Compilare: main.cpp: In function 'std::vector<std::__cxx11::basic_string<char> > flip(const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:12:19: 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] 12 | for(int i=0; i<mat.size(); ++i) | ~^~~~~~~~~~~ main.cpp:13:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | 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:33:19: 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] 33 | for(int i=0; i<v.size(); ++i) | ~^~~~~~~~~ main.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while(i+man[i]<man.size() && i-man[i]>=0 && v[i+man[i]]==v[i-man[i]]) | ~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'std::vector<int> getVec(const std::vector<int>&)': main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | 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:77:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int i=1; i<left.size(); ++i) | ~^~~~~~~~~~~~ main.cpp:81:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i=1; i<right.size(); ++i) | ~^~~~~~~~~~~~~