#include <stdio.h>
int fuga(int x,int y){
	if(y==0){
		return 1;
	}
	else{
		return fuga(x,y-1)*x+1;
	}
}
int main(void) {
	int x,y;
	scanf("%d%d", &x,&y);
	printf("%d", fuga(x,y));
	return 0;
}