diff --git a/catfeed.cpp b/catfeed.cpp
new file mode 100644
index 0000000..b906c24
--- /dev/null
+++ b/catfeed.cpp
@@ -0,0 +1,35 @@
+#include<bits/stdc++.h>
+#define ll long long
+using namespace std;
+
+int main()
+{
+    ll t;
+    cin>>t;
+    while(t--)
+    {
+        ll n,m,f=0,x;
+        cin>>n>>m;
+        vector<ll> v(n,0);
+        // v.clear();
+        ll i,prev;
+        for(i=0;i<m;i++)
+        {
+            cin>>x;
+            prev=i/n;
+            // cout<<prev<<" ";
+            if(v[x-1]==prev)
+                v[x-1]++;
+            else
+            {
+                f=1;
+                // break;
+            }
+        }
+        if(f==1)
+            cout<<"NO"<<endl;
+        else
+            cout<<"YES"<<endl;
+    }
+	return 0;
+}
\ No newline at end of file