// halozati biztonsag.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <vector>
#include <deque>
#include <climits>
#define ll long long
using namespace std;
struct adat
{
bool lat;
ll db;
vector<ll>sz;
};
int n, i, m,a, b,k;
deque<ll>v,megold;
ll akt;
int main()
{
cin >> n >> m >> k;
vector<adat>x(n + 1);
for (i = 1; i <= m; ++i)
{
cin >> a >> b;
x[a].sz.push_back(b);
x[b].sz.push_back(a);
}
for (i = 1; i <= n; ++i)
{
x[i].db = x[i].sz.size();
if (x[i].db <k)
{
v.push_back(i);
x[i].lat = true;
}
}
while (!v.empty())
{
akt = v.front();
v.pop_front();
for (auto& e : x[akt].sz)
{
--x[e].db;
if (!x[e].lat && x[e].db < k)
{
x[e].lat = true;
v.push_back(e);
}
}
}
for (i = 1; i <= n; ++i) if (x[i].lat == false) megold.push_back(i);
cout << megold.size() << "\n";
for (auto& e : megold) cout << e<<" ";
return 0;
}
/*
8 12 3
8 7
7 3
4 3
8 5
6 5
3 1
2 1
7 1
2 7
2 3
4 6
4 7
*/
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file