diff --git a/BestCoder/Round-80/1001.cpp b/BestCoder/Round-80/1001.cpp
new file mode 100644
index 0000000..c61d4ab
--- /dev/null
+++ b/BestCoder/Round-80/1001.cpp
@@ -0,0 +1,33 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+using namespace std;
+//
+int main()
+{
+    int t;
+    scanf("%d",&t);
+    while(t--)
+    {
+        int n;
+        scanf("%d",&n);
+        int tmp;
+        bool haveone=false;
+        bool havezero=false;
+        for(int i=0;i<n;i++)
+        {
+            scanf("%d",&tmp);
+            if(tmp==1) haveone=true;
+            else if(tmp==0) havezero=true;
+        }
+        if(haveone&&havezero)
+        {
+            printf("YES\n");
+        }
+        else
+        {
+            printf("NO\n");
+        }
+    }
+    return 0;
+}