Compilare: user.c: In function ‘main’: user.c:29:26: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if (i >= (1 << k + 1)) k++; ^ user.c:25:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( in, "%d%d", &n, &m ); ^ user.c:28:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( in, "%d", &v[i] ); ^ user.c:36:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d%d", &a, &b ); ^