Compilare: user.c: In function ‘bs’: user.c:11:3: warning: implicit declaration of function ‘ok’ [-Wimplicit-function-declaration] if(ok(med)) ^ user.c: In function ‘main’: user.c:44:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("transport.in","r",stdin); ^ user.c:45:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("transport.out","w",stdout); ^ user.c:47:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.c:51:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^