#include<iostream> #include<algorithm> #include<set> using namespace std; int main(){ string input; cin>>input; set<int> chars; for(auto ch: input){ if(ch >= 0 && ch <= 127){ chars.insert(ch); } } cout<<chars.size()<<endl; return 0; }
#include<iostream> #include<algorithm> #include<set> using namespace std; int main(){ string input; cin>>input; set<int> chars; for(auto ch: input){ if(ch >= 0 && ch <= 127){ chars.insert(ch); } } cout<<chars.size()<<endl; return 0; }