Merge pull request #3 from Chayandas07/Chayandas07-patch-3

Create 27 NOV 27 November  Add Binary Strings

Author: Chayandas07

27 NOV 27 November Add Binary Strings

@@ -0,0 +1,45 @@
+class Solution{
+public: 
+ string addBinary(string A, string B)
+ {
+      string res;
+
+        int i = A.length() - 1;
+
+        int j = B.length() - 1;
+
+        int carry = 0;
+
+        while(i >= 0 || j >= 0){
+
+            int sum = carry;
+
+            if(i >= 0) sum += A[i--] - '0';
+
+            if(j >= 0) sum += B[j--] - '0';
+
+            carry = sum > 1 ? 1 : 0;
+
+            res += to_string(sum % 2);
+
+        }
+
+        if(carry) res += to_string(carry);
+
+        reverse(res.begin(), res.end());
+
+        i = 0;
+
+     while(res[i] == '0')
+
+     {
+
+         res.erase(0, 1);
+
+     }
+
+  
+
+        return res;
+ }
+};