.py b/solutions/ex01/chess_TODO_4.py
new file mode 100644
index 0000000000000000000000000000000000000000..d45e38a4592d6c99a05d741916eb6655c2babebf
--- /dev/null
+++ b/solutions/ex01/chess_TODO_4.py
@@ -0,0 +1 @@
+ r = self.s[-1] == 1 if done else 0
\ No newline at end of file
diff --git a/solutions/ex01/chess_TODO_5.py b/solutions/ex01/chess_TODO_5.py
new file mode 100644
index 0000000000000000000000000000000000000000..c270359f1626954b313683214d93beb8a786521b
--- /dev/null
+++ b/solutions/ex01/chess_TODO_5.py
@@ -0,0 +1 @@
+ stats, _ = train(env, Agent(env), num_episodes=T)
\ No newline at end of file
diff --git a/solutions/ex01/inventory_environment_TODO_1.py b/solutions/ex01/inventory_environment_TODO_1.py
new file mode 100644
index 0000000000000000000000000000000000000000..5f5a775b790f2dfb76f573b6c1b4ee7b4a8442fb
--- /dev/null
+++ b/solutions/ex01/inventory_environment_TODO_1.py
@@ -0,0 +1,5 @@
+ s_next = max(0, min(2, self.s-w+a)) # next state; x_{k+1} = f_k(x_k, u_k, w_k)
+ reward = -(a + (self.s + a - w)**2) # reward = -cost = -g_k(x_k, u_k, w_k)
+ terminated = self.k == self.N-1 # Have we terminated? (i.e. is k==N-1)
+ self.s = s_next # update environment state
+ self.k += 1 # update current time step
\ No newline at end of file
diff --git a/solutions/ex01/inventory_environment_TODO_2.py b/solutions/ex01/inventory_environment_TODO_2.py
new file mode 100644
index 0000000000000000000000000000000000000000..bebe04bc25189f1dad2fbd10c30070cd823b5b9e
--- /dev/null
+++ b/solutions/ex01/inventory_environment_TODO_2.py
@@ -0,0 +1 @@
+ return np.random.choice(3) # Return a random action
\ No newline at end of file
diff --git a/solutions/ex01/inventory_environment_TODO_3.py b/solutions/ex01/inventory_environment_TODO_3.py
new file mode 100644
index 0000000000000000000000000000000000000000..0855951dfbae56cfc204cab87b19954e2e4bf074
--- /dev/null
+++ b/solutions/ex01/inventory_environment_TODO_3.py
@@ -0,0 +1,7 @@
+ a = agent.pi(s, k)
+ sp, r, terminated, truncated, metadata = env.step(a)
+ agent.train(s, a, sp, r, terminated)
+ s = sp
+ J += r
+ if terminated or truncated:
+ break
\ No newline at end of file
diff --git a/solutions/ex01/pacman_hardcoded_TODO_1.py b/solutions/ex01/pacman_hardcoded_TODO_1.py
new file mode 100644
index 0000000000000000000000000000000000000000..5c532d7fae997f5c6a4d7e8383dbbb14af8a12e8
--- /dev/null
+++ b/solutions/ex01/pacman_hardcoded_TODO_1.py
@@ -0,0 +1,7 @@
+ if k < 7:
+ return 'South'
+ elif k < 14:
+ return 'East'
+ elif k < 21:
+ return 'North'
+ elif k < 28:
\ No newline at end of file