diff --git a/GESP/GESP2024年3月4级.pdf b/GESP/GESP2024年3月4级.pdf
index 0513f18..bb72986 100644
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diff --git a/GESP/GESP九月四级C++真题.pdf b/GESP/GESP九月四级C++真题.pdf
index c9e841f..651e942 100644
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diff --git a/GESP/做题.cpp b/GESP/做题.cpp
new file mode 100644
index 0000000..1c9e758
--- /dev/null
+++ b/GESP/做题.cpp
@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 1e6 + 10;//�ⵥ��������
+int a[N];//ÿ���ⵥ������������
+
+int main() {
+	int n;
+	cin >> n;
+	for (int i = 1; i <= n; i++)
+		cin >> a[i];
+	sort(a + 1, a + 1 + n);
+
+	int h = 1;//������󣬴��Ƚϵ��ⵥ��
+	for (int i = 1;;) { //ö��ÿһ�죬����breakֹͣ
+		if (a[h] >= i)  //�����������ߵ�һ��
+			i++;
+		if (++h > n) {
+			cout << i - 1  << endl;
+			break;
+		}
+	}
+	return 0;
+}