1 files changed, 45 insertions, 0 deletions
diff --git a/works/solutions/cpp/917.cpp b/works/solutions/cpp/917.cpp
new file mode 100644
index 0000000..d01d795
--- /dev/null
+++ b/works/solutions/cpp/917.cpp
@@ -0,0 +1,45 @@
+#include <string>
+#include <cctype>
+#include <utility>
+
+using std::string;
+
+class Solution
+{
+public:
+    string reverseOnlyLetters(string s)
+    {
+        if (s.empty())
+            return s;
+
+        auto front = s.rend();
+        auto back = s.end();
+
+        bool move_front = true;
+        while (true)
+        {
+            if (move_front)
+            {
+                if (std::isalpha(*--front))
+                {
+                    move_front = false;
+                }
+            }
+            else
+            {
+                if (std::isalpha(*--back))
+                {
+                    std::swap(*front, *back);
+                    move_front = true;
+                }
+            }
+
+            if (front.base() == back)
+            {
+                break;
+            }
+        }
+
+        return s;
+    }
+};