“CodeForces/390B”的版本间的差异

import java.io.*;
import java.math.*;
import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner cin = new Scanner(new BufferedInputStream(System.in));
        int n;
        BigInteger a[]=new BigInteger[100010],ans=BigInteger.ZERO;
        n=cin.nextInt();
        for(int i=1;i<=n;++i)
        	a[i]=cin.nextBigInteger();
 
        for(int i=1;i<=n;++i)
        {
            BigInteger b=cin.nextBigInteger();
            if(a[i].multiply(BigInteger.valueOf(2)).compareTo(b)>=0 &&
               b.compareTo(BigInteger.ONE)>0)//fixed:b>1//
                ans=ans.add(b.divide(BigInteger.valueOf(2))
                .multiply((b.add(BigInteger.ONE)).divide(BigInteger.valueOf(2))));
            else
                ans=ans.subtract(BigInteger.ONE);
        }
        System.out.println(ans);
        return;
    }
}