Compilare: user.cpp: In function ‘bool Solve(std::string, int)’: user.cpp:8:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size() > n) return 0; ^ user.cpp:9:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size() == n) { ^ user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = poz; i < s.size(); ++i) { ^ user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return s.size() == n; ^