diff --git a/length_of_last_word.cpp b/length_of_last_word.cpp
new file mode 100644
index 00000000..7cb6c03e
--- /dev/null
+++ b/length_of_last_word.cpp
@@ -0,0 +1,13 @@
+class Solution {
+public:
+    int lengthOfLastWord(string s) {
+        int i = s.size() - 1;
+        while (i >= 0 && s[i] == ' ') --i;
+        int len = 0;
+        while (i >= 0 && s[i] != ' ') {
+            ++len;
+            --i;
+        }
+        return len;
+    }
+};