Compilare: main.cpp: In function 'void solve()': main.cpp:85:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | if (mx < graph[i].size()) { | ~~~^~~~~~~~~~~~~~~~~ main.cpp:103:29: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 103 | if (graph[i].size() < mx) { | ~~~~~~~~~~~~~~~~^~~~ main.cpp:96:9: warning: 'node' may be used uninitialized [-Wmaybe-uninitialized] 96 | int prev_node = node; | ^~~~~~~~~ main.cpp:83:17: note: 'node' was declared here 83 | int mx = 0, node; | ^~~~