解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); double s = sc.nextDouble(); double begin; double sum = 0; double numbers = 1; while (sum != s) { numbers++;//numbers==5 begin = numbers;//begin==5 sum = begin;//sum==5 for (int i = 0; i < n; i++) { sum = sum + begin * 2 - 1;//sum==5+9=14 sum==14+17==31 begin = begin * 2 - 1;//begin==9 begin==17 } } System.out.println((int) numbers); } }
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