Initial commit

Easy/add-binary/solution.cpp

@@ -0,0 +1,23 @@
+#include <array>
+#include <string>
+
+class Solution {
+public:
+    std::string addBinary(std::string a, std::string b) {
+        std::string r("");
+        bool c = 0;
+        for (int i = a.size() - 1, j = b.size() - 1; i >= 0 || j >= 0; --i, --j) {
+            bool d = i >= 0 ? a[i] == '1' : 0;
+            bool e = j >= 0 ? b[j] == '1' : 0;
+
+            r = ((bool)(d ^ e ^ c) ? '1' : '0') + r;
+            c = (d & e) || (e & c) || (d & c);
+        }
+
+        if (c) {
+            r = (c ? '1' : '0') + r;
+        }
+
+        return r;
+    }
+};