Compilare: main.cpp: In function 'int main()': main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (i = 1; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:56:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int j = i, ind = 0; j < s.size() and s[j] == s[ind]; j++, ind++) | ~~^~~~~~~~~~ main.cpp:72:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (int j = i, ind = 0; j < s.size() and s[j] == s[ind]; j++, ind++) | ~~^~~~~~~~~~ main.cpp:82:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for (i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:100:17: warning: unused variable 'v' [-Wunused-variable] 100 | int v = query(1, 1, s.size(), 1, j - 1); | ^