There was a similar coding question at hacker earth. The challenge ends now. I don't have that question now but my code looked like this. I passed the test cases but my code was not accepted due to large input gives this error.  I have written the following code.  import java.util.*; class TripleStep{     public static void main(String[] args){         Scanner in=new Scanner(System.in);         int n=10000;         long[] memo=new long[n+1];         Arrays.fill(memo,-1);         long ans=StairOpr(n,memo);         Arrays.fill(memo,-1);         System.out.println(ans);     }     public static long StairOpr(int n,long[] memo){         if(n&lt;0){             return 0;         }         else if(n==0){             return 1;         }         else if(n==1){             return 2;         }          else if(n==2){             return 3;         }         else if(memo[n]&gt;-1){             return memo[n];         }         else             memo[n]= (StairOpr(n-1,memo)%1000000007+StairOpr(n-2,memo)%1000000007+StairOpr(n-3,memo)%1000000007+n*n*(n+1)%1000000007)%1000000007;             return memo[n];     } }   The code gives me the following error for the input value 10000.  Exception in thread "main" java.lang.StackOverflowError     at TripleStep.StairOpr(TripleStep.java:31)     at TripleStep.StairOpr(TripleStep.java:31)   What is the reason and what would be the solution? Since I write dynamic programming code but due to error the answer is not Submitted and I face the rejection.
What is a StackOverflowError, what causes it, and how should I deal with them?
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