Compilare: main.cpp: In function 'std::vector<int> intersectie(std::vector<int>, std::vector<int>)': main.cpp:29:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < v.size() && j < w.size() ) { ~~^~~~~~~~~~ main.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < v.size() && j < w.size() ) { ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> reuniune(std::vector<int>, std::vector<int>)': main.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < v.size() && j < w.size() ) { ~~^~~~~~~~~~ main.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < v.size() && j < w.size() ) { ~~^~~~~~~~~~ main.cpp:53:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( ; i < v.size(); i++ ) ~~^~~~~~~~~~ main.cpp:55:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( ; j < w.size(); j++ ) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:108:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < sol.size(); i++ ) ~~^~~~~~~~~~~~