Compilare: main.cpp: In function 'int BFS(int)': main.cpp:30:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (int i = 0; i < G[u].size(); ++ i) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'int DFS(int, int)': main.cpp:54:32: 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 = ptr[node]; i < G[node].size(); ++ i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:94:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 94 | while (t = DFS(1, 1e9)) { | ~~^~~~~~~~~~~~~