Compilare: main.cpp: In function 'void solve()': main.cpp:82:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | if (mx < graph[i].size()) { | ~~~^~~~~~~~~~~~~~~~~ main.cpp:93:9: warning: 'node' may be used uninitialized [-Wmaybe-uninitialized] 93 | int prev_node = node; | ^~~~~~~~~ main.cpp:80:17: note: 'node' was declared here 80 | int mx = 0, node; | ^~~~