diff --git a/QUSTOJ/1110.cpp b/QUSTOJ/1110.cpp
new file mode 100644
index 0000000..4ceebbd
--- /dev/null
+++ b/QUSTOJ/1110.cpp
@@ -0,0 +1,10 @@
+#include <iostream>
+
+int main(){
+    long long re,n;
+    std::cin>>n;
+    re=n*(n+1)*(2*n+1);
+    re/=6;
+    std::cout<<re;
+    return 0;
+}