func_code_string: #include <bits/stdc++.h>   using namespace std;   typedef struct T {     int ind;     int st;     int ds;     bool operator<(const T &one) const {       if (st != one.st) return st < one.st;       return ds < one.ds;     }   } gr;   gr grps[10000];   int n;   vector<int> mv;   int valid(int nt) {     int en = 0;     for (int i = 0; i < n; i++) {       if (i == nt) continue;       if (grps[i].st < en) return 0;       en = max(en, grps[i].ds);     }     return 1;   }   int main() {     cin >> n;     for (int i = 0; i < n; i++) {       cin >> grps[i].st;       cin >> grps[i].ds;       grps[i].ind = i + 1;     }     sort(grps, grps + n);     for (int i = 0; i < n; i++) {       if (valid(i) == 1) mv.push_back(grps[i].ind);     }     cout << mv.size() << endl;     sort(mv.begin(), mv.end());     for (int i = 0; i < mv.size(); i++) cout << mv[i] <<    ;     return 0;   }   