Compilare: main.cpp: In function 'std::vector<int> reuniune(std::vector<int>, std::vector<int>)': main.cpp:65:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:65:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:84:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size()) ~~^~~~~~~~~~ main.cpp:89:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size()) ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> intersectie(std::vector<int>, std::vector<int>)': main.cpp:101:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:101:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:182:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i ++) ~~^~~~~~~~~~~~