diff --git "a/2101040022/chapter_8/\346\211\276\345\210\260\345\260\217\351\225\207\347\232\204\346\263\225\345\256\230.cpp" "b/2101040022/chapter_8/\346\211\276\345\210\260\345\260\217\351\225\207\347\232\204\346\263\225\345\256\230.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..e3a210db3ce24949acdd544e75908ebad695a382
--- /dev/null
+++ "b/2101040022/chapter_8/\346\211\276\345\210\260\345\260\217\351\225\207\347\232\204\346\263\225\345\256\230.cpp"
@@ -0,0 +1,22 @@
+class Solution {
+private:
+    int arr[1001];
+    int brr[1001];
+public:
+    int findJudge(int n, vector<vector<int>>& trust) {
+        for (int i = 0; i < trust.size(); i++) {
+            arr[trust[i][0]]++;
+            brr[trust[i][1]]++;
+        }
+        int cnt = 0;
+        int index = 0;
+        for (int i = 1; i <= n; i++) {
+            if (arr[i] == 0 && brr[i] == n - 1) {
+                cnt++;
+                index = i;
+            }
+        }
+        if (cnt == 1) { return index; }
+        else { return -1; }
+    }
+};
\ No newline at end of file