NZEC in CSUB

1

https://www.codechef.com/viewsolution/30894092

I used recursion to count the required substrings

Can someone have a look at my code and tell what is wrong

2

looks like you have to change class name to Main().
i am not sure but most likely this would be the error.

3

On my machine, your solution fails on this testcase with the following error:

Exception in thread "main" java.lang.StackOverflowError
        at java.base/java.lang.StringLatin1.newString(StringLatin1.java:715)
        at java.base/java.lang.String.substring(String.java:1846)
        at Ideone.CountSubstrings(lynton_1765-CSUB.java:24)
        at Ideone.CountSubstrings(lynton_1765-CSUB.java:24)
... the last couple of lines repeated over and over ...
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4

So is there a problem in my approach or it is something else

5

Can you please tell how do you test on which tc it gives WA/TLE?

6

Probably something like this

Tester.cpp 
#include <iostream>
#include <bits/stdc++.h>
#include <stdlib.h>
#include <cmath>
#include <vector>
#define ll long long int
#define mp make_pair
#define pb push_back
#define vi vector<int>
using namespace std;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    bool correct=1;
    while(correct){
        //Generate tc
        FILE *input1=freopen("input1.txt","w",stdout);
        //Put Tc in file 1
        fclose(input1);
        FILE *input2=freopen("input2.txt","w",stdout);
       // Put Tc in file 2
        fclose(input2);
        system("C:\\Users\\Public\\correct.exe");
        system("C:\\Users\\Public\\mine.exe");
        FILE *correct=freopen("output1.txt","r",stdin);
        //input correct answer
        fclose(correct);
        FILE *mine=freopen("output2.txt","r",stdin);
        //input my answer
        fclose(mine);
        if(//check answer){
            FILE *wrong=freopen("wrong.txt","w",stdout);
            //Write wrong answer here
            fclose(wrong);
            break;
        }
    }
}
correct.cpp 
#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <vector>
using namespace std;
ll solve(){

}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    FILE *input=freopen("input1.txt","r",stdin);
    FILE *output=freopen("output1.txt","w",stdout);
    solve();
    cout<<endl;
    fclose(input);
    fclose(output);
}
mine.cpp 
#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <vector>
ll solve(){

}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    FILE *input=freopen("input2.txt","r",stdin);
    FILE *output=freopen("output2.txt","w",stdout);
    solve();
    cout<<endl;
    fclose(input);
    fclose(output);

}
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