#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using namespace std;


int main()
{
    // creat array numbers
    vector<int> a;
    // open file in read mode
    fstream file("input_number.txt", ios::in);
    if(!file.is_open()) return -1;

    string number;

    // read all numbers with numbers.txt
    while(getline(file, number, ' ')){
        a.push_back(stoi(number));
    }
    file.close();

    // open file in write mode
    file.open("output_number.txt", ios::out);
    if(!file.is_open()) return -2;

    // write down real numbers b
    float f;
    for(int i = 2; i < int(a.size()); i++){
        f = 0;
        for(int j = 0; j <= i; j++){
            f += a[j];
        }
        f = a[i]/(1 + f * f);
        file << f << ' ';
    }
    file.close();
    return 0;
}