Compilare: user.c: In function ‘main’: user.c:33:24: warning: unused variable ‘z’ [-Wunused-variable] long long temp,x,y,z; ^ user.c:33:22: warning: unused variable ‘y’ [-Wunused-variable] long long temp,x,y,z; ^ user.c:33:20: warning: unused variable ‘x’ [-Wunused-variable] long long temp,x,y,z; ^ user.c:11:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.in","r",stdin); ^ user.c:12:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.out","w",stdout); ^ user.c:14:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.c:17:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&A[i]); ^ user.c:21:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&B[i]); ^