#include<iostream> #include<iomanip> using namespace std; int main() { int a[101]={},n1=0,n2=0,n3=0,n4=0,n; cin>>n; for(int i=0;i<n;i++){ cin>>a[i]; if(a[i]>0&&a[i]<=18)n1++; if(a[i]>=19&&a[i]<35)n2++; if(a[i]>=36&&a[i]<60)n3++; if(a[i]>=61)n4++; } cout<<fixed<<setprecision(2)<<n1*1.0/n*100<<"%"; return 0; }