#include<bits/stdc++.h> using namespace std; int dem(string s) { int dem=0; for (int i=0;i<s.length();i++) { if (s[i]=='8') dem+=2; else if (s[i]=='0'||s[i]=='4'||s[i]=='6'||s[i]=='9') dem++; } return dem; } int main() { string s; cout<<"Nhap N: "; cin>>s; cout<<"So lo hong la: "<<dem(s); }
