Java 代码
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int n = sc.nextInt();
int ans = 0;
int count = 0;
while(n > 0) {
if(n % 2 == 1){
ans += Math.pow(a, count);
}
n >>= 1;
count++;
}
System.out.println(ans);
}
}