#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int main()
{
    long int n,k,val,fact=1,coeff=0;

    char ch[24],*num,*excl;

    gets(ch);

    num=strtok(ch," ");
    n=atoi(num);

    excl=strtok(NULL,NULL);
    k=strlen(excl);

    while(coeff*k<n)
    {
        val=n-coeff*k;
        fact=fact*val;
        coeff++;
    }


    if(n%k!=0)
        fact=fact*(n%k);
    else fact=fact*k;

    printf("%ld",fact);

    return 0;
}


Hi! I am getting runtime error(access violation) although the solution seems to work for different set of inputs. Please help me out!

http://ideone.com/1tNjl7
I have corrected your solution.
Even if fix Access violation,
You are just WA#5
(Because of a logic error)

Edited by author 21.07.2017 00:59

Hi Mahilewets! Thanks a lot! I did correct the "Runtime error" but was getting a "Wrong answer" error due to the error in logic in the while condition. Your's is the right one.
Just a query though(pardon my ignorance as I am new to this kind of stuff). How do you find the test cases for each problem apart from the one already given?

https://www.quora.com/How-do-I-create-random-big-testcases-for-testing-by-Python-script-for-competitive-programming

One way to do that is to use random