/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
int a[]={1,2,3,4,5,6,7,8,9,10};
int i,s=0;
for(i=0;i<9;i+=2){
s= s + (a[i]++) - (++a[9-i]);
}
}
}
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