diff --git a/Codechef/MCUBES.cpp b/Codechef/MCUBES.cpp
new file mode 100644
index 0000000..29b6b78
--- /dev/null
+++ b/Codechef/MCUBES.cpp
@@ -0,0 +1,32 @@
+// https://www.codechef.com/problems/MCUBES
+
+#include<bits/stdc++.h>
+using namespace std;
+int main()
+{
+	long long n,temp,res=0;
+	cin>>n;
+	vector<int> a;
+	
+	for(int i=0 ; i<n ; i++)
+	{
+		cin>>temp;
+		a.push_back(temp);
+	}
+	bool flag=true;
+	for(int i=n-1 ; i>0 ; i--)
+	{
+		if(a[i]!=a[i-1])
+		{
+			res = i+1;
+			flag=false;
+			break;
+		}
+	}
+	if(flag)
+		cout<<"1\n";
+	else
+		cout<<res<<"\n";
+	
+	return 0;
+}
\ No newline at end of file