#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int a,b;
unordered_set <int> s;
b = 10;
s.insert(6);
s.insert(8);
s.insert(b);
cout<<"find:";
cin>>a;
if(s.find(a)!=s.end())
cout<<"Found"<<a<<b;
else
cout<<"not found";
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8Yml0cy9zdGRjKysuaD4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkgewoJLy8geW91ciBjb2RlIGdvZXMgaGVyZQoJaW50IGEsYjsKCXVub3JkZXJlZF9zZXQgPGludD4gczsKCWIgPSAxMDsKCXMuaW5zZXJ0KDYpOwoJcy5pbnNlcnQoOCk7CglzLmluc2VydChiKTsKCWNvdXQ8PCJmaW5kOiI7CgljaW4+PmE7CglpZihzLmZpbmQoYSkhPXMuZW5kKCkpCgljb3V0PDwiRm91bmQiPDxhPDxiOwoJZWxzZQoJY291dDw8Im5vdCBmb3VuZCI7CglyZXR1cm4gMDsKfQo=