Finding the cb numbersa

#1

#include
using namespace std;

bool iscb(int num)
{
int arr[10]={2,3,5,7,11,13,17,19,23,29};

if(num==0||num==1)
return false;

for(int i=0;i<10;i++)
{
	if(num%arr[i]==0)
	return false;
}

return true;

}

int main()
{
int n;
cin>>n;

string s;
cin>>s;

int count =0;
int i=0;

while(i<n)
{
int a=s[i]-‘0’;
if(iscb(a))
{
i++;
count++;
}

	else
	 {
	 	while(!iscb(a))
	 	{
	 		i++;
	 		int b=s[i]-'0';
	 		a=a*10+b;
	 		
		}
		i++;
		count++;
	 }

}

cout<<count;

return 0;

}

what is wrong in the code

#2

Hi!
In this question, you also have to make sure that the digit should not be a part of any CB number before. So write a function for that as well

#3

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