Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS2(int, int)': main.cpp:126:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:134:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Val.size(); i++) ~~^~~~~~~~~~~~ main.cpp:136:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:152:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("regat.out", "w", stdout); ^