cíu mik với mik cần gấp lắm ạ C++

#include<bits/stdc++.h>

using namespace std;
#define int long long

signed main(){
    string a,b;
    cin >> b;
    cin >> a;

    int cur = 0;
    int ans = 0;
    string tmp = "";
    for(int i = 0;i < b.size();i++){
            if(b[i] == a[cur]){
                cur++;
                tmp+= b[i];
            }

            if(tmp == a){
                cur = 0;
                tmp = "";
                ans++;
            }
    }
    cout << ans;


}

link submit cua minh nhe: lqdoj.edu.vn/submission/4127665

#include<bits/stdc++.h>
#define ll long long
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#pragma GCC optimize("O3","unroll-loops")
#pragma GCC optimize("Ofast")
using namespace std;
ll dem(string b, string a)
{
    ll d=0;
    ll p=0;
    while((p=b.find(a,p))!=string::npos)
    {
        d++;
        p+=a.length();
    }
    return d;
}
int main()
{
    ios
    string b,a;
    cin>>b>>a;
    ll s=dem(b,a);
    cout<<s;
    return 0;
}