Compilare: main.cpp: In function 'int numar(int)': main.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp_d[p].size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < expresie.size()-1; i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp_d.size(); i++) { ~~^~~~~~~~~~~~~~