Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:90:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void DFS2(int, int)’: user.cpp:123:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i++) ^ user.cpp:131:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Val.size(); i++) ^ user.cpp:133:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:149:38: 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); ^