add Price is Right Game Nada example

src/price_is_right.py

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+from nada_dsl import *
+
+def nada_main():
+    price = Party(name="Price")
+    player1 = Party(name="Player1")
+    player2 = Party(name="Player2")
+
+    right_price = SecretInteger(Input(name="Price", party=price))
+    player1_input = SecretInteger(Input(name="Player1", party=player1))
+    player2_input = SecretInteger(Input(name="Player2", party=player2))
+
+    # calculate the difference between the guess and the price
+    # set the value to -1 if the guess is greater than the price
+    player1_close_value = (player1_input > right_price).if_else(Integer(-1), right_price - player1_input)
+    player2_close_value = (player2_input > right_price).if_else(Integer(-1), right_price - player2_input)
+
+    condition1 = player1_close_value < player2_close_value
+    exceeding_condition1 = player1_close_value == Integer(-1)
+    exceeding_condition2 = player2_close_value == Integer(-1)
+
+    # check who guess that is closest to the actual price 
+    result = condition1.if_else(Integer(1), Integer(2))
+
+    # check who guess exceed the actual price
+    result = exceeding_condition1.if_else(Integer(2), result)
+    result = exceeding_condition2.if_else(Integer(1), result)
+
+    # if all guesses exceed the actual price or if it a tie, return 0 for no winner
+    result = (player1_close_value == player2_close_value).if_else(Integer(0), result)
+
+    # O - no winner
+    # 1 - player 1 win
+    # 2 - player 2 win
+    return [Output(result, "winner", price)]

tests/price_is_right.yaml

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+---
+program: price_is_right
+inputs:
+  Price:
+    SecretInteger: "5"
+  Player1:
+    SecretInteger: "2"
+  Player2:
+    SecretInteger: "4"
+expected_outputs:
+  winner:
+    SecretInteger: "2"