Compilare: main.cpp: In function 'int BF()': main.cpp:34:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < G[nod].sz; j++) ^ main.cpp: In function 'int main()': main.cpp:65:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G[N].sz; i++) ^ main.cpp:49:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in", "r", stdin); ^ main.cpp:50:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out", "w", stdout); ^ main.cpp:54:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &N, &M); ^ main.cpp:58:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d ", &x, &y, &z); ^