diff --git a/QUSTOJ/1448.cpp b/QUSTOJ/1448.cpp
new file mode 100644
index 0000000..7e1e87c
--- /dev/null
+++ b/QUSTOJ/1448.cpp
@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main()
+{
+    int all,rep,i,ans;
+    scanf("%d",&all);
+    for(;all>0;all--)
+    {
+        scanf("%d",&rep);
+        ans=3;
+        for(i=0;i<rep;i++)
+        {
+            ans=(ans-1)*2;
+        }
+        printf("%d\n",ans);
+    }
+    return 0;
+}