uva 10014 - Simple calculations
数列递推,求出公式计算按要求输出即可。
代码 :
import java.util.*; public class Main10014 { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int t = scan.nextInt(); while(t-- > 0) { int n = scan.nextInt(); double a0 = scan.nextDouble(); double an = scan.nextDouble(); double c, sum = 0; for(int i=0; i<n; i++) { c = scan.nextDouble(); sum += (n-i)*c; } System.out.printf("%.2f\n",((n * a0 + an - 2 * sum) / (n + 1))); if(t != 0) System.out.println(); } } }
作者:Pickle
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