diff --git a/QUSTOJ/1631.c b/QUSTOJ/1631.c
new file mode 100644
index 0000000..5140094
--- /dev/null
+++ b/QUSTOJ/1631.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char save[] = "`1234567890-=QWERTYUIOP[]\\ASDFGHJKL;\'ZXCVBNM,./";
+char maps[512];
+char data[512];
+
+int main()
+{
+	for ( int i = 1 ; save[i] ; ++ i )
+		maps[save[i]] = save[i-1];
+	
+	while ( gets(data) ) {
+		for ( int i = 0 ; data[i] ; ++ i )
+			if ( data[i] == ' ' || data[i] == '	' )
+				printf("%c",data[i]);
+			else printf("%c",maps[data[i]]);
+		printf("\n");	
+	}
+	return 0;
+}