#include <iostream>
#include <string>
#include <locale>

using namespace std;

int Temps[1001][1001];
int frozenTowns[1001];
int nTown = 0;
int nDay = 0;
string choice;
int Db = 0;
bool alwaysFrozen;

bool OkInt(int &x, int minx, int maxx)
{
    bool ok = true;
    cin >> x;
    if(cin.fail())
    {
        cin.clear();
        cin.ignore(256,'\n');
        cerr << "Hiba: nem megfelelo adattipus!" << endl;
        ok = false;
    }
    else if (x < minx || x > maxx)
    {
        cerr << "Hatarerteken kivul: " << minx << " - " << maxx << endl;
        ok = false;
    }
    return ok;
}

void GetTemps()
{
    for (int i = 1; i <= nTown; i++)
        for (int j = 1; j <= nDay; j++)
            cin >> Temps[i][j];
}

void GetManualInput()
{
    cerr << "Kerem a telepulesek szamat: ";
    while (!OkInt(nTown, 1, 1000))
    {
        cerr << "Kerem a telepulesek szamat: ";
    }
    cerr << "Kerem a napok szamat: ";
    while (!OkInt(nDay, 1, 1000))
    {
        cerr << "Kerem a napok szamat: ";
    }
}

void GetManualTemps()
{
    for (int i = 1; i <= nTown; i++)
    {
        for (int j = 1; j <= nDay; j++)
        {
            cerr << "Kerem a " << i << ". telepules " << j << ". napjanak homersekletet: ";
            while (!OkInt(Temps[i][j], -50, 50))
            {
                cerr << "Kerem a " << i << ". telepules " << j << ". napjanak homersekletet: ";
            }
        }
    }
}

bool IsNumber(string line)
{
    int i = 0;
    if (line[0] == '-')
        i++;
    while (isdigit(line[i]))
        i++;
    return !(i < (int)line.length());
}

int StringToNumber(string line)
{
    int i = 0;
    int number = 0;
    if (line[0] == '-')
        i++;
    while (isdigit(line[i]))
    {
        number = number * 10 + line[i] - '0';
        i++;
    }
    if (line[0] == '-')
        number *= -1;
    return number;
}

void Separate(string line, int &a, int &b)
{

    int i = line.find_first_of(' ');
    string left = line.substr(0, i);
    string right = line.substr(i + 1, string::npos);

    a = StringToNumber(left);
    b = StringToNumber(right);
}

bool IsMultiple(string line)
{
    return (line.find(' ') != string::npos);
}

void GetChoice()
{
    cerr << "Kerem illessze be a tesztadatokat, vagy az ellenorzott kezi adatbevitelhez irja be: KEZI: ";
    getline(cin, choice);
    if (choice == "KEZI" || choice == "kezi" || choice == "Kezi")
    {
        GetManualInput();
        GetManualTemps();
    }
    else if (IsMultiple(choice))
    {
        Separate(choice, nTown, nDay);
        GetTemps();
    }
    else
    {
        cerr << "Nem ertelmezheto bemenet..." << endl;
        GetChoice();
    }
}

void CountFrozenDays()
{
    for (int i = 1; i <= nTown; i++)
    {
        alwaysFrozen = true;
        for (int j = 1; j <= nDay; j++)
            if (Temps[i][j] >= 0)
                alwaysFrozen = false;
        if (alwaysFrozen)
        {
            Db++;
            frozenTowns[Db] = i;
        }
    }
}

void PrintFrozenDays()
{
    cerr << "Mindig fagyos telepulesek szama: ";
    cout << Db;
    cerr << "Felsorolas:";
    for (int i = 1; i <= Db; i++)
        cout << " " << frozenTowns[i];
    cout << endl;
}

int main()
{
    cerr << "Programozas komplex beadando - 2019/2020 1e" << endl;
    cerr << "Keszitette: Fonagy Denes (ia1i3q)" << endl;
    cerr << "V0.50 29/12/2019" << endl;
    cerr << "Feladat: 1. Mindig fagyos telepulesek" << endl;
    cerr << endl << endl;

    GetChoice();
    CountFrozenDays();
    PrintFrozenDays();

    return 0;
}