Compilare: main.cpp: In function 'std::vector<int> Merge(std::vector<int>, std::vector<int>)': main.cpp:25:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()){ ~~^~~~~~~~~~ main.cpp:25:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < b.size()){ ~~^~~~~~~~~~ main.cpp:33:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size()){ ~~^~~~~~~~~~ main.cpp:36:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size()){ ~~^~~~~~~~~~