String find C++

Problem Link: https://codeforces.com/problemset/problem/96/A
We can solve this problem using the string find() function.

#include<bits/stdc++.h>
using namespace std ;
int main()
{
    string s ;
    cin>>s;
    string s1 = "0000000";
    string s2 = "1111111";
    size_t found  = s.find(s1);
    size_t found1 = s.find(s2);
    if(found!=string::npos || found1!=string::npos){
        cout<<"YES"<<endl;
    }
    else {
        cout<<"NO"<<endl;
    }
    return 0;
}

here "size_t" is the signed integer data type. "size_t" can store the maximum size of a theoretical object of any type.
reference: https://en.cppreference.com/w/c/types/size_t
Here we check substring isfound or not in the given string.
Then if the string found then print Yes.

string::npos is a constant representing a non-position. it returns my function find when pattern was not found.