diff --git a/1658_alllike/doc/Readme.md b/1658_alllike/doc/Readme.md
index b4f8d75..c49b881 100644
--- a/1658_alllike/doc/Readme.md
+++ b/1658_alllike/doc/Readme.md
@@ -1,3 +1,35 @@
-# 标题
+# 『入门』（函数专题）验证回文数的猜测
 
-* 内容
\ No newline at end of file
+[问题描述]  
+
+教学案例，必须使用函数完成求解！  
+
+　　左右对称的自然数称回文数。如121，4224，13731等，有人猜测：从任意一个两位或两位以上的自然数开始，将该数与它的逆序数（如1992的逆序数是2991）相加，得到一个新数，再用这个新数与它的逆序数相加，不断重复上述操作，经过若干步的逆序相加之后，总可以得到一个回文数，例如：从1992开始：  
+1992+2991=4983；   
+4983+3894=8877；   
+8877+7788=16665；   
+16665+56661=73326；   
+73326+62337=135663；   
+135663+366531=502194；   
+502194+491205=993399。   
+
+　　经过七步就得到了回文数。   
+　　设计一个程序，由计算机在局部范围内验证回文数的猜测，并将寻找回文数的每一个步骤都显示出来。10步内不能得到则直接输出"NO"   
+
+[输入格式]  
+　　一个整数（ 小于 10^5 ）。  
+
+[输出格式]
+　　10步内得到回文数，则输出得到的步数，否则输出“NO”。
+
+[输入样例]  
+1992
+
+[输出样例]  
+1992+2991=4983  
+4983+3894=8877  
+8877+7788=16665  
+16665+56661=73326  
+73326+62337=135663   
+135663+366531=502194  
+502194+491205=993399  
\ No newline at end of file
diff --git a/1658_alllike/main.cpp b/1658_alllike/main.cpp
index 988cea6..65b7b83 100644
--- a/1658_alllike/main.cpp
+++ b/1658_alllike/main.cpp
@@ -1,7 +1,72 @@
-#include <algorithm>
+#include <cstring>
 #include <iostream>
 using namespace std;
+int pan = 0, ans[11][10] = { 0 }, ce[11] = { 0 };
+void doit(int n[], int big)
+{
+    pan++;
+    ce[pan] = big;
+    if (pan == 11) {
+        cout << "NO";
+        return;
+    }
+    for (int i = 0; i < ce[pan]; i++) {
+        ans[pan][i] += n[i] + n[ce[pan] - i - 1];
+        ans[pan][i + 1] = ans[pan][i] / 10;
+        ans[pan][i] %= 10;
+    }
+    if (ans[pan][ce[pan]] != 0) {
+        ce[pan]++;
+    }
+    /*
+    for(int i=0;i<ce[pan];i++){
+        cout<<n[i];
+    }
+    cout<<"+";
+    for(int i=ce[pan]-1;i>=0;i--){
+        cout<<n[i];
+    }
+    if(ans[pan][ce[pan]]!=0){
+        ce[pan]++;
+    }
+    cout<<"=";
+    for(int i=ce[pan]-1;i>=0;i--){
+        cout<<ans[pan][i];
+    }
+    cout<<endl;*/
+    for (int i = 0; i < ce[pan] / 2; i++) {
+        if (ans[pan][i] != ans[pan][ce[pan] - i - 1]) {
+            //cout<<pan<<endl;
+            doit(ans[pan], ce[pan]);
+            return;
+        }
+    }
+    for (int i = 1; i  <= pan; i++) {
+        for (int j = ce[i-1] - 1; j >= 0; j--) {
+            cout << ans[i-1][j];
+        }
+        cout << "+";
+        bool u=0;
+        for (int j = 0; j < ce[i-1]; j++) {
+            if(u!=0||ans[i-1][j]!=0){
+                cout << ans[i-1][j];
+                u=1;
+            }            
+        }
+        cout << "=";
+        for (int j = ce[i] - 1; j >= 0; j--) {
+            cout << ans[i][j];
+        }
+        cout << endl;
+    }
+}
 int main()
 {
-    
+    string n;
+    cin >> n;
+    ce[0]=n.size();
+    for (int i = 0; i < ce[0]; i++) {
+        ans[0][ce[0]-i-1] = n[i] - '0';
+    }
+    doit(ans[0], ce[0]);
 }
diff --git a/1658_alllike/main.exe b/1658_alllike/main.exe
index fc4df42..2a06eaf 100644
Binary files a/1658_alllike/main.exe and b/1658_alllike/main.exe differ
diff --git a/1658_alllike/test/in.txt b/1658_alllike/test/in.txt
index e69de29..7730ef7 100644
--- a/1658_alllike/test/in.txt
+++ b/1658_alllike/test/in.txt
@@ -0,0 +1 @@
+89
\ No newline at end of file
diff --git a/1658_alllike/test/in2.txt b/1658_alllike/test/in2.txt
index e69de29..c7bd2db 100644
--- a/1658_alllike/test/in2.txt
+++ b/1658_alllike/test/in2.txt
@@ -0,0 +1 @@
+1993
diff --git a/1658_alllike/test/in3.txt b/1658_alllike/test/in3.txt
index e69de29..850e73f 100644
--- a/1658_alllike/test/in3.txt
+++ b/1658_alllike/test/in3.txt
@@ -0,0 +1 @@
+32767
\ No newline at end of file
diff --git a/1658_alllike/test/out.txt b/1658_alllike/test/out.txt
index 35a20e6..3a3d9b2 100644
--- a/1658_alllike/test/out.txt
+++ b/1658_alllike/test/out.txt
@@ -1,7 +1,29 @@
-## z:\Chao\src\Template\test\in.txt 
-2020/03/14 周六 11:41:28.68 
-Hello Easy C++ project!
+## z:\Chao\src\1658_alllike\test\in.txt 
+2020/04/24 周五 12:34:41.57 
+NO
+-----------------------------------------------
+Process exited after 250 ms with return value 0
+
+## z:\Chao\src\1658_alllike\test\in2.txt 
+2020/04/24 周五 12:34:41.57 
+1993+3991=5984
+5984+4895=10879
+10879+97801=108680
+108680+86801=195481
+195481+184591=380072
+380072+270083=650155
+650155+551056=1201211
+1201211+1121021=2322232
 
 -----------------------------------------------
-Process exited after 200 ms with return value 0
+Process exited after 80 ms with return value 0
+
+## z:\Chao\src\1658_alllike\test\in3.txt 
+2020/04/24 周五 12:34:41.57 
+32767+76723=109490
+109490+94901=204391
+204391+193402=397793
+
+-----------------------------------------------
+Process exited after 220 ms with return value 0