diff --git a/QUSTOJ/1516.cpp b/QUSTOJ/1516.cpp
new file mode 100644
index 0000000..a84f256
--- /dev/null
+++ b/QUSTOJ/1516.cpp
@@ -0,0 +1,35 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <sstream>
+using namespace std;
+int cnt[1005];
+int main()
+{
+    int n,tmp;
+    while(scanf("%d",&n)==1&&n!=0)
+    {
+        memset(cnt,0,sizeof(int)*1005);
+        for(int i=0;i<n;i++)
+        {
+            scanf("%d",&tmp);
+            ++cnt[tmp];
+        }
+        int c=0;
+        ostringstream ostr;
+        for(int i=0;i<1005;i++)
+        {
+            if(cnt[i])
+            {
+                ++c;
+                ostr<<i<<" ";
+            }
+        }
+        printf("%d\n",c);
+        string ans=ostr.str();
+        ans.replace(ans.begin()+ans.size()-1,ans.end(),"\0");
+        printf("%s\n\n",ans.c_str());
+    }
+    return 0;
+}
+ 
diff --git a/QUSTOJ/1520.cpp b/QUSTOJ/1520.cpp
new file mode 100644
index 0000000..d4c5507
--- /dev/null
+++ b/QUSTOJ/1520.cpp
@@ -0,0 +1,19 @@
+#include <cstdio>
+int cnt[26];
+
+int main()
+{
+    char c;
+    while((c=fgetc(stdin))!='#')
+    {
+        if(c>='a'&&c<='z')
+        {
+            ++cnt[c-'a'];
+        }
+    }
+    for(int i=0;i<26;i++)
+    {
+        printf("%c %d\n",i+'a',cnt[i]);
+    }
+    return 0;
+}