Compilare: user.c: In function ‘solve’: user.c:60:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fdin, "%d", &T); ^ user.c:62:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fdin, "%d%d%d", &N, &M, &P); ^ user.c: In function ‘compute’: user.c:12:29: warning: ‘res’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (res * res > number) return res - 1; ^ user.c:8:9: note: ‘res’ was declared here int res; ^