Find All Anagrams in a String

class Solution {
    
public:
    vector<int> findAnagrams(string s, string p) {
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        
        vector<int> ans;
        vector<int> hash(26,0);
        vector<int> phash(26,0);
        int window = p.size();
        int len = s.size();
        if(len<window)
            return ans;
        int left = 0,right = 0;
        while(right<window)
        {
            phash[p[right]-'a'] +=1;
            hash[s[right++]-'a'] +=1;
        }
        right -=1;
        while(right<len)
        {
            if(phash == hash)
                ans.push_back(left);
            right+=1;
            if(right!=len)
                hash[s[right]-'a'] +=1;
            hash[s[left]-'a'] -=1;
            left+=1;
        }
        return ans;
    }
};

I always wonder what is the meaning of these lines ::-->>>

ios_base::sync_with_stdio(false);
cin.tie(NULL);

please explain

These for streams in C++. Please read on it by searching. That will be best :)

…

On Sat, 19 Sep, 2020, 11:20 am Nikhil Sachan, ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ I always wonder what is the meaning of these lines ::-->>> ios_base::sync_with_stdio(false); cin.tie(NULL); please explain — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/93905c88c3e23477e4c3451d0db90a82#gistcomment-3459637>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG73U3IRRZPUFS7DI3FE77LSGRBBNANCNFSM4RS2I3JA> .

best advice.