Compilare: main.cpp: In function 'void print(int, int)': main.cpp:73:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int i = 1; i < res[last].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp:83:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(int i = res[last].size() - p; i < res[last].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:87:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 87 | main() | ^~~~