Compilare: main.cpp: In function 'int main()': main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0; i < words.size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp:46:26: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized] 46 | if (dp[i] == ans && c == words[i].back()) main.cpp:25:10: note: 'c' was declared here 25 | char c; | ^