Create mult-strs.py

Multiplication of string number representations without string to int conversions explicitly

mult-strs.py

@@ -0,0 +1,31 @@
+class Solution:
+    def multiply(self, num1: str, num2: str) -> str:
+        total = 0
+        for i,digit in enumerate(num1[::-1]):
+            for j, digit2 in enumerate(num2[::-1]):
+                total += (self.chtoi(digit) * (10 ** i)) * (self.chtoi(digit2) * (10 ** j))
+        return str(total)     
+
+    def chtoi(self, ch: str) -> int:
+        if ch == "0":
+            return 0
+        elif ch == "1":
+            return 1
+        elif ch == "2":
+            return 2
+        elif ch == "3":
+            return 3
+        elif ch == "4":
+            return 4
+        elif ch == "5":
+            return 5
+        elif ch == "6":
+            return 6
+        elif ch == "7":
+            return 7
+        elif ch == "8":
+            return 8
+        elif ch == "9":
+            return 9
+        else:
+            raise Error("bronkened")