diff --git a/5.leetcode/src/com/fanxb/common/Q58.java b/5.leetcode/src/com/fanxb/common/Q58.java
new file mode 100644
index 0000000..370c90d
--- /dev/null
+++ b/5.leetcode/src/com/fanxb/common/Q58.java
@@ -0,0 +1,43 @@
+package com.fanxb.common;
+
+/**
+ * Created with IntelliJ IDEA
+ *
+ * @author fanxb
+ * Date: 2020/6/9 15:10
+ */
+public class Q58 {
+
+    public int lengthOfLastWord(String s) {
+        int count = 0, length = s.length();
+        boolean lastCharBlank = false;
+        for (int i = 0; i < length; i++) {
+            char c = s.charAt(i);
+            if (c == ' ') {
+                lastCharBlank = true;
+            } else {
+                if (lastCharBlank) count = 0;
+                count++;
+                lastCharBlank = false;
+            }
+        }
+        return count;
+    }
+
+    public int lengthOfLastWord1(String s) {
+        int length = s.length(), i;
+        // find last word's first char index
+        for (i = length - 1; i >= 0; i--) {
+            if (s.charAt(i) != ' ') break;
+        }
+        // cal last word count
+        for (int j = i - 1; j >= 0; j--) {
+            if (s.charAt(j) == ' ') return i - j;
+        }
+        return i + 1;
+    }
+
+    public static void main(String[] args) {
+        System.out.println(new Q58().lengthOfLastWord("  asdfasdfasdf"));
+    }
+}