save to file the valid equations with valid operators.

solutions/orso/day07/day_7.py

@@ -140,6 +140,18 @@ def solve(self) -> bool:
                     b_continue = False  #solution not found           
             return True #FAIL  
 
+        def get_equation_string(self)->str:
+            """
+            generate a string of the equation: "5=3+2"
+            """
+            if len(self.s_operators) <= 0:
+                return str()
+            s_result = f"{self.n_result}={self.ln_arguments[0]}"
+            for n_index, s_operator in enumerate(self.s_operators):
+                s_result += f" {s_operator} {self.ln_arguments[n_index+1]}"
+            logging.debug(f"{s_result}")
+            return s_result
+
     def __init__(self):
         """
         Initialize the Patrol_route class
@@ -175,7 +187,17 @@ def solve(self) -> int:
             else:
                 logging.debug(f"NOT SOLVABLE:")
         return n_accumulator_result
-
+
+    def save_results( self, s_filename : str ) -> bool:
+        try:
+            with open(s_filename, 'w') as file:
+                for st_equation in self.glst_equation:
+                    s_equation = st_equation.get_equation_string()
+                    print(s_equation)
+                    if (len(s_equation) > 0):
+                        file.write(s_equation + '\n')
+        except Exception as e:
+            logging.error(f"Save Failed: {e}")
 #--------------------------------------------------------------------------------------------------------------------------------
 #   MAIN
 #--------------------------------------------------------------------------------------------------------------------------------
@@ -201,4 +223,5 @@ def solve(self) -> int:
     cl_operator_finder.load_equations(gs_filename_data)
     cl_operator_finder.show()
     n_accumulator_result = cl_operator_finder.solve()
+    cl_operator_finder.save_results('day07\day_7_output_part_1.txt')
     print(f"accumulator: {n_accumulator_result}")

solutions/orso/day07/day_7_formulation.txt

@@ -51,5 +51,27 @@ In the above example, the sum of the test values for the three equations listed
 
 Determine which equations could possibly be true. What is their total calibration result?
 
+--- Part Two ---
+
+The engineers seem concerned;
+the total calibration result you gave them is nowhere close to being within safety tolerances.
+Just then, you spot your mistake: some well-hidden elephants are holding a third type of operator.
+
+The concatenation operator (||) combines the digits from its left and right inputs into a single number.
+For example, 12 || 345 would become 12345. All operators are still evaluated left-to-right.
+
+Now, apart from the three equations that could be made true using only addition and multiplication,
+the above example has three more equations that can be made true by inserting operators:
+
+    156: 15 6 can be made true through a single concatenation: 15 || 6 = 156.
+    7290: 6 8 6 15 can be made true using 6 * 8 || 6 * 15.
+    192: 17 8 14 can be made true using 17 || 8 + 14.
+
+Adding up all six test values (the three that could be made before using only + and * plus the new three that can now be made by also using ||)
+produces the new total calibration result of 11387.
+
+Using your new knowledge of elephant hiding spots, determine which equations could possibly be true. What is their total calibration result?
+
+