Morris' Blog

2012-07-09 20:13:01Morris

[UVA][Java] 10494 - If We Were a Child Again

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Problem C

If
We Were a Child Again
Input: standard input

Output: standard output
Time Limit: 7 seconds
 

 
  “Oooooooooooooooh!
If I
  could do the easy mathematics like my school days!!
I can
  guarantee, that I’d not make any mistake this time!!”
Says
  a smart university student!!
But
  his teacher even smarter – “Ok! I’d assign you such projects in your software
  lab. Don’t be so sad.”
“Really!!”
  - the students feels happy. And he feels so happy that he cannot see the
  smile in his teacher’s face.
 
 

  
  
  
 

  The Problem
 
The
  first project for the poor student was to make a calculator that can just
  perform the basic arithmetic operations.
 
But
  like many other university students he doesn’t like to do any project by
  himself. He just wants to collect programs from here and there. As you are a
  friend of him, he asks you to write the program. But, you are also
  intelligent enough to tackle this kind of people. You agreed to write
  only the (integer) division and mod (% in C/C++) operations for him.

 

   
Input
Input is a sequence
  of lines. Each line will contain an input number. One or more spaces. A sign
  (division or mod). Again spaces. And another input number. Both the input
  numbers are non-negative integer. The first one may be arbitrarily long. The
  second number n will be in the range (0 < n < 231).

 

   
 OutputA
  line for each input, each containing an integer. See the sample input and
  output. Output should not contain any extra space.

 

   
  Sample
  Input110 / 100
99 % 10
2147483647 /
  2147483647
2147483646 % 2147483647

   
 
 
 

 

    Sample
  Output1
9
1
2147483646

   

 

   

   

   

 



import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        BigInteger a, b;
        while(cin.hasNext()) {
            a = new BigInteger(cin.next());
            char tmp = cin.next().charAt(0);
            b = new BigInteger(cin.next());
            String res = "";
            switch(tmp) {
            case '+':
                res = a.add(b).toString();
                break;
            case '-':
                res = a.subtract(b).toString();
                break;
            case '*':
                res = a.multiply(b).toString();
                break;
            case '/':
                res = a.divide(b).toString();
                break;
            case '%':
                res = a.mod(b).toString();
            }
            System.out.println(res);
        }
    }
}