Compilare: main.cpp: In function 'void DFS(int)': main.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i = 0; i < graph[crt].size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void reset()': main.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 0; i < graph.size(); ++i) { | ~~^~~~~~~~~~~~~~