Compilare: user.cpp: In function ‘bool BFS(int)’: user.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i != G[t].size(); ++i) { ^ user.cpp: In function ‘int DFS(int, int)’: user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; nedge[v] != G[v].size(); ++nedge[v]) { ^ user.cpp: In function ‘int blockingFlow()’: user.cpp:69:30: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while (flow = DFS(0, INFINIT)) totalFlow += flow; ^ user.cpp: In function ‘void input()’: user.cpp:81:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:85:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &a, &b, &c); ^ user.cpp: In function ‘int main()’: user.cpp:94:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(InFile, "r", stdin); ^ user.cpp:95:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(OuFile, "w", stdout); ^