diff --git "a/Programmers/\354\240\204\355\231\224\353\262\210\355\230\270_\353\252\251\353\241\235.cpp" "b/Programmers/\354\240\204\355\231\224\353\262\210\355\230\270_\353\252\251\353\241\235.cpp"
new file mode 100644
index 0000000..8991152
--- /dev/null
+++ "b/Programmers/\354\240\204\355\231\224\353\262\210\355\230\270_\353\252\251\353\241\235.cpp"
@@ -0,0 +1,17 @@
+#include <string>
+#include <vector>
+#include <algorithm>
+
+using namespace std;
+
+bool solution(vector<string> phone_book) {
+    sort(phone_book.begin(), phone_book.end());
+    
+    for (int i = 0; i < phone_book.size() - 1; i++) {
+        if (phone_book[i + 1].find(phone_book[i]) == 0) {
+            return false;
+        } 
+    }
+    
+    return true;
+}
\ No newline at end of file