road_construction.cpp: In function 'void solve(int, int, long long int)':
road_construction.cpp:76:25: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
76 | if(l > r || ans.size() == k)
| ~~~~~~~~~~~^~~~
road_construction.cpp:82:69: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
82 | for(auto it = s[idx].rbegin() ; it != s[idx].rend() && ans.size() < k ; it++)
| ~~~~~~~~~~~^~~
road_construction.cpp: In function 'bool check(long long int)':
road_construction.cpp:109:21: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
109 | return (ans.size() == k) ;
| ~~~~~~~~~~~^~~~