#include <iostream>
using namespace std;
int main() {
double sum = 0;
for (int i = 2; i <= 45; i++) {
sum += i;
}
cout << sum / 44;
return 0;
#include <iostream>
using namespace std;
int main() {
double sum = 0;
for (int i = 2; i <= 45; i++) {
sum += i;
}
cout << sum / 44;
return 0;
}