#include <bits/stdc++.h>
using namespace std;
long long int power(long long int x, unsigned long long int y) {
  long long int res = 1;
  while (y > 0) {
    if (y & 1) {
      res = res * x;
    }
    y = y >> 1;
    x = x * x;
  }
  return res;
}
long long int powermod(long long int x, unsigned long long int y,
                       long long int p) {
  long long int res = 1;
  x = x % p;
  while (y > 0) {
    if (y & 1) {
      res = (res * x) % p;
    }
    y = y >> 1;
    x = (x * x) % p;
  }
  return res;
}
int32_t main() {
  long long int n, k;
  cin >> n >> k;
  vector<pair<long long int, long long int> > vp[200005];
  vector<long long int> ans;
  for (long long int i = (long long int)(0); i < (long long int)(n); i++) {
    long long int l, r;
    cin >> l >> r;
    vp[l].push_back({r, i + 1});
  }
  set<pair<long long int, long long int> > s;
  for (long long int i = (long long int)(1); i < (long long int)(2e5 + 1);
       i++) {
    for (auto &val : vp[i]) {
      s.insert(val);
    }
    while (s.size() > k) {
      auto last = *prev(s.end());
      ans.push_back(last.second);
      s.erase(prev(s.end()));
    }
    while (s.size()) {
      auto f = *s.begin();
      if (f.first == i)
        s.erase(s.begin());
      else
        break;
    }
  }
  cout << ans.size() << "\n";
  for (const auto itr : ans) {
    cout << itr << ' ';
  }
  cout << "\n";
  ;
  return 0;
}
