diff --git a/QUSTOJ/1856.cpp b/QUSTOJ/1856.cpp
new file mode 100644
index 0000000..bab9803
--- /dev/null
+++ b/QUSTOJ/1856.cpp
@@ -0,0 +1,43 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <algorithm>
+#include <vector>
+using namespace std;
+vector<int> a;
+int main()
+{
+    int t;
+    scanf("%d",&t);
+    int tmp;
+    for(int i=0;i<t;i++)
+    {
+        scanf("%d",&tmp);
+        a.push_back(tmp);
+    }
+    int id;
+    int val;
+    scanf("%d %d",&id,&val);
+    if(id<1||id>(int)a.size()+1)
+    {
+        printf("对不起，插入位置错误！\n");
+        return 0;
+    }
+    a.insert(a.begin()+id-1,val);
+    for(int i=0;i<(int)a.size()-1;i++)
+    {
+        printf("%d ",a.at(i));
+    }
+    printf("%d\n",a.at(a.size()-1));
+    return 0;
+}
+/*
+5
+2 4 6 8 10
+7 2
+
+8
+1 2 3 4 5 6 7 8
+7 9
+
+*/