tea.cpp: In function 'std::pair<bool, std::vector<std::vector<int> > > solve(int, const std::vector<std::pair<int, int> >&)':
tea.cpp:13:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
13 | if (ans.back().size() > t)
| ~~~~~~~~~~~~~~~~~~^~~
tea.cpp:31:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
31 | while (l < i && ll < ans.size())
| ~~~^~~~~~~~~~~~
tea.cpp:33:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
33 | while (ll < ans.size() && ans[ll].size() == t)
| ~~~^~~~~~~~~~~~
tea.cpp:33:58: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
33 | while (ll < ans.size() && ans[ll].size() == t)
| ~~~~~~~~~~~~~~~^~~~
tea.cpp:37:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | if (ll == ans.size())
| ~~~^~~~~~~~~~~~~
tea.cpp:55:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | while (l < n && ll < ans.size())
| ~~~^~~~~~~~~~~~
tea.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | while (ll < ans.size() && ans[ll].size() == t)
| ~~~^~~~~~~~~~~~
tea.cpp:57:54: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
57 | while (ll < ans.size() && ans[ll].size() == t)
| ~~~~~~~~~~~~~~~^~~~
tea.cpp:61:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
61 | if (ll == ans.size())
| ~~~^~~~~~~~~~~~~
tea.cpp: In function 'int main()':
tea.cpp:94:41: warning: comparison of integer expressions of different signedness: 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
94 | (res.first && res.second.size() == t ? r : l) = mid;
| ~~~~~~~~~~~~~~~~~~^~~~