k = int(input()) // 2
print(k * (k + 1))

a = tonumber(io.read())
b = tonumber(io.read())
c = tonumber(io.read())

if a > b then a, b = b, a end
if a > c then a, c = c, a end
if b > c then b, c = c, b end

print(a, b, c)

// C++ mẫu lập trình thi đấu

#include<bits/stdc++.h>
#define ll long long
using namespace std;

vector<string>split(string str, char removeChar = ' '){
    string subStr = "";str+=removeChar;
    vector<string> strSplited;

    for(char&x : str){
        if(x == removeChar && subStr != "")strSplited.push_back(subStr), subStr.clear();
        else subStr+=x;
    }

    return strSplited;
}

double str_Double(string str){
    double num = 0;

    for(ll i = 0;i < str.size();i++){
        if(str[i] == '.'){
            double phanThapPhan = 0.0;
            for(ll j = str.size()-1;j > i;j--){
                phanThapPhan+=str[j]-48;
                phanThapPhan*=0.1;
            }
            num+=phanThapPhan;break;
        }

        num = num*10 + (str[i]-48);
    }

    return num;
}

vector<double>strVT_DoubleVT(vector<string>strs){
    vector<double>nums;

    for(string&x : strs){
        nums.push_back(str_Double(x));
    }

    return nums;
}

double sum(vector<double> nums){
    double result = 0;

    for(double&x : nums)result+=x;

    return result;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    string nums;getline(cin, nums);

    cout << sum(strVT_DoubleVT(split(nums)));

    return 0;
}