Compilare: main.cpp: In function 'void BFS(int)': main.cpp:45:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (i = 0; i < child[aux.node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:76:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for (j = 0; j < child[heap.top().node].size(); ++j) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~