Compilare: user.cpp: In function ‘void precalcD()’: user.cpp:58:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:77:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < F[node].size(); j++) ^ user.cpp:80:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[node].size(); i++) ^ user.cpp: In function ‘void Solve()’: user.cpp:107:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘bool check(int, int)’: user.cpp:122:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < F[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:131:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("termite.out", "w", stdout); ^