Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i=0;i<gr[x].size();i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:110:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for (int j=0;j<gr[i].size();j++) | ~^~~~~~~~~~~~~