Compilare: main.cpp: In function 'void afisare()': main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); ++i) ~~^~~~~~~~~~ main.cpp:33:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[s[i] - 'a'] == raspuns[s[i] - 'a'].size()) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void creaza_graful()': main.cpp:110:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); ++i) ~~^~~~~~~~~~