Compilare: main.cpp: In function 'void merge(const std::vector<int>&, const std::vector<int>&, std::vector<int>&)': main.cpp:78:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < a.size()) { ~~^~~~~~~~~~ main.cpp:78:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size() && j < a.size()) { ~~^~~~~~~~~~ main.cpp:89:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < a.size()) { ~~^~~~~~~~~~ main.cpp:94:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < b.size()) { ~~^~~~~~~~~~