Compilare: main.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > flip(const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:13:19: 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] 13 | for(int i=0; i<mat.size(); ++i) | ~^~~~~~~~~~~ main.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int j=0; j<mat[i].size(); ++j) | ~^~~~~~~~~~~~~~ main.cpp: In function 'std::vector<int> manacher(const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = 0; i < man.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:39:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while (i - man[i] >= 0 && i + man[i] < man.size() | ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'std::vector<int> getVec(const std::vector<int>&)': main.cpp:74:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for(int i=0; i<man.size(); i+=2) | ~^~~~~~~~~~~ main.cpp: In function 'long long int solve(const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:97:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for(int i=1; i<left.size(); ++i) | ~^~~~~~~~~~~~ main.cpp:101:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(int i=1; i<right.size(); ++i) | ~^~~~~~~~~~~~~