Compilare: main.cpp: In function 'int main()': main.cpp:27:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int j = 0; j < v[i].size(); j++) { | ~~^~~~~~~~~~~~~ main.cpp:46:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int j = 0; j < x.size(); j++) { | ~~^~~~~~~~~~ main.cpp:47:58: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if (x[j] == '1' && j + 1 != x.size()) { | ~~~~~~^~~~~~~~~~~ main.cpp:54:58: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | if (y[j] == '1' && j + 1 != y.size()) { | ~~~~~~^~~~~~~~~~~