a005. Eva 的回家作業 -- POJ | From: [140.129.108.162] | 發表日期 : 2013-04-16 11:19

import java.util.*;

class A005{

public static void main(String[] args){

Scanner s = new Scanner(System.in);

while(s.hasNext()){

int [] arr =new int [5];

int [] d =new int[3];

int [] r =new int[3];

for(int i=0;i<arr.length-1;i++){

arr[i]=s.nextInt();

if(arr[i]<0||arr[i]>20)

return;

}

for(int j=0;j<3;j++){

try{

d[j]=arr[j+1]-arr[j];

r[j]=arr[j+1]/arr[j];

}catch(ArrayIndexOutOfBoundsException e){}

}

if(d[0]==d[1]&&d[1]==d[2]){

arr[4]=d[0]+arr[3];

for(int i=0;i<=arr.length-2;i++){

System.out.print(arr[i]);

}

System.out.println(arr[4]);

}else if(r[0]==r[1]&&r[1]==r[2]){

arr[4]=r[0]*arr[3];

for(int i=0;i<=arr.length-2;i++){

System.out.print(arr[i]);

}

System.out.println(arr[4]);

}else{

return;

}

}

}

}