vector的find用法[通俗易懂]

#include<vector>
#include<algorithm>
#include<iostream>
using namespace std;
int main()
{
      vector<int>L;
      L.push back(1)；
      L.push back(2);
      L.push back(3);
      vector<int>::iterator it=find(L.begin(),L.end(),3);
      if(it==L.end())
            cout<<"NO"<<endl;
       else 
             cout<<"YES"<<endl;
   }