Compilare: user.cpp:11:20: warning: character constant too long for its type cout << v.find('aaabbb') << '\n'; ^~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:11:28: warning: overflow in implicit constant conversion [-Woverflow] cout << v.find('aaabbb') << '\n'; ^ user.cpp:23:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i ++) ~~^~~~~~~~~~ user.cpp:17:13: warning: unused variable ‘mx’ [-Wunused-variable] int mx = 0; ^~