Find CB number- please

#1 
#include <bits/stdc++.h>
using namespace std;

bool mycompare(string a,string b){
return a.length()<b.length();
}

bool checkcb(string s,int* number){
if(s == "0" || s== "1"  ){
    return false;
}
else if(s=="2"||s=="3"||s=="5"||s=="7"||s=="11"||s=="13"||s=="17"||s=="19"||s=="23"||s=="29"){
    return true;
}
int x=stoi(s);
for(int i=0;i<10;i++){
    if((x%number[i]) == 0){
        return false;
    }
}
return true;
}
bool ans[10]={false};
bool isvalid(string s){
int x=stoi(s);
while(x!=0){
    int temp=x%10;
    if(ans[temp]==1){
        return false;
    }
    x=x/10;
}
return true;
}
int main(){
   int n;
   cin>>n;
   string s;
   cin>>s;
   vector<string>v ;
for (int i = 0; i < n; i++){ 
    for (int len = 1; len <= n-i; len++){
        v.push_back(s.substr(i, len));
    }
}
sort(v.begin(),v.end(),mycompare);
 
int number[]={2,3,5,7,11,13,17,19,23,29};
int count=0;
for(int i=0;i<v.size();i++){
    if(checkcb(v[i],number) && isvalid(v[i])){
        count++;
        //cout<<v[i]<<endl;
        int x=stoi(v[i]);
        while(x!=0){
        int temp=x%10;
        ans[temp]=1;
        x=x/10;
                    }
        
    }
  
}
    cout<<count<<endl;

	return 0;
}

can anyone please help correct my code, I think I am logically correct, by first sorting the substrings in increasing order and then checking its validity, but it is not working.!

#2


This is the code you can refer to for your solution, explanation is present in the beginning of code, kindly use it for your reference solution

#3

@yuktimutreja01

hey, please tell the mistake in my code. i am following the same approach but getting wrong ans.