Compilare: main.cpp: In function 'void preprocess()': main.cpp:18:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (int i = 0; i < str.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:23:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i = 0; i < poz[l].size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp:30:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if (i+1<poz[l].size()) { | ~~~^~~~~~~~~~~~~~ main.cpp: In function 'void bfs()': main.cpp:60:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if (k+1<str.size()&&dist[k+1]>dist[k]+1) { | ~~~^~~~~~~~~~~