Compilare: user.c: In function ‘main’: user.c:7:4: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.c:8:25: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for (j=1; j<=n; j++){scanf("%ld",&v[i]); //j=0 ^ user.c:27:4: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&m); ^ user.c:29:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] { scanf("%ld %ld",&l,&r); ^ user.c:9:20: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] M[0][j]=v[i]; ^