老谢博客

#include<iostream>
#include<algorithm>
#include<vector>
 
using namespace std;
int main()
{
 vector <int> vls;
 int number=10,size,size2; 
for (int temp,i=0;i<number;i++)
  {
   cin>>temp;
   vls.push_back(temp);
}
size=vls.size();
sort(vls.begin(),vls.end());
vector <int>::iterator viter=unique(vls.begin(),vls.end()); 
vls.erase(viter,vls.end());
size2=vls.size();
if(size==size2)
   cout<<"YES";
  else
   cout<<"NO";
return 1;
}