diff --git a/HDOJ/5842_lyhylex.cpp b/HDOJ/5842_lyhylex.cpp
new file mode 100644
index 0000000..56015ae
--- /dev/null
+++ b/HDOJ/5842_lyhylex.cpp
@@ -0,0 +1,19 @@
+///好厉害~！来自lyhylex (CSDN)
+#include <cstdio>
+#include <cstring>
+#include <algorithm>
+using namespace std;
+char s[100000 + 9];
+int main()
+{
+	int ca = 1, t;
+	scanf("%d", &t);
+	while (t--)
+	{
+		scanf("%s", s);
+		int n = strlen(s);
+		sort(s, s + n);
+		printf("Case #%d: %d\n", ca++, unique(s, s + n) - s);
+	}
+	return 0;
+}