Compilare: main.c: In function 'main': main.c:25:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:26:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:28:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&n,&m,&s); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:31:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^~~~~~~~~~~~~~~~~~~~ main.c:41:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&n,&m,&s),s--; ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:44:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^~~~~~~~~~~~~~~~~~~~