Add code for 2015 advent that I did historically.

day_1/part_2.py

@@ -0,0 +1,23 @@
+data = input("Input Instruction set: \n")
+
+floor_delta = 0
+first_negative_instruction = None
+
+
+# Run through instruction set
+for index in range(len(data)):
+	char = data[index]
+
+	# Increment floor delta
+	if char == "(":
+		floor_delta += 1
+
+	# Decrement floor delta and track what the first index that causes us to go
+	# negative is.
+	elif char == ")":
+		floor_delta -= 1
+		if floor_delta == -1 and not first_negative_instruction:
+			first_negative_instruction = index + 1
+			break
+
+print(f"First Negative Instruction: {first_negative_instruction}")