diff --git a/QUSTOJ/1735.c b/QUSTOJ/1735.c
new file mode 100644
index 0000000..9449f9e
--- /dev/null
+++ b/QUSTOJ/1735.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+ 
+/*
+int main()
+{
+    int a;
+    scanf("%d",&a);
+    a=((a/1000)+5)%10+(((a/100)+5)%10)*100+(((a/10)+5)%10)*10+((a+5)%10)*1000;
+    printf("%d\n",a);
+    return 0;
+}
+//*/
+void swap(char* a,char* b)
+{
+    char tmp=*b;
+    *b=*a;
+    *a=tmp;
+}
+char buff[512];
+int main()
+{
+    scanf("%s",buff);
+    for(int i=0;i<4;i++)
+    {
+        buff[i]+=5;
+        if(buff[i]>'9') buff[i]-=10;
+    }
+    swap(&buff[0],&buff[3]);
+    swap(&buff[1],&buff[2]);
+    printf("%s\n",buff);
+    return 0;
+}