Compilare: user.cpp: In function ‘void bfs2(int, int)’: user.cpp:63:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok = 0; ^ user.cpp: In function ‘int main()’: user.cpp:90:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("critice.in","r",stdin); ^ user.cpp:91:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("critice.out","w",stdout); ^ user.cpp:93:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:97:56: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &node1, &node2 , &capacitate); ^