foo.cc: In function 'int main()':
foo.cc:5:9: error: 'cin' was not declared in this scope
    5 |         cin >> n;
      |         ^~~
foo.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | using namespace std;
foo.cc:6:9: error: 'vector' was not declared in this scope
    6 |         vector<pair<int, int>>v;
      |         ^~~~~~
foo.cc:1:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
  +++ |+#include <vector>
    1 | using namespace std;
foo.cc:6:16: error: 'pair' was not declared in this scope
    6 |         vector<pair<int, int>>v;
      |                ^~~~
foo.cc:1:1: note: 'std::pair' is defined in header '<utility>'; did you forget to '#include <utility>'?
  +++ |+#include <utility>
    1 | using namespace std;
foo.cc:6:21: error: expected primary-expression before 'int'
    6 |         vector<pair<int, int>>v;
      |                     ^~~
foo.cc:11:17: error: 'v' was not declared in this scope
   11 |                 v.push_back(make_pair(x,y));
      |                 ^
foo.cc:11:29: error: 'make_pair' was not declared in this scope
   11 |                 v.push_back(make_pair(x,y));
      |                             ^~~~~~~~~
foo.cc:11:29: note: 'std::make_pair' is defined in header '<utility>'; did you forget to '#include <utility>'?
foo.cc:13:14: error: 'v' was not declared in this scope
   13 |         sort(v.begin(), v.end(), [](const auto& v, const auto& u)
      |              ^
foo.cc:13:43: error: use of 'auto' in lambda parameter declaration only available with '-std=c++14' or '-std=gnu++14'
   13 |         sort(v.begin(), v.end(), [](const auto& v, const auto& u)
      |                                           ^~~~
foo.cc:13:58: error: use of 'auto' in lambda parameter declaration only available with '-std=c++14' or '-std=gnu++14'
   13 |         sort(v.begin(), v.end(), [](const auto& v, const auto& u)
      |                                                          ^~~~
foo.cc: In lambda function:
foo.cc:15:23: error: request for member 'first' in 'v', which is of non-class type 'const int'
   15 |                 if (v.first != u.first)
      |                       ^~~~~
foo.cc:15:34: error: request for member 'first' in 'u', which is of non-class type 'const int'
   15 |                 if (v.first != u.first)
      |                                  ^~~~~
foo.cc:16:34: error: request for member 'first' in 'v', which is of non-class type 'const int'
   16 |                         return v.first < u.first;
      |                                  ^~~~~
foo.cc:16:44: error: request for member 'first' in 'u', which is of non-class type 'const int'
   16 |                         return v.first < u.first;
      |                                            ^~~~~
foo.cc:18:34: error: request for member 'second' in 'v', which is of non-class type 'const int'
   18 |                         return v.second < u.second;
      |                                  ^~~~~~
foo.cc:18:45: error: request for member 'second' in 'u', which is of non-class type 'const int'
   18 |                         return v.second < u.second;
      |                                             ^~~~~~
foo.cc: In function 'int main()':
foo.cc:13:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   13 |         sort(v.begin(), v.end(), [](const auto& v, const auto& u)
      |         ^~~~
      |         short
foo.cc:23:34: error: 'r' was not declared in this scope
   23 |                 if (v[i].first > r||v[i].second>r)
      |                                  ^
foo.cc:31:29: error: 'max' was not declared in this scope
   31 |                         l = max(l, v[i].first);
      |                             ^~~
foo.cc:32:29: error: 'min' was not declared in this scope; did you mean 'main'?
   32 |                         r = min(r, v[i].second);
      |                             ^~~
      |                             main
foo.cc:38:9: error: 'cout' was not declared in this scope
   38 |         cout << ans;
      |         ^~~~
foo.cc:38:9: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?

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