Compilare: user.c: In function ‘main’: user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:40: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:68: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:7:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&r),y=b[j]>c[j-1]?b[j]:c[j-1],e=r-y,s=b[j]=c[j]=y>e?y:e; ^