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

using namespace std;


double stringToDouble(const std::string& s)
{
    std::istringstream i(s);
    double x;
    if (!(i >> x))
        return 0;
    return x;
}

int main ()
{
    string line;
    ifstream myfile("input.txt");

    getline (myfile,line);
    myfile.close();

    int symbCount = 1;

    for (int i = 0; i < line.length(); i++)
    {
        if (line[i] == ' ')
            symbCount++;
    }

    string* arr = new string[symbCount];
    double* darr = new double[symbCount];

    int cur = 0;
    for (int i = 0; i < line.length(); i++)
    {
        if (line[i] == ' ')
            cur++;
        else
            arr[cur] += line[i];
    }

    vector<int> positions;
    for (int i = 0; i < symbCount; i++)
    {
        darr[i] = stringToDouble(arr[i]);
        if (darr[i] < 0)
            positions.push_back(i);
    }

    ofstream out("output.txt");

    for (int i = 0; i < positions.size(); i++)
        out << positions[i] << " ";

  return 0;
}