Create Ai.cpp

Author: sankalp088

Ai.cpp

@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int main() {
+	// your code goes here
+	long long int n;
+	cin>>n;
+	long long int count=0;
+	long long int arr[n-1];
+	for(int i=0;i<n-1;i++)
+	{
+		cin>>arr[i];
+		count=count+arr[i];
+	}
+	cout<<(n*(n+1)/2)-count;
+	return 0;
+}