cses

distinct_numbers.cpp (477B)

---

 #include <bits/stdc++.h>
 
 using namespace std;
 
 using ui = unsigned int;
 using l = long;
 using ul = unsigned long;
 using ll = long long;
 using ull = unsigned long long;
 
 using vi = vector<int>;
 using vui = vector<ui>;
 using vl = vector<l>;
 using vul = vector<ul>;
 using vll = vector<ll>;
 using vull = vector<ull>;
 
 void solve()
 {
 	int n;
 	set<int> s;
 	cin >> n;
 	while (n--) {
 		int tmp;
 		cin >> tmp;
 		s.insert(tmp);
 	}
 	cout << s.size() << "\n";
 }
 
 int main()
 {
 	solve();
 }