include

include

using namespace std; int main(){

int n,a;
cin >> n;
a = n*2+4-1;
cout << fixed << setprecision(1)<< a*100.0/(n*n) << "%";	
return 0;

}

include

include

using namespace std; int main(){

int n;
cin >> n; 
cout <<fixed<<setprecision (1) << (2*n+3)*100.0/(n*n)<<"%";
return 0;

}

n=int(input()) x=100((n+n+3)/(nn)) y=f"{x:.1f}" z=y+"%" print(z)

include <bits/stdc++.h>

using namespace std; int main(){

int n;
cin >> n;
cout << fixed << setprecision(1) << (2*n+3)*100.0/(n*n) << "%";
return 0;

}

#python3解法:


n=int(input())
f=4+n+(n-1)
n=f/n**2*100
print(f"{n:.1f}%")

a=int(input()) b=(a2+3)/(aa)*100 print(str(f"{b:.1f}")+"%")

n=input() n=int(n) a=(4+n+n-1)/n**2 print(f"{a*100:.1f}%")

n=int(input()) f=4+n+(n-1) n=f/n**2*100 print(f"{n:.1f}%")