Compilare: main.c: In function 'bfs': main.c:23:46: warning: variable 'local_dis' set but not used [-Wunused-but-set-variable] int q[MAX_NODES], q_push = 0, q_pop = 0, local_dis; ^~~~~~~~~ main.c: In function 'main': main.c:51:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:52:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:54:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &s); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:57:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^~~~~~~~~~~~~~~~~~~~~~