1077. Kuchiguse (20)-PAT甲级真题

The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the speaker’s personality. Such a preference is called “Kuchiguse” and is often exaggerated artistically in Anime and Manga. For example, the artificial sentence ending particle “nyan~” is often used as a stereotype for characters with a cat-like personality:
Itai nyan~ (It hurts, nyan~)
Ninjin wa iyada nyan~ (I hate carrots, nyan~)
Now given a few lines spoken by the same character, can you find her Kuchiguse?

Input Specification:
Each input file contains one test case. For each case, the first line is an integer N (2<=N<=100). Following are N file lines of 0~256 (inclusive) characters in length, each representing a character’s spoken line. The spoken lines are case sensitive.

Output Specification:
For each test case, print in one line the kuchiguse of the character, i.e., the longest common suffix of all N lines. If there is no such suffix, write “nai”.

Sample Input 1:
Itai nyan~
Ninjin wa iyadanyan~
uhhh nyan~
Sample Output 1:
Sample Input 2:
Ninjinnwaiyada T_T
Sample Output 2:

首先ans = s;后来每输入的一个字符串,都和ans比较,如果后面不相同的就把它截取掉,最后输出ans即可(要逆序输出~,所以先将ans倒置reverse一下~)

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