Compilare: main.cpp: In function 'int main()': main.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int i = 0; i < G[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp:15:12: warning: 'm' is used uninitialized [-Wuninitialized] 15 | while(m--) { | ~^~ main.cpp:14:12: note: 'm' was declared here 14 | int n, m; | ^ main.cpp:14:9: warning: 'n' may be used uninitialized [-Wmaybe-uninitialized] 14 | int n, m; | ^