Compilare: user.c: In function ‘main’: user.c:5:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("distante.in","r",stdin),freopen("distante.out","w",stdout),scanf("%d",&t); ^ user.c:5:42: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("distante.in","r",stdin),freopen("distante.out","w",stdout),scanf("%d",&t); ^ user.c:5:75: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("distante.in","r",stdin),freopen("distante.out","w",stdout),scanf("%d",&t); ^ user.c:7:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&s); ^ user.c:9:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",d+i),f[i]=0; ^ user.c:11:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a[i],&b[i],&c[i]),w[a[i]]++,w[b[i]]++; ^