#include<iostream> using namespace std; int main(){ int a,h=0,s; cin>>a; int b[a]={0}; for(int i=0;i<a;i++){ cin>>b[i]; if(b[i]>=70){ h++; s=(a*0.1)+(h*0.1); } } //char a; //cin>>a; //cout<<char(a+25); //cout<<"teacher:"<<'"'<<"I'm 25 years old"<<'"'<<endl; //cout<<2.5/**<<endl**/;//'9','A','Z','a','z' //cout<<int('0')<<" "<<int('9')<<" "<<int('A')<<" "<<int('Z')<<" "<<int('a')<<" "<<int('z'); printf("%.1f",s); return 0; }