住的地方还好， 床很大，上面足足放了6 个枕头。 一晚上就感觉睡在枕头堆里。房间里只有电视没有书桌，这个暑假基本废了。

厨房就不评价了， 做饭肯定是没戏了。 昨天吃了个叫白城堡的快餐店，呃…… 基本就是油炸的东西，太不健康了。

再有就是打扫卫生的大妈只会说 "No English"。

1. you can define an array with a variable length, e.g.

int i = 5; int a[i] = {0};

2.  const is also a keyword in C.

0    0    20
0    5    10
4    9     4
0    0      0

and a vector

a =[0 0 0 0]

How to determine a is 4-th row in A?

A quick matlab code looks like

find(ismember(A,a,’rows’))

Here is another solution which is harder to understand

e = A-repmat(a, [size(A, 1), 1]);
i = find(sum(e==0, 2)==size(A, 2));

The good news is that it’s not so hard to fix the boot failure. You need a live CD, chroot to your hard disk, sth. like this

$ sudo mount /dev/sda1 /mnt
$ sudo mount --bind /dev /mnt/dev
$ sudo mount --bind /proc /mnt/proc
$ sudo mount --bind /sys /mnt/sys
$ sudo chroot /mnt

And reconfigure the grub-pc.  And you get rewarded

This is one the default images in the debian repository. (grub2-splashimages), also my current splash image.