Compilare: main.cpp: In function 'int DFS(int)': main.cpp:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graph[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:71:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < archers.size(); i++) ~~^~~~~~~~~~~~~~~~