what is wrong in this
#include
#include
using namespace std;
int cnt=0;
void count(){
cnt++;
}
void subsequences(string str,int i,int j,vectorv){
if(str[i]=='\0'){
v.push_back('\0');
count();
for(auto x:v){
cout<<x;
}
return;
}
subsequences(str,i+1,j,v);
v.push_back(str[i]);
subsequences(str,i+1,j+1,v);
}
int main() {
string str;
cin>>str;
vectorv;
subsequences(str,0,0,v);
cout<<endl<<cnt;
return 0;
}