Compilare: main.cpp: In function 'void build_table()': main.cpp:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=1; i<pattern.length(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void kmp_search()': main.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0; i<text.length(); i++) | ~^~~~~~~~~~~~~~ main.cpp:36:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if(j == pattern.length()) | ~~^~~~~~~~~~~~~~~~~~~