diff --git "a/2101040022/chapter_10/\344\272\214\345\210\206\346\237\245\346\211\276.cpp" "b/2101040022/chapter_10/\344\272\214\345\210\206\346\237\245\346\211\276.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..d329b714b795af05c2f8c395ed30551b1fc04f6f
--- /dev/null
+++ "b/2101040022/chapter_10/\344\272\214\345\210\206\346\237\245\346\211\276.cpp"
@@ -0,0 +1,18 @@
+class Solution {
+public:
+    int search(vector<int>& nums, int target) {
+      int start = 0;
+      int end = nums.size() - 1;
+      while (start <= end) {
+        int mid = start + (end - start) / 2;
+        if (nums[mid] < target) {
+          start = mid + 1;
+        } else if (target < nums[mid]) {
+          end = mid - 1;
+        } else {
+          return mid;
+        }
+      }
+      return -1;
+    }
+};
\ No newline at end of file