Compilare: main.cpp: In function 'int main()': main.cpp:53:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (i = 0; i < order.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:90:22: warning: 'lastd' may be used uninitialized [-Wmaybe-uninitialized] 90 | fout<<lastd<<" "<<s.back()<<"\n"; | ^~~ main.cpp:77:9: note: 'lastd' was declared here 77 | int lastd, lasts; | ^~~~~ main.cpp:86:37: warning: 'lasts' may be used uninitialized [-Wmaybe-uninitialized] 86 | fout<<d.back()<<" "<<lasts<<"\n"; | ^~~~ main.cpp:77:16: note: 'lasts' was declared here 77 | int lastd, lasts; | ^~~~~