Compilare: user.c: In function ‘solve’: user.c:38:10: warning: unused variable ‘j’ [-Wunused-variable] int i, j, p; ^ user.c: In function ‘main’: user.c:50:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:52:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^