Compilare: main.cpp: In function 'int main()': main.cpp:59:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i = 0; i < 7 - s.size(); ++i) | ~~^~~~~~~~~~~~~~ main.cpp:61:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:65:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for(int i = 0; i < cypher.size(); ++i) | ~~^~~~~~~~~~~~~~~