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POHow to get rid of this overflow error?
 

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  1. POHow to get rid of this overflow error?
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    <p>I am having a code, which gives incorrect output as i am working with big numbers. I want a solution to this that how could i improve this to accommodate big numbers. <strong>Which datatype i should use?</strong></p> <p>CODE:</p> <pre><code> static int get(int n,int i,int digit) { int p; p=(int)Math.pow(10,i-1); n=n/p; return n%10; } static boolean check_pal(int n) { int digit; digit=(int) (Math.log10(n)+1); int a=0,b=0,i,j,p; int sum=0; for(i=1,j=digit-1 ; i&lt;=digit ; i++,j-- ) { a=(int) get(n,i,digit); sum+=a*Math.pow(10,j); } if(sum==n) return true; else return false; } static int reverse(int n) { int digit; digit=(int) (Math.log10(n)+1); int a=0,b=0,i,j,p; int sum=0; for(i=1,j=digit-1 ; i&lt;=digit ; i++,j-- ) { a=(int) get(n,i,digit); sum+=a*Math.pow(10,j); } return n+sum; } public static void main(String[] args) { try{ Scanner sc=new Scanner(System.in); int n=sc.nextInt(); if(n&lt;10 || n&gt;999){ System.out.println("None"); return;} boolean c; for(int i=1 ; i&lt;=100 ; i++) { System.out.println("iteration"+i+" value is "+n); c=check_pal(n); if(c==true) { System.out.println(n); return; } n=reverse(n); } System.out.println("None"); } catch(Exception e) { System.out.println("NONE"); } } </code></pre> <p>Here is output: <img src="https://i.stack.imgur.com/Zt8mp.jpg" alt="output"></p> <p>In output, Iteration 17th get negative value this shows overflow. I want a solution so that this work for all inputs between 10 to 999.</p> <p>Here is problem definition <a href="http://www.codechef.com/problems/RBX1314" rel="nofollow noreferrer">click here !!</a></p>
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    1. USuser
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    1. COwhere is big int in your program?
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      1. POHow to get rid of this overflow error?
      1. USSatya
    2. COyou probably will need BigInteger but Long will give you a larger set of integers; up to 9.223372x10^18 without any other changes to your code
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      1. POHow to get rid of this overflow error?
      1. USRichard Tingle
 

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