func_code_string: #include <bits/stdc++.h>   using namespace std;   long long gcd(long long a, long long b) { return b == 0 ? a : gcd(b, a % b); }   long long qpow(long long a, long long b, long long m) {     long long r = 1;     a %= m;     for (; b; b >>= 1) {       if (b & 1) r = r * a % m;       a = a * a % m;     }     return r;   }   const int inf = 0x7fffffff;   const int maxn = 2e5 + 10;   vector<pair<int, int> > g[maxn];   vector<int> ans;   set<pair<int, int> > s;   int n, k;   int main() {     ios::sync_with_stdio(false);     cin >> n >> k;     for (int i = 1; i <= n; i++) {       int l, r;       cin >> l >> r;       g[l].push_back(pair<int, int>(r, i));     }     for (int i = 1; i <= 200000; i++) {       for (int j = 0; j < (int)(g[i]).size(); j++) s.insert(g[i][j]);       while ((int)(s).size() > k) {         set<pair<int, int> >::iterator it = s.end();         it--;         ans.push_back(it->second);         s.erase(it);       }       while (!s.empty() && (s.begin()->first) <= i) s.erase(s.begin());     }     cout << (int)(ans).size() << endl;     for (int i = 0; i < (int)(ans).size(); i++) {       if (i) cout <<    ;       cout << ans[i];     }     cout << endl;     return 0;   }   