Compilare: main.cpp: In function 'int main()': main.cpp:26:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); ++i) ~~^~~~~~~~~~ main.cpp:37:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s[posb] != 'B' && posb < s.size()) ~~~~~^~~~~~~~~~ main.cpp:50:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 2; j < s.size() - 1; ++j) ~~^~~~~~~~~~~~~~