Compilare: main.cpp: In function 'std::vector<int> manacher(std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:38:19: 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] 38 | for(int i=0; i<mat.size(); ++i) | ~^~~~~~~~~~~ main.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while(i+man[i]<man.size() && i-man[i]>=0 && mat[i+man[i]]==mat[i-man[i]]) | ~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'std::vector<int> getVec(std::vector<int>&)': main.cpp:59:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i=0; i<man.size(); i+=2) | ~^~~~~~~~~~~ main.cpp:65:21: warning: moving a local object in a return statement prevents copy elision [-Wpessimizing-move] 65 | return std::move(ans); | ~~~~~~~~~^~~~~ main.cpp:65:21: note: remove 'std::move' call main.cpp: In function 'long long int solve(std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:83:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(int i=1; i<left.size(); ++i) | ~^~~~~~~~~~~~ main.cpp:87:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for(int i=1; i<right.size(); ++i) | ~^~~~~~~~~~~~~