Compilare: main.cpp: In function 'int main()': main.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0; i < words.size(); i++) { | ~~^~~~~~~~~~~~~~ main.cpp:36:25: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized] 36 | if(dp[i] == ans && c == words[i].back()) { main.cpp:19:10: note: 'c' was declared here 19 | char c; | ^