#include using namespace std; int main() { string s; | Code With Virus
#include using namespace std;
int main() { string s; cin >> s; int ans = 0; map m; for (int i = 0; i < s.size(); i++) { m[s[i]]++; } for (auto x : m) { if (x.second == 1) ans++; } cout << ans; return 0; }
