diff --git a/solutions/65. Valid Number.md b/solutions/65. Valid Number.md
index f6bcfb7..74d2d17 100644
--- a/solutions/65. Valid Number.md	
+++ b/solutions/65. Valid Number.md	
@@ -62,4 +62,49 @@ public:
         return Scan_Signed(s) && s.empty();
     }
 };
-```
\ No newline at end of file
+```
+### 写法二
+思路一样，只是分别检查ABC是否为空，AB不能同时为空。
+``` C++
+class Solution {
+private:
+    bool check_unsign_empty(string &s){
+        int i = 0;
+        while(i < s.size() && s[i] >= '0' && s[i] <= '9') i++;
+        if(i > 0) s = s.substr(i);
+        return i == 0;
+    }
+    bool check_sign_empty(string &s){
+        if(!s.empty() && s[0] == '-' || s[0] == '+') s = s.substr(1);
+        return check_unsign_empty(s);
+    }
+    
+public:
+    bool isNumber(string s) { // A.BeC
+        // 去掉首尾的空格
+        int l = 0, r = s.size() - 1;
+        while(s[l] == ' ') l++;
+        while(l < r && s[r] == ' ') r--;
+        s = s.substr(l, r - l + 1);
+                
+        bool A_is_empty = true, B_is_empty = true, C_is_empty = true;
+        
+        A_is_empty = check_sign_empty(s);
+        
+        if(!s.empty() && s[0] == '.'){
+            s = s.substr(1);
+            B_is_empty = check_unsign_empty(s);
+        }
+        
+        if(A_is_empty && B_is_empty) return false; // AB不能同时为空
+        
+        if(!s.empty() && s[0] == 'e'){
+            s = s.substr(1);
+            C_is_empty = check_sign_empty(s);
+            if(C_is_empty) return false;
+        }
+        
+        return s.empty();
+    }
+};
+```