#include<bits/stdc++.h>
using namespace std;
int main(){
    string a = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679";
    int n;
    cin >> n;
    for(int i = 0; i <= n + 1; i++){
        cout << a[i];
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int a[19238] = {1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3,3,8,3,2,7,9,5,0,2,8,8,4,1,9,7,1,6,9,3,9,9,3,7,5,1,0,5,8,2,0,9,7,4,9,4,4,5,9,2,3,0,7,8,1,6,4,0,6,2,8,6,2,0,8,9,9,8,6,2,8,0,3,4,8,2,5,3,4,2,1,1,7,0,6,7,9,}; 
int main(){
	int n;cin>>n;
	cout<<"3.";
	for(int i=1;i<=n;i++){
		cout<<a[i-1];
	}
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
#define int long long
string s="3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679";
signed main()
{
	int n;cin>>n;
	for(int i=0;i<=n+1;i++)cout<<s[i];
	return 0;
}