diff --git a/GESP/GESP九月三级C++真题.pdf b/GESP/GESP九月三级C++真题.pdf
index cbc0d55..47a590b 100644
Binary files a/GESP/GESP九月三级C++真题.pdf and b/GESP/GESP九月三级C++真题.pdf differ
diff --git a/TangDou/51NOD/Test.cpp b/TangDou/51NOD/Test.cpp
index 3f93d02..6fa60e4 100644
--- a/TangDou/51NOD/Test.cpp
+++ b/TangDou/51NOD/Test.cpp
@@ -1,47 +1,23 @@
 #include <bits/stdc++.h>
 using namespace std;
-int sz;
-int dx;
-int xx;
-int ts;
-int jcq;
-string len;
-string str;
 int main() {
-    cin >> str;
-    for (int i = 0; i < str.size(); i++) {
-        if (str[i] == ',' || i == str.size() - 1) {
-            // check
-            /*
-            1,排除非法字符（看jcq)如果是，跳过。
-            2，长短限制：6~12
-            3，数字+大写+小写>=2，特殊》=1.
-            */
-            if (jcq > 0) continue;
-            if (len.size() < 6 || len.size() > 12) continue;
-            if (sz + dx + xx < 2) continue;
-            if (ts < 1) continue;
-            cout << len << endl;
-            // clear
-            sz = 0;
-            dx = 0;
-            xx = 0;
-            ts = 0;
-            len = "";
-            jcq = 0;
-        } else {
-            len += str[i];
-            if (str[i] <= '9' && str[i] >= '0') {
-                sz = true;
-            } else if (str[i] <= 'Z' && str[i] >= 'A') {
-                dx = true;
-            } else if (str[i] <= 'z' && str[i] >= 'a') {
-                xx = true;
-            } else if (str[i] == '!' || str[i] == '@' || str[i] == '#' || str[i] == '$') {
-                ts = true;
-            } else
-                jcq++;
-        }
+    int a = 10, b = 20;
+
+    cout << "a<<8=" << (a << 8) << endl;
+    int x = 2560;
+    // 101000000000
+    vector<int> q;
+    while (x) {
+        q.push_back(x % 2);
+        x /= 2;
     }
+    for (int i = q.size() - 1; i >= 0; i--) cout << q[i];
+    cout << endl;
+
+    a = (a << 8) | b;
+
+    b = a >> 8;
+    a = a & 0xff;
+    cout << a << " " << b << endl;
     return 0;
 }
\ No newline at end of file