diff --git a/1-grid-world/3-monte-carlo/mc_agent.py b/1-grid-world/3-monte-carlo/mc_agent.py
index 975467b..83dfa51 100644
--- a/1-grid-world/3-monte-carlo/mc_agent.py
+++ b/1-grid-world/3-monte-carlo/mc_agent.py
@@ -28,7 +28,7 @@ def update(self):
             state = str(reward[0])
             if state not in visit_state:
                 visit_state.append(state)
-                G_t = self.discount_factor * (reward[1] + G_t)
+                G_t = reward[1] + self.discount_factor * G_t
                 value = self.value_table[state]
                 self.value_table[state] = (value +
                                            self.learning_rate * (G_t - value))
@@ -106,7 +106,6 @@ def possible_next_state(self, state):
 
             # 에피소드가 완료됐을 때, 큐 함수 업데이트
             if done:
-                print("episode : ", episode)
                 agent.update()
                 agent.samples.clear()
                 break