Compilare: user.c: In function ‘main’: user.c:8:16: warning: unused variable ‘p’ [-Wunused-variable] long long x,p; ^ user.c:14:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d",&n); ^ user.c:15:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d",&m); ^ user.c:19:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^