Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:33:30: warning: comparison of integer expressions of different signedness: 'short int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for(short& i = ptr[u]; i < g[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:130:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 130 | auto[u, v] = edges[i]; | ^