Compilare: main.cpp: In function 'int main()': main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s2.size(); i++) ~~^~~~~~~~~~~ main.cpp:108:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s2.size(); j++) ///atatea litere trebuie sa fixam ~~^~~~~~~~~~~