aliens.cpp: In function 'void add_line(long long int)':
aliens.cpp:29:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<line>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
29 | while(id!=lines.size()-1 && lines[id+1].tm<=pr[k].second) id++;
| ~~^~~~~~~~~~~~~~~~
aliens.cpp:53:23: warning: unused variable 'vr' [-Wunused-variable]
53 | long long vr=lines[tN-1].tm, res2=lines[tN-1].res, cf2=lines[tN-1].cf, tm;
| ^~
aliens.cpp:28:24: warning: unused variable 'tm' [-Wunused-variable]
28 | long long res, br, tm, cf;
| ^~