Compilare: user.c: In function ‘main’: user.c:25:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &N); ^ user.c:27:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &val[i]); ^ user.c:32:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("minim.out", "w", stdout); ^ user.c:49:12: warning: ‘end’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(stdout, "%d %d %d\n", min, begin + 1, end + 1); ^ user.c:49:12: warning: ‘begin’ may be used uninitialized in this function [-Wmaybe-uninitialized]