Compilare: main.cpp: In function 'int main()': main.cpp:59:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | while (i < s.size()) { | ~~^~~~~~~~~~ main.cpp:92:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | if (st < 0 || st >= s.size() || dr < 0 || dr >= s.size()) | ~~~^~~~~~~~~~~ main.cpp:92:50: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | if (st < 0 || st >= s.size() || dr < 0 || dr >= s.size()) | ~~~^~~~~~~~~~~ main.cpp:96:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:104:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | if (i == s.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp:110:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for (int i = 0; i < prefix.size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp:117:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 117 | while (dr < s.size() - prefix[i]) { main.cpp:119:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | if (dr >= s.size()) | ~~~^~~~~~~~~~~ main.cpp:76:7: warning: unused variable 'x' [-Wunused-variable] 76 | int x = kmp[s.size() - 1]; | ^