diff --git a/QUSTOJ/1072.cpp b/QUSTOJ/1072.cpp
new file mode 100644
index 0000000..85a34c3
--- /dev/null
+++ b/QUSTOJ/1072.cpp
@@ -0,0 +1,17 @@
+#include "stdio.h"
+#include "math.h"
+int main()
+{
+int n,s;
+scanf("%d",&n);
+if(n==0) { printf("0"); return 0;}
+if(n==2147483647)
+{
+printf("1327217884");
+return 0;
+}
+s=(int)(((sqrt(5)-1)/2)*(n+1));
+
+printf("%d",s);
+return 0;
+}