diff --git a/.gitignore b/.gitignore
index 3126d03..b7ba0b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 main
 .vscode
+main.dSYM
\ No newline at end of file
diff --git a/1657-231130/main.cpp b/1657-231130/main.cpp
new file mode 100644
index 0000000..ac069a9
--- /dev/null
+++ b/1657-231130/main.cpp
@@ -0,0 +1,50 @@
+#include<stdcpp.h>
+using namespace std;
+
+class Solution{
+    public:
+    bool closeStrings(string word1, string word2){
+        if(word1.length()!=word2.length()) return false;
+        const int char_nums = 26;
+        int word1_chars[char_nums] = {};
+        int word2_chars[char_nums] = {};
+        for(int i = 0 ; i < word1.length();i++){
+            int word1_char = word1[i] - 'a';
+            int word2_char = word2[i] - 'a';
+            word1_chars[word1_char]++;
+            word2_chars[word2_char]++;
+        }
+        for(int i = 0 ; i <char_nums ; i++){
+            if((word1_chars[i]&&!word2_chars[i])||(!word1_chars[i]&&word2_chars[i]))
+                return false;
+        }
+        sort(word1_chars,word1_chars + char_nums);
+        sort(word2_chars,word2_chars + char_nums);
+        for(int i = 0 ; i < char_nums ; i++){
+            if(word1_chars[i] != word2_chars[i])
+                return false;
+        }
+        for(int i = 0 ; i < char_nums ; i++){
+            cout<<word1_chars[i]<<' '<<word2_chars[i]<<endl;
+            
+        }
+        return true;
+    }
+};
+
+int main(){
+    Solution sol;
+    string word1 = "abc";
+    string word2 = "bca";
+    cout<<sol.closeStrings(word1,word2)<<endl;
+    word1 = "a";
+    word2 = "aa";
+    cout<<sol.closeStrings(word1,word2)<<endl;
+    word1 = "cabbba";
+    word2 = "abbccc";
+    cout<<sol.closeStrings(word1,word2)<<endl;
+    word1 = "uau";
+    word2 = "ssx";
+    cout<<sol.closeStrings(word1,word2)<<endl;
+    return 0;
+}
\ No newline at end of file