diff --git a/QUSTOJ/1407.c b/QUSTOJ/1407.c
new file mode 100644
index 0000000..fb6eacd
--- /dev/null
+++ b/QUSTOJ/1407.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+int main()
+{
+    long inc;
+    if(scanf("%d",&inc)!=1)
+    {
+        return -1;
+    }
+    else
+    {
+        long i,cur;
+        for(cur=2;cur<=inc;cur++)
+        {
+            for(i=2;i<cur;i++)
+            {
+                if(cur%i==0)
+                {
+                    break;
+                }
+            }
+            if(i==cur)
+            {
+                printf("%d ",cur);
+            }
+        }
+        printf("\n");
+    }
+    return 0;
+}