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題目概要：
計算出微分後的數字。
解題方向：
直接依微分的方式打成程式碼。
Ps. Uva OnlineJudge 輸入x之後所輸入的係數可能會有連續空白 Ex 1△2△3△△4....(△=空白)，因為我這個問題runtime error(RE)很多次。
程式碼：
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| //Java | |
| import java.util.Scanner; | |
| class main{ | |
| public static void main(String args[]){ | |
| Scanner sc=new Scanner(System.in); | |
| while(sc.hasNextLine()){ | |
| long x=Long.parseLong(sc.nextLine()); | |
| String an[]=sc.nextLine().split("\\s+"); //跳過多個空白鍵 | |
| long ans=0; | |
| long xp=1; | |
| for(int i=an.length-2;i>=0;i--,xp*=x){ | |
| ans+=Long.parseLong(an[i])*(an.length-1-i)*xp; //微分計算 | |
| } | |
| //Output | |
| System.out.println(ans); | |
| } | |
| } | |
| } |
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