Compilare: main.cpp: In function 'int max_flow(int, int)': main.cpp:42:31: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while (new_flow = bfs(s, t)) { ^ main.cpp: In function 'int main()': main.cpp:56:39: 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:57:41: 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:59:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ main.cpp:62:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a, &b, &c); ^