func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, a, b, men, may;   vector<pair<int, int> > arr;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin >> n;     men = 1000000009;     for (int i = 0; i < n; i++) {       cin >> a >> b;       arr.push_back(make_pair(a, b));       men = min(a, men);       may = max(may, b);     }     for (int i = 0; i < n; i++) {       if (arr[i].first == men && arr[i].second == may) {         cout << i + 1;         return 0;       }     }     cout << -1;   }   