diff --git a/check cases b/check cases
new file mode 100644
index 0000000..a4b1e6b
--- /dev/null
+++ b/check cases	
@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+
+int main() {
+	char c;
+    cin>>c;
+    
+    if(c>='A' && c<='Z'){
+        cout<<1<<endl;
+    }else if ( c>='a' && c<='z'){
+        cout<<0<<endl;
+    }else{
+        cout<<-1<<endl;
+    }
+	
+}