Compilare: main.cpp: In function 'int rec(int)': main.cpp:45:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | if(depth == v.size()) | ~~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:75:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int j = 0;j < s.size();++j) | ~~^~~~~~~~~~