C :

#include <stdio.h>
#include <math.h> 
int main ()
{
	int n,m;
	scanf("%d%d",&n,&m);
	long long num=pow(n,n+1)-(n-1)*m;
	printf("%lld",num);
	return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	int monkey,apple;
	long long int sum;
	cin>>monkey>>apple;
	sum=pow(monkey,monkey+1)-(monkey-1)*apple;
	cout<<sum<<endl;
    return 0;
}

Java :

import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int m=sc.nextInt();
        long ans=(long)Math.pow(n, n+1)-(n-1)*m;
        System.out.println(ans);

    }

}