OJ Board

[java]import java.io.*;
import java.util.*;

class Main
{
public static String readln(int len)
{
byte lin[]=new byte[len];
int lg=0, car=-1;
try
{
while(lg<len)
{
car=System.in.read();
// if(lg==0&&(car=='\r')||(car=='\n')) continue;
// if((car<0)||(car=='\r')||(car=='\n')) break;
if((car ...

If you cast from double to int (or long) such a big integer, only first 13-14 digits will be right.

In this situlation, you should emulate big integer operation; separate big integer and story at array of integer (for example, store 8 digits per one space of array).

Then, you should implement ...

double is right, but real number can't be used in Problem #113 . Problem #113 should be solved ONLY with integer.

There is a class that supports such a big integer: java.math.BigInteger; but there is a problem:

This class isn't supproted yet in the judge compiler; (I think) judge compliler ...

In windows, "\r\n" means new line while "\n" in Linux

Because of that, At first time I got some of [WA] signal when I posted my JAVA program.

In Windows, I have to change readln() just like this
[java]while(lg<len)
{
car=System.in.read();
if(lg==0&&(car=='\r')||(car=='\n')) continue;
if((car ...