不用小数的做法！

#include <iostream>
using namespace std;
int main(){
	int fei = 0, x;
	int n;
	cin >> n;
	while(cin >> x){
		if(x % 70){
			fei += x / 70 + 1;
		}else fei += x / 70;
	}cout << fei / 10 << '.' << fei % 10;
	
	return 0;
}