Split the binary string into substrings with equal number of 0s and 1s.cpp

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


int subString(string s){
    int n=s.length();
    int x=0,y=0,c=0;
    for(int i=0;i<n;i++){
        if(s[i]=='0')
            x++;
        else
            y++;
            if(x==y)
                c++;
            }
            if(x!=y)
                return -1;
                return c;
    
        
    
    
}

int main ()
{
   string s;
   cin>>s;
   cout<<subString(s)<<endl;
      
        
    
    //return 0;
}