Compilare: main.cpp: In function 'int get_first_common_element(std::vector<int>, std::vector<int>)': main.cpp:10:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:43:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < arcasi.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < drum.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:58:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < drum.size(); j++) ~~^~~~~~~~~~~~~ main.cpp:66:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < noduri_comune.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:26:6: warning: unused variable 'arcas' [-Wunused-variable] int arcas, locatie_arcas, nod_comun; ^~~~~