04. Credit System

#include <iostream>
#include <iomanip>
unsigned long long int krediti[11];
double getKr[11];
unsigned long long int ocenka[11];
using namespace std;
int main() {
int n;string s; cin>>n;
double sum=0.0;
int ocenki=0.0;
for(int i=0;i<n;i++) {
  cin>>s;
  for(int j=0;j<=s.size()-2;j++)
  {
    krediti[i]*=10; krediti[i]+=(int)s[j]-48;
  }
  ocenka[i]=(int)(s[s.size()-1]-48);
}
for(int i=0;i<n;i++) {
  if(ocenka[i]==2) getKr[i]=0;
  if(ocenka[i]==3) getKr[i]=(double)(krediti[i]/2);
  if(ocenka[i]==4) getKr[i]=(double)(krediti[i]*(70.0/100.0));
  if(ocenka[i]==5) getKr[i]=(double)(krediti[i]*(85.0/100.0));
  if(ocenka[i]==6) getKr[i]=(double)(krediti[i]);
  sum+=getKr[i];
  ocenki+=ocenka[i];
}
cout<<fixed<<setprecision(2)<<sum;
cout<<endl<<fixed<<setprecision(2)<<(double)ocenki/n;
cout<<endl;
  return false;
}